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716154c5
BB		 1###############################################################################
2# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
3# Copyright (C) 2007 The Regents of the University of California.
4# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
5###############################################################################
6# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
7###############################################################################
8
86933a6e
BB		 9AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
10 SPL_AC_KERNEL
11
86933a6e
BB		 12 if test "${LINUX_OBJ}" != "${LINUX}"; then
13 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
14 fi
86933a6e 15 AC_SUBST(KERNELMAKE_PARAMS)
a7958f7e
BB		 16
17 KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
86933a6e
BB		 18 AC_SUBST(KERNELCPPFLAGS)
19
20 SPL_AC_DEBUG
4b2220f0 21 SPL_AC_DEBUG_LOG
86933a6e 22 SPL_AC_DEBUG_KMEM
055ffd98 23 SPL_AC_DEBUG_KMEM_TRACKING
0408008b 24 SPL_AC_TEST_MODULE
5e9b5d83 25 SPL_AC_ATOMIC_SPINLOCK
302b88e6
BB		 26 SPL_AC_TYPE_ATOMIC64_CMPXCHG
27 SPL_AC_TYPE_ATOMIC64_XCHG
d04c8a56 28 SPL_AC_TYPE_UINTPTR_T
86933a6e
BB		 29 SPL_AC_3ARGS_INIT_WORK
30 SPL_AC_2ARGS_REGISTER_SYSCTL
31 SPL_AC_SET_SHRINKER
23aa63cb 32 SPL_AC_3ARGS_SHRINKER_CALLBACK
86933a6e
BB		 33 SPL_AC_PATH_IN_NAMEIDATA
34 SPL_AC_TASK_CURR
35 SPL_AC_CTL_UNNUMBERED
79a3bf13 36 SPL_AC_CTL_NAME
86933a6e
BB		 37 SPL_AC_FLS64
38 SPL_AC_DEVICE_CREATE
39 SPL_AC_5ARGS_DEVICE_CREATE
40 SPL_AC_CLASS_DEVICE_CREATE
41 SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
42 SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
43 SPL_AC_TIMESPEC_SUB
44 SPL_AC_INIT_UTSNAME
45 SPL_AC_FDTABLE_HEADER
46 SPL_AC_FILES_FDTABLE
e0093fea 47 SPL_AC_CLEAR_CLOSE_ON_EXEC
86933a6e
BB		 48 SPL_AC_UACCESS_HEADER
49 SPL_AC_KMALLOC_NODE
50 SPL_AC_MONOTONIC_CLOCK
51 SPL_AC_INODE_I_MUTEX
4d54fdee 52 SPL_AC_MUTEX_OWNER
86fd39f3 53 SPL_AC_MUTEX_OWNER_TASK_STRUCT
86933a6e 54 SPL_AC_MUTEX_LOCK_NESTED
86933a6e
BB		 55 SPL_AC_3ARGS_ON_EACH_CPU
56 SPL_AC_KALLSYMS_LOOKUP_NAME
57 SPL_AC_GET_VMALLOC_INFO
58 SPL_AC_PGDAT_HELPERS
59 SPL_AC_FIRST_ONLINE_PGDAT
60 SPL_AC_NEXT_ONLINE_PGDAT
61 SPL_AC_NEXT_ZONE
62 SPL_AC_PGDAT_LIST
86933a6e 63 SPL_AC_GLOBAL_PAGE_STATE
6ae7fef5
BB		 64 SPL_AC_ZONE_STAT_ITEM_FREE
65 SPL_AC_ZONE_STAT_ITEM_INACTIVE
66 SPL_AC_ZONE_STAT_ITEM_ACTIVE
67 SPL_AC_GET_ZONE_COUNTS
7119bf70 68 SPL_AC_USER_PATH_DIR
51a727e9
BB		 69 SPL_AC_SET_FS_PWD
70 SPL_AC_2ARGS_SET_FS_PWD
86933a6e
BB		 71 SPL_AC_2ARGS_VFS_UNLINK
72 SPL_AC_4ARGS_VFS_RENAME
0d0b5237
BB		 73 SPL_AC_VFS_FSYNC
74 SPL_AC_2ARGS_VFS_FSYNC
bbdc6ae4 75 SPL_AC_INODE_TRUNCATE_RANGE
9b2048c2 76 SPL_AC_FS_STRUCT_SPINLOCK
ec7d53e9
BB		 77 SPL_AC_CRED_STRUCT
78 SPL_AC_GROUPS_SEARCH
e811949a 79 SPL_AC_PUT_TASK_STRUCT
3977f837 80 SPL_AC_5ARGS_PROC_HANDLER
b868e22f 81 SPL_AC_KVASPRINTF
46aa7b39 82 SPL_AC_EXPORTED_RWSEM_IS_LOCKED
914b0631 83 SPL_AC_KERNEL_INVALIDATE_INODES
9b0f9079 84 SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
e76f4bf1
BB		 85 SPL_AC_SHRINK_DCACHE_MEMORY
86 SPL_AC_SHRINK_ICACHE_MEMORY
12ff95ff
BB		 87 SPL_AC_KERN_PATH_PARENT_HEADER
88 SPL_AC_KERN_PATH_PARENT_SYMBOL
3dfc591a 89 SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
a55bcaad 90 SPL_AC_SHRINK_CONTROL_STRUCT
588d9004 91 SPL_AC_RWSEM_SPINLOCK_IS_RAW
86933a6e
BB		 92])
93
94AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
bb339d06 95 modpost=$LINUX/scripts/Makefile.modpost
86933a6e 96 AC_MSG_CHECKING([kernel file name for module symbols])
0408008b 97 if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
bb339d06
BB		 98 if grep -q Modules.symvers $modpost; then
99 LINUX_SYMBOLS=Modules.symvers
100 else
101 LINUX_SYMBOLS=Module.symvers
102 fi
912fd84d
BB		 103
104 if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
105 AC_MSG_ERROR([
106 *** Please make sure the kernel devel package for your distribution
107 *** is installed. If your building with a custom kernel make sure the
108 *** kernel is configured, built, and the '--with-linux=PATH' configure
109 *** option refers to the location of the kernel source.])
110 fi
86933a6e 111 else
bb339d06 112 LINUX_SYMBOLS=NONE
86933a6e
BB		 113 fi
114 AC_MSG_RESULT($LINUX_SYMBOLS)
115 AC_SUBST(LINUX_SYMBOLS)
116])
117
57d86234 118AC_DEFUN([SPL_AC_KERNEL], [
57d86234 119 AC_ARG_WITH([linux],
120 AS_HELP_STRING([--with-linux=PATH],
121 [Path to kernel source]),
39a3d2a4 122 [kernelsrc="$withval"])
57d86234 123
124 AC_ARG_WITH([linux-obj],
125 AS_HELP_STRING([--with-linux-obj=PATH],
126 [Path to kernel build objects]),
127 [kernelbuild="$withval"])
128
129 AC_MSG_CHECKING([kernel source directory])
130 if test -z "$kernelsrc"; then
22ccfaa8
BB		 131 if test -e "/lib/modules/$(uname -r)/source"; then
132 headersdir="/lib/modules/$(uname -r)/source"
133 sourcelink=$(readlink -f "$headersdir")
134 elif test -e "/lib/modules/$(uname -r)/build"; then
135 headersdir="/lib/modules/$(uname -r)/build"
534c4e38
BM		 136 sourcelink=$(readlink -f "$headersdir")
137 else
138 sourcelink=$(ls -1d /usr/src/kernels/* \
723aa3b0 139 /usr/src/linux-* \
534c4e38
BM		 140 2>/dev/null | grep -v obj | tail -1)
141 fi
57d86234 142
8fd4e3af 143 if test -n "$sourcelink" && test -e ${sourcelink}; then
d4326403 144 kernelsrc=`readlink -f ${sourcelink}`
d4326403 145 else
57d86234 146 AC_MSG_RESULT([Not found])
147 AC_MSG_ERROR([
8fd4e3af
BB		 148 *** Please make sure the kernel devel package for your distribution
149 *** is installed then try again. If that fails you can specify the
150 *** location of the kernel source with the '--with-linux=PATH' option.])
57d86234 151 fi
c5f70460
BB		 152 else
153 if test "$kernelsrc" = "NONE"; then
154 kernsrcver=NONE
155 fi
57d86234 156 fi
157
158 AC_MSG_RESULT([$kernelsrc])
159 AC_MSG_CHECKING([kernel build directory])
39a3d2a4 160 if test -z "$kernelbuild"; then
22ccfaa8
BB		 161 if test -e "/lib/modules/$(uname -r)/build"; then
162 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
163 elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
e2d28a37
BB		 164 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
165 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
166 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
167 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
168 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
39a3d2a4
BB		 169 else
170 kernelbuild=${kernelsrc}
171 fi
bf338d8d 172 fi
57d86234 173 AC_MSG_RESULT([$kernelbuild])
174
175 AC_MSG_CHECKING([kernel source version])
fd921c2e
BB		 176 utsrelease1=$kernelbuild/include/linux/version.h
177 utsrelease2=$kernelbuild/include/linux/utsrelease.h
178 utsrelease3=$kernelbuild/include/generated/utsrelease.h
179 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
180 utsrelease=linux/version.h
181 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
182 utsrelease=linux/utsrelease.h
183 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
184 utsrelease=generated/utsrelease.h
185 fi
57d86234 186
fd921c2e
BB		 187 if test "$utsrelease"; then
188 kernsrcver=`(echo "#include <$utsrelease>";
57d86234 189 echo "kernsrcver=UTS_RELEASE") |
d4326403 190 cpp -I $kernelbuild/include |
57d86234 191 grep "^kernsrcver=" | cut -d \" -f 2`
57d86234 192
fd921c2e
BB		 193 if test -z "$kernsrcver"; then
194 AC_MSG_RESULT([Not found])
195 AC_MSG_ERROR([*** Cannot determine kernel version.])
196 fi
197 else
57d86234 198 AC_MSG_RESULT([Not found])
0408008b
ED		 199 if test "x$enable_linux_builtin" != xyes; then
200 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
201 else
202 AC_MSG_ERROR([
203 *** Cannot find UTS_RELEASE definition.
204 *** Please run 'make prepare' inside the kernel source tree.])
205 fi
57d86234 206 fi
207
208 AC_MSG_RESULT([$kernsrcver])
209
57d86234 210 LINUX=${kernelsrc}
211 LINUX_OBJ=${kernelbuild}
c5f70460
BB		 212 LINUX_VERSION=${kernsrcver}
213
57d86234 214 AC_SUBST(LINUX)
215 AC_SUBST(LINUX_OBJ)
c5f70460 216 AC_SUBST(LINUX_VERSION)
57d86234 217
86933a6e 218 SPL_AC_MODULE_SYMVERS
2e0e7e69
BB		 219])
220
287b2fb1
BB		 221dnl #
222dnl # Default SPL user configuration
223dnl #
ad35b6a6 224AC_DEFUN([SPL_AC_CONFIG_USER], [])
287b2fb1
BB		 225
226dnl #
227dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
228dnl # are missing it is non-fatal but you will not be able to build
229dnl # RPM packages and will be warned if you try too.
230dnl #
231AC_DEFUN([SPL_AC_RPM], [
232 RPM=rpm
233 RPMBUILD=rpmbuild
234
235 AC_MSG_CHECKING([whether $RPM is available])
236 AS_IF([tmp=$($RPM --version 2>/dev/null)], [
237 RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
238 HAVE_RPM=yes
239 AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
240 ],[
241 HAVE_RPM=no
242 AC_MSG_RESULT([$HAVE_RPM])
243 ])
244
245 AC_MSG_CHECKING([whether $RPMBUILD is available])
246 AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
247 RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
248 HAVE_RPMBUILD=yes
249 AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
250 ],[
251 HAVE_RPMBUILD=no
252 AC_MSG_RESULT([$HAVE_RPMBUILD])
253 ])
254
255 AC_SUBST(HAVE_RPM)
256 AC_SUBST(RPM)
257 AC_SUBST(RPM_VERSION)
258
259 AC_SUBST(HAVE_RPMBUILD)
260 AC_SUBST(RPMBUILD)
261 AC_SUBST(RPMBUILD_VERSION)
262])
263
264dnl #
265dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
266dnl # tools are missing it is non-fatal but you will not be able to build
267dnl # DEB packages and will be warned if you try too.
268dnl #
269AC_DEFUN([SPL_AC_DPKG], [
270 DPKG=dpkg
271 DPKGBUILD=dpkg-buildpackage
272
273 AC_MSG_CHECKING([whether $DPKG is available])
274 AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
275 DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
276 HAVE_DPKG=yes
277 AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
278 ],[
279 HAVE_DPKG=no
280 AC_MSG_RESULT([$HAVE_DPKG])
281 ])
282
283 AC_MSG_CHECKING([whether $DPKGBUILD is available])
284 AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
285 DPKGBUILD_VERSION=$(echo $tmp | \
286 $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
287 HAVE_DPKGBUILD=yes
288 AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
289 ],[
290 HAVE_DPKGBUILD=no
291 AC_MSG_RESULT([$HAVE_DPKGBUILD])
292 ])
293
294 AC_SUBST(HAVE_DPKG)
295 AC_SUBST(DPKG)
296 AC_SUBST(DPKG_VERSION)
297
298 AC_SUBST(HAVE_DPKGBUILD)
299 AC_SUBST(DPKGBUILD)
300 AC_SUBST(DPKGBUILD_VERSION)
301])
302
c2dceb5c
PS		 303dnl #
304dnl # Check for pacman+makepkg to build Arch Linux packages. If these
305dnl # tools are missing it is non-fatal but you will not be able to
306dnl # build Arch Linux packages and will be warned if you try too.
307dnl #
308AC_DEFUN([SPL_AC_PACMAN], [
309 PACMAN=pacman
310 MAKEPKG=makepkg
311
312 AC_MSG_CHECKING([whether $PACMAN is available])
313 tmp=$($PACMAN --version 2>/dev/null)
314 AS_IF([test -n "$tmp"], [
315 PACMAN_VERSION=$(echo $tmp |
316 $AWK '/Pacman/ { print $[3] }' |
317 $SED 's/^v//')
318 HAVE_PACMAN=yes
319 AC_MSG_RESULT([$HAVE_PACMAN ($PACMAN_VERSION)])
320 ],[
321 HAVE_PACMAN=no
322 AC_MSG_RESULT([$HAVE_PACMAN])
323 ])
324
325 AC_MSG_CHECKING([whether $MAKEPKG is available])
326 tmp=$($MAKEPKG --version 2>/dev/null)
327 AS_IF([test -n "$tmp"], [
328 MAKEPKG_VERSION=$(echo $tmp | $AWK '/makepkg/ { print $[3] }')
329 HAVE_MAKEPKG=yes
330 AC_MSG_RESULT([$HAVE_MAKEPKG ($MAKEPKG_VERSION)])
331 ],[
332 HAVE_MAKEPKG=no
333 AC_MSG_RESULT([$HAVE_MAKEPKG])
334 ])
335
336 AC_SUBST(HAVE_PACMAN)
337 AC_SUBST(PACMAN)
338 AC_SUBST(PACMAN_VERSION)
339
340 AC_SUBST(HAVE_MAKEPKG)
341 AC_SUBST(MAKEPKG)
342 AC_SUBST(MAKEPKG_VERSION)
343])
344
287b2fb1
BB		 345dnl #
346dnl # Until native packaging for various different packing systems
347dnl # can be added the least we can do is attempt to use alien to
348dnl # convert the RPM packages to the needed package type. This is
349dnl # a hack but so far it has worked reasonable well.
350dnl #
351AC_DEFUN([SPL_AC_ALIEN], [
352 ALIEN=alien
353
354 AC_MSG_CHECKING([whether $ALIEN is available])
355 AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
356 ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
357 HAVE_ALIEN=yes
358 AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
359 ],[
360 HAVE_ALIEN=no
361 AC_MSG_RESULT([$HAVE_ALIEN])
362 ])
363
364 AC_SUBST(HAVE_ALIEN)
365 AC_SUBST(ALIEN)
366 AC_SUBST(ALIEN_VERSION)
367])
368
369dnl #
370dnl # Using the VENDOR tag from config.guess set the default
371dnl # package type for 'make pkg': (rpm | deb | tgz)
372dnl #
373AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
73fc084e 374 AC_MSG_CHECKING([linux distribution])
a3a69b74
BB		 375 if test -f /etc/toss-release ; then
376 VENDOR=toss ;
73fc084e
BB		 377 elif test -f /etc/fedora-release ; then
378 VENDOR=fedora ;
a3a69b74
BB		 379 elif test -f /etc/redhat-release ; then
380 VENDOR=redhat ;
381 elif test -f /etc/gentoo-release ; then
382 VENDOR=gentoo ;
cd2817f8
PS		 383 elif test -f /etc/arch-release ; then
384 VENDOR=arch ;
73fc084e
BB		 385 elif test -f /etc/SuSE-release ; then
386 VENDOR=sles ;
387 elif test -f /etc/slackware-version ; then
388 VENDOR=slackware ;
a3a69b74
BB		 389 elif test -f /etc/lunar.release ; then
390 VENDOR=lunar ;
391 elif test -f /etc/lsb-release ; then
392 VENDOR=ubuntu ;
393 elif test -f /etc/debian_version ; then
394 VENDOR=debian ;
73fc084e
BB		 395 else
396 VENDOR= ;
397 fi
398 AC_MSG_RESULT([$VENDOR])
399 AC_SUBST(VENDOR)
287b2fb1
BB		 400
401 AC_MSG_CHECKING([default package type])
402 case "$VENDOR" in
a3a69b74
BB		 403 toss) DEFAULT_PACKAGE=rpm ;;
404 redhat) DEFAULT_PACKAGE=rpm ;;
405 fedora) DEFAULT_PACKAGE=rpm ;;
406 gentoo) DEFAULT_PACKAGE=tgz ;;
407 arch) DEFAULT_PACKAGE=arch ;;
408 sles) DEFAULT_PACKAGE=rpm ;;
409 slackware) DEFAULT_PACKAGE=tgz ;;
410 lunar) DEFAULT_PACKAGE=tgz ;;
411 ubuntu) DEFAULT_PACKAGE=deb ;;
412 debian) DEFAULT_PACKAGE=deb ;;
413 *) DEFAULT_PACKAGE=rpm ;;
287b2fb1
BB		 414 esac
415
416 AC_MSG_RESULT([$DEFAULT_PACKAGE])
417 AC_SUBST(DEFAULT_PACKAGE)
418])
419
420dnl #
421dnl # Default SPL user configuration
422dnl #
423AC_DEFUN([SPL_AC_PACKAGE], [
0b14b9f3 424 SPL_AC_DEFAULT_PACKAGE
287b2fb1
BB		 425 SPL_AC_RPM
426 SPL_AC_DPKG
427 SPL_AC_ALIEN
0b14b9f3
BB		 428
429 AS_IF([test "$VENDOR" = "arch"], [SPL_AC_PACMAN])
287b2fb1
BB		 430])
431
6a1c3d41 432AC_DEFUN([SPL_AC_LICENSE], [
86933a6e
BB		 433 AC_MSG_CHECKING([spl license])
434 LICENSE=GPL
435 AC_MSG_RESULT([$LICENSE])
6a1c3d41 436 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
86933a6e
BB		 437 AC_SUBST(LICENSE)
438])
439
440AC_DEFUN([SPL_AC_CONFIG], [
0408008b
ED		 441 SPL_CONFIG=all
442 AC_ARG_WITH([config],
443 AS_HELP_STRING([--with-config=CONFIG],
444 [Config file 'kernel|user|all|srpm']),
445 [SPL_CONFIG="$withval"])
446 AC_ARG_ENABLE([linux-builtin],
447 [AC_HELP_STRING([--enable-linux-builtin],
448 [Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
449 [],
450 [enable_linux_builtin=no])
451
452 AC_MSG_CHECKING([spl config])
453 AC_MSG_RESULT([$SPL_CONFIG]);
454 AC_SUBST(SPL_CONFIG)
455
456 case "$SPL_CONFIG" in
457 kernel) SPL_AC_CONFIG_KERNEL ;;
458 user) SPL_AC_CONFIG_USER ;;
459 all) SPL_AC_CONFIG_KERNEL
460 SPL_AC_CONFIG_USER ;;
c1541dfe 461 srpm) ;;
0408008b
ED		 462 *)
463 AC_MSG_RESULT([Error!])
464 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
465 user kernel|user|all|srpm]) ;;
466 esac
467
468 AM_CONDITIONAL([CONFIG_USER],
469 [test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
470 AM_CONDITIONAL([CONFIG_KERNEL],
471 [test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
472 [test "x$enable_linux_builtin" != xyes ])
6a1c3d41 473])
474
055ffd98
BB		 475dnl #
476dnl # Enable if the SPL should be compiled with internal debugging enabled.
477dnl # By default this support is disabled.
478dnl #
57d86234 479AC_DEFUN([SPL_AC_DEBUG], [
c950d148 480 AC_MSG_CHECKING([whether debugging is enabled])
055ffd98
BB		 481 AC_ARG_ENABLE([debug],
482 [AS_HELP_STRING([--enable-debug],
483 [Enable generic debug support @<:@default=no@:>@])],
484 [],
485 [enable_debug=no])
486
487 AS_IF([test "x$enable_debug" = xyes],
c950d148 488 [
c950d148
BB		 489 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
490 DEBUG_CFLAGS="-DDEBUG -Werror"
3c208a54
BB		 491 DEBUG_SPL="_with_debug"
492 ], [
c950d148
BB		 493 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
494 DEBUG_CFLAGS="-DNDEBUG"
3c208a54 495 DEBUG_SPL="_without_debug"
c950d148 496 ])
055ffd98 497
c950d148 498 AC_SUBST(DEBUG_CFLAGS)
3c208a54 499 AC_SUBST(DEBUG_SPL)
055ffd98 500 AC_MSG_RESULT([$enable_debug])
57d86234 501])
502
4b2220f0
BB		 503dnl #
504dnl # Enabled by default it provides a basic debug log infrastructure.
505dnl # Each subsystem registers itself with a name and logs messages
506dnl # using predefined types. If the debug mask it set to allow the
507dnl # message type it will be written to the internal log. The log
508dnl # can be dumped to a file by echoing 1 to the 'dump' proc entry,
509dnl # after dumping the log it must be decoded using the spl utility.
510dnl #
511dnl # echo 1 >/proc/sys/kernel/spl/debug/dump
512dnl # spl /tmp/spl-log.xxx.yyy /tmp/spl-log.xxx.yyy.txt
513dnl #
514AC_DEFUN([SPL_AC_DEBUG_LOG], [
515 AC_ARG_ENABLE([debug-log],
516 [AS_HELP_STRING([--enable-debug-log],
517 [Enable basic debug logging @<:@default=yes@:>@])],
518 [],
519 [enable_debug_log=yes])
520
521 AS_IF([test "x$enable_debug_log" = xyes],
3c208a54
BB		 522 [
523 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_LOG"
524 DEBUG_LOG="_with_debug_log"
525 AC_DEFINE([DEBUG_LOG], [1],
4b2220f0 526 [Define to 1 to enable basic debug logging])
3c208a54
BB		 527 ], [
528 DEBUG_LOG="_without_debug_log"
529 ])
4b2220f0 530
3c208a54 531 AC_SUBST(DEBUG_LOG)
4b2220f0
BB		 532 AC_MSG_CHECKING([whether basic debug logging is enabled])
533 AC_MSG_RESULT([$enable_debug_log])
534])
535
055ffd98
BB		 536dnl #
537dnl # Enabled by default it provides a minimal level of memory tracking.
538dnl # A total count of bytes allocated is kept for each alloc and free.
539dnl # Then at module unload time a report to the console will be printed
540dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
541dnl # and provide an easy way to inspect the kmem based slab.
542dnl #
57d86234 543AC_DEFUN([SPL_AC_DEBUG_KMEM], [
055ffd98
BB		 544 AC_ARG_ENABLE([debug-kmem],
545 [AS_HELP_STRING([--enable-debug-kmem],
546 [Enable basic kmem accounting @<:@default=yes@:>@])],
547 [],
548 [enable_debug_kmem=yes])
57d86234 549
055ffd98 550 AS_IF([test "x$enable_debug_kmem" = xyes],
3c208a54
BB		 551 [
552 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
553 DEBUG_KMEM="_with_debug_kmem"
554 AC_DEFINE([DEBUG_KMEM], [1],
055ffd98 555 [Define to 1 to enable basic kmem accounting])
3c208a54
BB		 556 ], [
557 DEBUG_KMEM="_without_debug_kmem"
558 ])
055ffd98 559
3c208a54 560 AC_SUBST(DEBUG_KMEM)
055ffd98
BB		 561 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
562 AC_MSG_RESULT([$enable_debug_kmem])
57d86234 563])
564
055ffd98
BB		 565dnl #
566dnl # Disabled by default it provides detailed memory tracking. This
567dnl # feature also requires --enable-debug-kmem to be set. When enabled
568dnl # not only will total bytes be tracked but also the location of every
569dnl # alloc and free. When the SPL module is unloaded a list of all leaked
570dnl # addresses and where they were allocated will be dumped to the console.
571dnl # Enabling this feature has a significant impact on performance but it
572dnl # makes finding memory leaks pretty straight forward.
573dnl #
574AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
575 AC_ARG_ENABLE([debug-kmem-tracking],
576 [AS_HELP_STRING([--enable-debug-kmem-tracking],
577 [Enable detailed kmem tracking @<:@default=no@:>@])],
578 [],
579 [enable_debug_kmem_tracking=no])
580
581 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
3c208a54
BB		 582 [
583 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
584 DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
585 AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
055ffd98 586 [Define to 1 to enable detailed kmem tracking])
3c208a54
BB		 587 ], [
588 DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
589 ])
055ffd98 590
3c208a54 591 AC_SUBST(DEBUG_KMEM_TRACKING)
055ffd98
BB		 592 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
593 AC_MSG_RESULT([$enable_debug_kmem_tracking])
57d86234 594])
595
596dnl #
597dnl # SPL_LINUX_CONFTEST
598dnl #
599AC_DEFUN([SPL_LINUX_CONFTEST], [
dbe561d8 600cat confdefs.h - <<_ACEOF >conftest.c
57d86234 601$1
602_ACEOF
603])
604
605dnl #
606dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
607dnl #
608m4_define([SPL_LANG_PROGRAM], [
609$1
610int
611main (void)
612{
613dnl Do *not* indent the following line: there may be CPP directives.
614dnl Don't move the `;' right after for the same reason.
615$2
616 ;
617 return 0;
618}
619])
620
621dnl #
622dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
623dnl #
624AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
c5f70460 625 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
df7cc5bc 626 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
c5f70460 627 echo "obj-m := conftest.o" >build/Makefile
df7cc5bc
ED		 628 modpost_flag=''
629 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
c5f70460 630 AS_IF(
df7cc5bc
ED		 631 [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
632 [$4],
633 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
c5f70460
BB		 634 )
635 rm -Rf build
57d86234 636])
637
638dnl #
639dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
640dnl #
641AC_DEFUN([SPL_LINUX_TRY_COMPILE],
642 [SPL_LINUX_COMPILE_IFELSE(
d50bd9e2 643 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
644 [modules],
645 [test -s build/conftest.o],
646 [$3], [$4])
57d86234 647])
648
57d86234 649dnl #
650dnl # SPL_CHECK_SYMBOL_EXPORT
651dnl # check symbol exported or not
652dnl #
723aa3b0 653AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
2e0e7e69
BB		 654 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
655 $LINUX_OBJ/Module*.symvers 2>/dev/null
57d86234 656 rc=$?
657 if test $rc -ne 0; then
658 export=0
659 for file in $2; do
2e0e7e69
BB		 660 grep -q -E "EXPORT_SYMBOL.*($1)" \
661 "$LINUX_OBJ/$file" 2>/dev/null
57d86234 662 rc=$?
723aa3b0
ED		 663 if test $rc -eq 0; then
664 export=1
665 break;
666 fi
57d86234 667 done
723aa3b0 668 if test $export -eq 0; then :
57d86234 669 $4
723aa3b0 670 else :
57d86234 671 $3
672 fi
723aa3b0 673 else :
57d86234 674 $3
675 fi
676])
677
723aa3b0
ED		 678dnl #
679dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
680dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
681dnl # is called if not compiling for builtin
682dnl #
683AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
684 SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
685 if test $rc -ne 0; then :
686 $6
687 else
688 if test "x$enable_linux_builtin" != xyes; then
689 SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
690 fi
691 if test $rc -ne 0; then :
692 $6
693 else :
694 $5
695 fi
696 fi
697])
698
12ff95ff
BB		 699dnl #
700dnl # SPL_CHECK_SYMBOL_HEADER
701dnl # check if a symbol prototype is defined in listed headers.
702dnl #
703AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
704 AC_MSG_CHECKING([whether symbol $1 exists in header])
705 header=0
706 for file in $3; do
707 grep -q "$2" "$LINUX/$file" 2>/dev/null
708 rc=$?
723aa3b0
ED		 709 if test $rc -eq 0; then
710 header=1
711 break;
712 fi
12ff95ff
BB		 713 done
714 if test $header -eq 0; then
715 AC_MSG_RESULT([no])
716 $5
717 else
718 AC_MSG_RESULT([yes])
719 $4
720 fi
721])
722
86de8532 723dnl #
724dnl # SPL_CHECK_HEADER
725dnl # check whether header exists and define HAVE_$2_HEADER
726dnl #
727AC_DEFUN([SPL_CHECK_HEADER],
728 [AC_MSG_CHECKING([whether header $1 exists])
729 SPL_LINUX_TRY_COMPILE([
d50bd9e2 730 #include <$1>
86de8532 731 ],[
732 return 0;
733 ],[
734 AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
735 AC_MSG_RESULT(yes)
736 $3
737 ],[
738 AC_MSG_RESULT(no)
739 $4
740 ])
741])
6a6cafbe 742
0408008b
ED		 743dnl #
744dnl # Basic toolchain sanity check.
745dnl #
746AC_DEFUN([SPL_AC_TEST_MODULE],
747 [AC_MSG_CHECKING([whether modules can be built])
748 SPL_LINUX_TRY_COMPILE([],[],[
749 AC_MSG_RESULT([yes])
750 ],[
751 AC_MSG_RESULT([no])
752 if test "x$enable_linux_builtin" != xyes; then
753 AC_MSG_ERROR([*** Unable to build an empty module.])
754 else
755 AC_MSG_ERROR([
756 *** Unable to build an empty module.
757 *** Please run 'make scripts' inside the kernel source tree.])
758 fi
759 ])
760])
761
57d86234 762dnl #
d04c8a56
BB		 763dnl # Use the atomic implemenation based on global spinlocks. This
764dnl # should only be needed by 32-bit kernels which do not provide
765dnl # the atomic64_* API. It may be optionally enabled as a fallback
766dnl # if problems are observed with the direct mapping to the native
767dnl # Linux atomic operations. You may not disable atomic spinlocks
768dnl # if you kernel does not an atomic64_* API.
57d86234 769dnl #
d04c8a56
BB		 770AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
771 AC_ARG_ENABLE([atomic-spinlocks],
772 [AS_HELP_STRING([--enable-atomic-spinlocks],
773 [Atomic types use spinlocks @<:@default=check@:>@])],
774 [],
775 [enable_atomic_spinlocks=check])
57d86234 776
a0f6da3d 777 SPL_LINUX_TRY_COMPILE([
778 #include <asm/atomic.h>
779 ],[
03318641 780 atomic64_t *ptr __attribute__ ((unused));
a0f6da3d 781 ],[
d04c8a56 782 have_atomic64_t=yes
a0f6da3d 783 AC_DEFINE(HAVE_ATOMIC64_T, 1,
d04c8a56 784 [kernel defines atomic64_t])
a0f6da3d 785 ],[
d04c8a56
BB		 786 have_atomic64_t=no
787 ])
788
789 AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
790 AS_IF([test "x$have_atomic64_t" = xyes], [
791 enable_atomic_spinlocks=no
792 ],[
793 enable_atomic_spinlocks=yes
794 ])
a0f6da3d 795 ])
d04c8a56
BB		 796
797 AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
798 AC_DEFINE([ATOMIC_SPINLOCK], [1],
799 [Atomic types use spinlocks])
800 ],[
801 AS_IF([test "x$have_atomic64_t" = xno], [
802 AC_MSG_FAILURE(
803 [--disable-atomic-spinlocks given but required atomic64 support is unavailable])
804 ])
805 ])
806
807 AC_MSG_CHECKING([whether atomic types use spinlocks])
808 AC_MSG_RESULT([$enable_atomic_spinlocks])
809
810 AC_MSG_CHECKING([whether kernel defines atomic64_t])
811 AC_MSG_RESULT([$have_atomic64_t])
a0f6da3d 812])
813
302b88e6
BB		 814dnl #
815dnl # 2.6.24 API change,
816dnl # check if atomic64_cmpxchg is defined
817dnl #
818AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
819 [AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
820 SPL_LINUX_TRY_COMPILE([
821 #include <asm/atomic.h>
5ec44a37 822 #include <asm/system.h>
302b88e6
BB		 823 ],[
824 atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
825 ],[
826 AC_MSG_RESULT([yes])
827 AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
828 [kernel defines atomic64_cmpxchg])
829 ],[
830 AC_MSG_RESULT([no])
831 ])
832])
833
834dnl #
835dnl # 2.6.24 API change,
836dnl # check if atomic64_xchg is defined
837dnl #
838AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
839 [AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
840 SPL_LINUX_TRY_COMPILE([
841 #include <asm/atomic.h>
842 ],[
843 atomic64_xchg((atomic64_t *)NULL, 0);
844 ],[
845 AC_MSG_RESULT([yes])
846 AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
847 [kernel defines atomic64_xchg])
848 ],[
849 AC_MSG_RESULT([no])
850 ])
851])
852
d04c8a56
BB		 853dnl #
854dnl # 2.6.24 API change,
855dnl # check if uintptr_t typedef is defined
856dnl #
857AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
858 [AC_MSG_CHECKING([whether kernel defines uintptr_t])
859 SPL_LINUX_TRY_COMPILE([
860 #include <linux/types.h>
861 ],[
03318641 862 uintptr_t *ptr __attribute__ ((unused));
d04c8a56
BB		 863 ],[
864 AC_MSG_RESULT([yes])
865 AC_DEFINE(HAVE_UINTPTR_T, 1,
866 [kernel defines uintptr_t])
867 ],[
868 AC_MSG_RESULT([no])
869 ])
870])
871
57d86234 872dnl #
3d061e9d 873dnl # 2.6.20 API change,
57d86234 874dnl # INIT_WORK use 2 args and not store data inside
875dnl #
876AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
877 [AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
878 SPL_LINUX_TRY_COMPILE([
d50bd9e2 879 #include <linux/workqueue.h>
57d86234 880 ],[
03318641 881 struct work_struct work __attribute__ ((unused));
d50bd9e2 882 INIT_WORK(&work, NULL, NULL);
57d86234 883 ],[
d50bd9e2 884 AC_MSG_RESULT(yes)
885 AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
886 [INIT_WORK wants 3 args])
57d86234 887 ],[
d50bd9e2 888 AC_MSG_RESULT(no)
57d86234 889 ])
890])
891
892dnl #
3d061e9d 893dnl # 2.6.21 API change,
57d86234 894dnl # 'register_sysctl_table' use only one argument instead of two
895dnl #
896AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
897 [AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
898 SPL_LINUX_TRY_COMPILE([
d50bd9e2 899 #include <linux/sysctl.h>
57d86234 900 ],[
03318641 901 (void) register_sysctl_table(NULL, 0);
57d86234 902 ],[
d50bd9e2 903 AC_MSG_RESULT(yes)
904 AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
905 [register_sysctl_table() wants 2 args])
57d86234 906 ],[
d50bd9e2 907 AC_MSG_RESULT(no)
57d86234 908 ])
909])
910
57d86234 911dnl #
3d061e9d 912dnl # 2.6.23 API change
57d86234 913dnl # Old set_shrinker API replaced with register_shrinker
914dnl #
915AC_DEFUN([SPL_AC_SET_SHRINKER], [
916 AC_MSG_CHECKING([whether set_shrinker() available])
917 SPL_LINUX_TRY_COMPILE([
918 #include <linux/mm.h>
919 ],[
920 return set_shrinker(DEFAULT_SEEKS, NULL);
921 ],[
922 AC_MSG_RESULT([yes])
923 AC_DEFINE(HAVE_SET_SHRINKER, 1,
924 [set_shrinker() available])
925 ],[
926 AC_MSG_RESULT([no])
927 ])
928])
929
23aa63cb
BB		 930dnl #
931dnl # 2.6.35 API change,
932dnl # Add context to shrinker callback
933dnl #
934AC_DEFUN([SPL_AC_3ARGS_SHRINKER_CALLBACK],
935 [AC_MSG_CHECKING([whether shrinker callback wants 3 args])
936 tmp_flags="$EXTRA_KCFLAGS"
937 EXTRA_KCFLAGS="-Werror"
938 SPL_LINUX_TRY_COMPILE([
939 #include <linux/mm.h>
940
941 int shrinker_cb(struct shrinker *, int, unsigned int);
942 ],[
943 struct shrinker cache_shrinker = {
944 .shrink = shrinker_cb,
945 .seeks = DEFAULT_SEEKS,
946 };
947 register_shrinker(&cache_shrinker);
948 ],[
949 AC_MSG_RESULT(yes)
950 AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
951 [shrinker callback wants 3 args])
952 ],[
953 AC_MSG_RESULT(no)
954 ])
955 EXTRA_KCFLAGS="$tmp_flags"
956])
957
57d86234 958dnl #
3d061e9d 959dnl # 2.6.25 API change,
57d86234 960dnl # struct path entry added to struct nameidata
961dnl #
962AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
963 [AC_MSG_CHECKING([whether struct path used in struct nameidata])
964 SPL_LINUX_TRY_COMPILE([
d50bd9e2 965 #include <linux/namei.h>
57d86234 966 ],[
03318641 967 struct nameidata nd __attribute__ ((unused));
57d86234 968
969 nd.path.mnt = NULL;
970 nd.path.dentry = NULL;
971 ],[
d50bd9e2 972 AC_MSG_RESULT(yes)
973 AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
974 [struct path used in struct nameidata])
57d86234 975 ],[
d50bd9e2 976 AC_MSG_RESULT(no)
57d86234 977 ])
978])
979
980dnl #
981dnl # Custom SPL patch may export this system it is not required
982dnl #
723aa3b0
ED		 983AC_DEFUN([SPL_AC_TASK_CURR],
984 [AC_MSG_CHECKING([whether task_curr() is available])
985 SPL_LINUX_TRY_COMPILE_SYMBOL([
986 #include <linux/sched.h>
987 ], [
988 task_curr(NULL);
989 ], [task_curr], [kernel/sched.c], [
990 AC_MSG_RESULT(yes)
991 AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() is available])
992 ], [
993 AC_MSG_RESULT(no)
994 ])
57d86234 995])
996
997dnl #
3d061e9d 998dnl # 2.6.19 API change,
57d86234 999dnl # Use CTL_UNNUMBERED when binary sysctl is not required
1000dnl #
1001AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
1002 [AC_MSG_CHECKING([whether unnumbered sysctl support exists])
1003 SPL_LINUX_TRY_COMPILE([
d50bd9e2 1004 #include <linux/sysctl.h>
57d86234 1005 ],[
1006 #ifndef CTL_UNNUMBERED
1007 #error CTL_UNNUMBERED undefined
1008 #endif
1009 ],[
d50bd9e2 1010 AC_MSG_RESULT(yes)
1011 AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
1012 [unnumbered sysctl support exists])
57d86234 1013 ],[
d50bd9e2 1014 AC_MSG_RESULT(no)
57d86234 1015 ])
1016])
877a32e9 1017
79a3bf13
BB		 1018dnl #
1019dnl # 2.6.33 API change,
1020dnl # Removed .ctl_name from struct ctl_table.
1021dnl #
1022AC_DEFUN([SPL_AC_CTL_NAME], [
1023 AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
1024 SPL_LINUX_TRY_COMPILE([
1025 #include <linux/sysctl.h>
1026 ],[
03318641 1027 struct ctl_table ctl __attribute__ ((unused));
79a3bf13
BB		 1028 ctl.ctl_name = 0;
1029 ],[
1030 AC_MSG_RESULT(yes)
1031 AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
1032 ],[
1033 AC_MSG_RESULT(no)
1034 ])
1035])
1036
877a32e9 1037dnl #
1038dnl # 2.6.16 API change.
1039dnl # Check if 'fls64()' is available
1040dnl #
1041AC_DEFUN([SPL_AC_FLS64],
6a6cafbe 1042 [AC_MSG_CHECKING([whether fls64() is available])
1043 SPL_LINUX_TRY_COMPILE([
1044 #include <linux/bitops.h>
1045 ],[
1046 return fls64(0);
1047 ],[
1048 AC_MSG_RESULT(yes)
1049 AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
1050 ],[
1051 AC_MSG_RESULT(no)
1052 ])
877a32e9 1053])
46c685d0 1054
1055dnl #
1056dnl # 2.6.18 API change, check whether device_create() is available.
1057dnl # Device_create() was introduced in 2.6.18 and depricated
1058dnl # class_device_create() which was fully removed in 2.6.26.
1059dnl #
723aa3b0
ED		 1060AC_DEFUN([SPL_AC_DEVICE_CREATE],
1061 [AC_MSG_CHECKING([whether device_create() is available])
1062 SPL_CHECK_SYMBOL_EXPORT([device_create], [drivers/base/core.c], [
1063 AC_MSG_RESULT(yes)
1064 AC_DEFINE(HAVE_DEVICE_CREATE, 1,
1065 [device_create() is available])
1066 ], [
1067 AC_MSG_RESULT(no)
1068 ])
46c685d0 1069])
1070
8123ac4f
BB		 1071dnl #
1072dnl # 2.6.27 API change,
1073dnl # device_create() uses 5 args, new 'drvdata' argument.
1074dnl #
1075AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
1076 AC_MSG_CHECKING([whether device_create() wants 5 args])
1077 tmp_flags="$EXTRA_KCFLAGS"
1078 EXTRA_KCFLAGS="-Werror"
1079 SPL_LINUX_TRY_COMPILE([
1080 #include <linux/device.h>
1081 ],[
1082 device_create(NULL, NULL, 0, NULL, "%d", 1);
1083 ],[
1084 AC_MSG_RESULT(yes)
1085 AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
1086 [device_create wants 5 args])
1087 ],[
1088 AC_MSG_RESULT(no)
1089 ])
1090 EXTRA_KCFLAGS="$tmp_flags"
1091])
1092
46c685d0 1093dnl #
1094dnl # 2.6.13 API change, check whether class_device_create() is available.
1095dnl # Class_device_create() was introduced in 2.6.13 and depricated
1096dnl # class_simple_device_add() which was fully removed in 2.6.13.
1097dnl #
723aa3b0
ED		 1098AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE],
1099 [AC_MSG_CHECKING([whether class_device_create() is available])
1100 SPL_LINUX_TRY_COMPILE_SYMBOL([
1101 #include <linux/device.h>
1102 ], [
1103 class_device_create(NULL, NULL, 0, NULL, NULL);
1104 ], [class_device_create], [drivers/base/class.c], [
1105 AC_MSG_RESULT(yes)
1106 AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
1107 [class_device_create() is available])
1108 ], [
1109 AC_MSG_RESULT(no)
1110 ])
46c685d0 1111])
6a6cafbe 1112
6a6cafbe 1113dnl #
1114dnl # 2.6.26 API change, set_normalized_timespec() is exported.
1115dnl #
723aa3b0
ED		 1116AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT],
1117 [AC_MSG_CHECKING([whether set_normalized_timespec() is available as export])
1118 SPL_LINUX_TRY_COMPILE_SYMBOL([
1119 #include <linux/time.h>
1120 ], [
1121 set_normalized_timespec(NULL, 0, 0);
1122 ], [set_normalized_timespec], [kernel/time.c], [
1123 AC_MSG_RESULT(yes)
1124 AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
1125 [set_normalized_timespec() is available as export])
1126 ], [
1127 AC_MSG_RESULT(no)
1128 ])
6a6cafbe 1129])
1130
1131dnl #
1132dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
1133dnl # previously it was available in time.h as an inline.
1134dnl #
86de8532 1135AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
1136 AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
6a6cafbe 1137 SPL_LINUX_TRY_COMPILE([
1138 #include <linux/time.h>
6a6cafbe 1139 void set_normalized_timespec(struct timespec *ts,
25557fd8 1140 time_t sec, long nsec) { }
1141 ],
1142 [],
1143 [
6a6cafbe 1144 AC_MSG_RESULT(no)
1145 ],[
1146 AC_MSG_RESULT(yes)
1147 AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
1148 [set_normalized_timespec() is available as inline])
1149 ])
1150])
1151
1152dnl #
1153dnl # 2.6.18 API change,
1154dnl # timespec_sub() inline function available in linux/time.h
1155dnl #
86de8532 1156AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
1157 AC_MSG_CHECKING([whether timespec_sub() is available])
6a6cafbe 1158 SPL_LINUX_TRY_COMPILE([
1159 #include <linux/time.h>
1160 ],[
03318641
BB		 1161 struct timespec a = { 0 };
1162 struct timespec b = { 0 };
1163 struct timespec c __attribute__ ((unused));
6a6cafbe 1164 c = timespec_sub(a, b);
1165 ],[
1166 AC_MSG_RESULT(yes)
1167 AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
1168 ],[
1169 AC_MSG_RESULT(no)
1170 ])
1171])
1172
86de8532 1173dnl #
3d061e9d 1174dnl # 2.6.19 API change,
1175dnl # check if init_utsname() is available in linux/utsname.h
1176dnl #
1177AC_DEFUN([SPL_AC_INIT_UTSNAME], [
1178 AC_MSG_CHECKING([whether init_utsname() is available])
1179 SPL_LINUX_TRY_COMPILE([
1180 #include <linux/utsname.h>
1181 ],[
03318641
BB		 1182 struct new_utsname *a __attribute__ ((unused));
1183 a = init_utsname();
3d061e9d 1184 ],[
1185 AC_MSG_RESULT(yes)
1186 AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
1187 ],[
1188 AC_MSG_RESULT(no)
1189 ])
1190])
1191
1192dnl #
1193dnl # 2.6.26 API change,
1194dnl # definition of struct fdtable relocated to linux/fdtable.h
86de8532 1195dnl #
1196AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
1197 SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
1198])
322640b7 1199
1200dnl #
3d061e9d 1201dnl # 2.6.14 API change,
1202dnl # check whether 'files_fdtable()' exists
1203dnl #
1204AC_DEFUN([SPL_AC_FILES_FDTABLE], [
1205 AC_MSG_CHECKING([whether files_fdtable() is available])
1206 SPL_LINUX_TRY_COMPILE([
1207 #include <linux/sched.h>
1208 #include <linux/file.h>
1209 #ifdef HAVE_FDTABLE_HEADER
1210 #include <linux/fdtable.h>
1211 #endif
1212 ],[
1213 struct files_struct *files = current->files;
03318641
BB		 1214 struct fdtable *fdt __attribute__ ((unused));
1215 fdt = files_fdtable(files);
3d061e9d 1216 ],[
1217 AC_MSG_RESULT(yes)
1218 AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
1219 ],[
1220 AC_MSG_RESULT(no)
1221 ])
1222])
1223
e0093fea
RY		 1224dnl #
1225dnl # 3.4.0 API change,
1226dnl # check whether '__clear_close_on_exec()' exists
1227dnl #
1228AC_DEFUN([SPL_AC_CLEAR_CLOSE_ON_EXEC], [
1229 AC_MSG_CHECKING([whether __clear_close_on_exec() is available])
1230 SPL_LINUX_TRY_COMPILE([
1231 #include <linux/fdtable.h>
1232 ],[
1233 struct fdtable *fdt = NULL;
1234 int fd = 0;
1235
1236 __clear_close_on_exec(fd, fdt);
1237 ],[
1238 AC_MSG_RESULT(yes)
1239 AC_DEFINE(HAVE_CLEAR_CLOSE_ON_EXEC, 1,
1240 [__clear_close_on_exec() is available])
1241 ],[
1242 AC_MSG_RESULT(no)
1243 ])
1244])
1245
3d061e9d 1246dnl #
1247dnl # 2.6.18 API change,
1248dnl # added linux/uaccess.h
322640b7 1249dnl #
1250AC_DEFUN([SPL_AC_UACCESS_HEADER], [
1251 SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
1252])
3d061e9d 1253
1254dnl #
1255dnl # 2.6.12 API change,
1256dnl # check whether 'kmalloc_node()' is available.
1257dnl #
1258AC_DEFUN([SPL_AC_KMALLOC_NODE], [
1259 AC_MSG_CHECKING([whether kmalloc_node() is available])
1260 SPL_LINUX_TRY_COMPILE([
1261 #include <linux/slab.h>
1262 ],[
03318641
BB		 1263 void *a __attribute__ ((unused));
1264 a = kmalloc_node(1, GFP_KERNEL, 0);
3d061e9d 1265 ],[
1266 AC_MSG_RESULT(yes)
1267 AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
1268 ],[
1269 AC_MSG_RESULT(no)
1270 ])
1271])
1272
1273dnl #
1274dnl # 2.6.9 API change,
1275dnl # check whether 'monotonic_clock()' is available it may
1276dnl # be available for some archs but not others.
1277dnl #
723aa3b0
ED		 1278AC_DEFUN([SPL_AC_MONOTONIC_CLOCK],
1279 [AC_MSG_CHECKING([whether monotonic_clock() is available])
1280 SPL_LINUX_TRY_COMPILE_SYMBOL([
1281 #include <linux/timex.h>
1282 ], [
1283 monotonic_clock();
1284 ], [monotonic_clock], [], [
1285 AC_MSG_RESULT(yes)
1286 AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
1287 [monotonic_clock() is available])
1288 ], [
1289 AC_MSG_RESULT(no)
1290 ])
3d061e9d 1291])
1292
1293dnl #
1294dnl # 2.6.16 API change,
1295dnl # check whether 'struct inode' has i_mutex
1296dnl #
1297AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
1298 AC_MSG_CHECKING([whether struct inode has i_mutex])
1299 SPL_LINUX_TRY_COMPILE([
1300 #include <linux/fs.h>
1301 #include <linux/mutex.h>
1302 ],[
1303 struct inode i;
1304 mutex_init(&i.i_mutex);
1305 ],[
1306 AC_MSG_RESULT(yes)
1307 AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
1308 ],[
1309 AC_MSG_RESULT(no)
1310 ])
1311])
b61a6e8b 1312
4d54fdee
BB		 1313dnl #
1314dnl # 2.6.29 API change,
1315dnl # Adaptive mutexs introduced.
1316dnl #
1317AC_DEFUN([SPL_AC_MUTEX_OWNER], [
1318 AC_MSG_CHECKING([whether struct mutex has owner])
1319 SPL_LINUX_TRY_COMPILE([
1320 #include <linux/mutex.h>
1321 ],[
03318641 1322 struct mutex mtx __attribute__ ((unused));
4d54fdee
BB		 1323 mtx.owner = NULL;
1324 ],[
1325 AC_MSG_RESULT(yes)
1326 AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
1327 ],[
1328 AC_MSG_RESULT(no)
1329 ])
1330])
1331
86fd39f3
BB		 1332dnl #
1333dnl # 2.6.39 API change,
1334dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
1335dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
1336dnl # was defined. As of 2.6.39 this was changed to a task_struct
1337dnl # pointer which frankly makes a lot more sense.
1338dnl #
1339AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
1340 AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
1341 tmp_flags="$EXTRA_KCFLAGS"
1342 EXTRA_KCFLAGS="-Werror"
1343 SPL_LINUX_TRY_COMPILE([
1344 #include <linux/mutex.h>
1345 ],[
1346 struct mutex mtx __attribute__ ((unused));
1347 mtx.owner = current;
1348 ],[
1349 AC_MSG_RESULT(yes)
1350 AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
1351 [struct mutex owner is a task_struct])
1352 ],[
1353 AC_MSG_RESULT(no)
1354 ])
1355 EXTRA_KCFLAGS="$tmp_flags"
1356])
1357
6c9433c1
BB		 1358dnl #
1359dnl # 2.6.18 API change,
1360dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
1361dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
1362dnl # if the mutex validator is disabled or otherwise unavailable.
1363dnl #
1364AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
1365 AC_MSG_CHECKING([whether mutex_lock_nested() is available])
1366 SPL_LINUX_TRY_COMPILE([
1367 #include <linux/mutex.h>
1368 ],[
1369 struct mutex mutex;
1370 mutex_init(&mutex);
1371 mutex_lock_nested(&mutex, 0);
1372 ],[
1373 AC_MSG_RESULT(yes)
1374 AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
1375 [mutex_lock_nested() is available])
1376 ],[
1377 AC_MSG_RESULT(no)
1378 ])
1379])
1380
31a033ec
BB		 1381dnl #
1382dnl # 2.6.27 API change,
1383dnl # on_each_cpu() uses 3 args, no 'retry' argument
1384dnl #
1385AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
1386 AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
1387 SPL_LINUX_TRY_COMPILE([
1388 #include <linux/smp.h>
1389 ],[
1390 on_each_cpu(NULL, NULL, 0);
1391 ],[
1392 AC_MSG_RESULT(yes)
1393 AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
1394 [on_each_cpu wants 3 args])
1395 ],[
1396 AC_MSG_RESULT(no)
1397 ])
1398])
36b313da
BB		 1399
1400dnl #
d1ff2312
BB		 1401dnl # 2.6.18 API change,
1402dnl # kallsyms_lookup_name no longer exported
1403dnl #
723aa3b0
ED		 1404AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME],
1405 [AC_MSG_CHECKING([whether kallsyms_lookup_name() is available])
1406 SPL_LINUX_TRY_COMPILE_SYMBOL([
1407 #include <linux/kallsyms.h>
1408 ], [
1409 kallsyms_lookup_name(NULL);
1410 ], [kallsyms_lookup_name], [], [
1411 AC_MSG_RESULT(yes)
1412 AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1413 [kallsyms_lookup_name() is available])
1414 ], [
1415 AC_MSG_RESULT(no)
1416 ])
d1ff2312
BB		 1417])
1418
1419dnl #
e11d6c5f
BB		 1420dnl # Proposed API change,
1421dnl # This symbol is not available in stock kernels. You may build a
1422dnl # custom kernel with the *-spl-export-symbols.patch which will export
1423dnl # these symbols for use. If your already rolling a custom kernel for
1424dnl # your environment this is recommended.
d1ff2312 1425dnl #
723aa3b0
ED		 1426AC_DEFUN([SPL_AC_GET_VMALLOC_INFO],
1427 [AC_MSG_CHECKING([whether get_vmalloc_info() is available])
1428 SPL_CHECK_SYMBOL_EXPORT([get_vmalloc_info], [], [
1429 AC_MSG_RESULT(yes)
1430 AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
1431 [get_vmalloc_info() is available])
1432 ], [
1433 AC_MSG_RESULT(no)
1434 ])
d1ff2312
BB		 1435])
1436
5232d256
BB		 1437dnl #
1438dnl # 2.6.17 API change
1439dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
1440dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
1441dnl # were exported in 2.6.17 for use by modules which was consistent with
1442dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
1443dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
1444dnl # were dropped entirely leaving modules no way to directly iterate over
1445dnl # the zone list. Because we need access to the zone helpers we check
1446dnl # if the kernel contains the old or new implementation. Then we check
1447dnl # to see if the symbols we need for each version are available. If they
1448dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
1449dnl #
1450AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
1451 AC_MSG_CHECKING([whether symbol *_pgdat exist])
1452 grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
1453 rc=$?
1454 if test $rc -eq 0; then
1455 AC_MSG_RESULT([yes])
723aa3b0 1456 AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
5232d256
BB		 1457 else
1458 AC_MSG_RESULT([no])
1459 fi
1460])
1461
d1ff2312 1462dnl #
e11d6c5f
BB		 1463dnl # Proposed API change,
1464dnl # This symbol is not available in stock kernels. You may build a
1465dnl # custom kernel with the *-spl-export-symbols.patch which will export
1466dnl # these symbols for use. If your already rolling a custom kernel for
1467dnl # your environment this is recommended.
36b313da 1468dnl #
723aa3b0
ED		 1469AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT],
1470 [AC_MSG_CHECKING([whether first_online_pgdat() is available])
1471 SPL_LINUX_TRY_COMPILE_SYMBOL([
1472 #include <linux/mmzone.h>
1473 ], [
1474 first_online_pgdat();
1475 ], [first_online_pgdat], [], [
1476 AC_MSG_RESULT(yes)
1477 AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
1478 [first_online_pgdat() is available])
1479 ], [
1480 AC_MSG_RESULT(no)
1481 ])
36b313da
BB		 1482])
1483
1484dnl #
e11d6c5f
BB		 1485dnl # Proposed API change,
1486dnl # This symbol is not available in stock kernels. You may build a
1487dnl # custom kernel with the *-spl-export-symbols.patch which will export
1488dnl # these symbols for use. If your already rolling a custom kernel for
1489dnl # your environment this is recommended.
36b313da 1490dnl #
723aa3b0
ED		 1491AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT],
1492 [AC_MSG_CHECKING([whether next_online_pgdat() is available])
1493 SPL_LINUX_TRY_COMPILE_SYMBOL([
1494 #include <linux/mmzone.h>
1495 ], [
1496 next_online_pgdat(NULL);
1497 ], [next_online_pgdat], [], [
1498 AC_MSG_RESULT(yes)
1499 AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
1500 [next_online_pgdat() is available])
1501 ], [
1502 AC_MSG_RESULT(no)
1503 ])
36b313da
BB		 1504])
1505
1506dnl #
e11d6c5f
BB		 1507dnl # Proposed API change,
1508dnl # This symbol is not available in stock kernels. You may build a
1509dnl # custom kernel with the *-spl-export-symbols.patch which will export
1510dnl # these symbols for use. If your already rolling a custom kernel for
1511dnl # your environment this is recommended.
36b313da 1512dnl #
723aa3b0
ED		 1513AC_DEFUN([SPL_AC_NEXT_ZONE],
1514 [AC_MSG_CHECKING([whether next_zone() is available])
1515 SPL_LINUX_TRY_COMPILE_SYMBOL([
1516 #include <linux/mmzone.h>
1517 ], [
1518 next_zone(NULL);
1519 ], [next_zone], [], [
1520 AC_MSG_RESULT(yes)
1521 AC_DEFINE(HAVE_NEXT_ZONE, 1, [next_zone() is available])
1522 ], [
1523 AC_MSG_RESULT(no)
1524 ])
36b313da 1525])
4ab13d3b 1526
5232d256
BB		 1527dnl #
1528dnl # 2.6.17 API change,
1529dnl # See SPL_AC_PGDAT_HELPERS for details.
1530dnl #
723aa3b0
ED		 1531AC_DEFUN([SPL_AC_PGDAT_LIST],
1532 [AC_MSG_CHECKING([whether pgdat_list is available])
1533 SPL_LINUX_TRY_COMPILE_SYMBOL([
1534 #include <linux/topology.h>
1535 pg_data_t *tmp = pgdat_list;
1536 ], [], [pgdat_list], [], [
1537 AC_MSG_RESULT(yes)
1538 AC_DEFINE(HAVE_PGDAT_LIST, 1, [pgdat_list is available])
1539 ], [
1540 AC_MSG_RESULT(no)
1541 ])
5232d256
BB		 1542])
1543
96dded38
BB		 1544dnl #
1545dnl # 2.6.18 API change,
1546dnl # First introduced global_page_state() support as an inline.
1547dnl #
1548AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
1549 AC_MSG_CHECKING([whether global_page_state() is available])
1550 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1551 #include <linux/mm.h>
96dded38 1552 ],[
03318641 1553 unsigned long state __attribute__ ((unused));
6ae7fef5 1554 state = global_page_state(0);
96dded38
BB		 1555 ],[
1556 AC_MSG_RESULT(yes)
1557 AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
1558 [global_page_state() is available])
1559 ],[
1560 AC_MSG_RESULT(no)
1561 ])
1562])
1563
e11d6c5f 1564dnl #
6ae7fef5
BB		 1565dnl # 2.6.21 API change (plus subsequent naming convention changes),
1566dnl # Public global zone stats now include a free page count. However
1567dnl # the enumerated names of the counters have changed since this API
1568dnl # was introduced. We need to deduce the corrent name to use. This
1569dnl # replaces the priviate get_zone_counts() interface.
1570dnl #
1571dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
1572dnl # is 2.6.30 as of when this was written.
e11d6c5f 1573dnl #
6ae7fef5
BB		 1574AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
1575 AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
e11d6c5f 1576 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1577 #include <linux/mm.h>
e11d6c5f 1578 ],[
03318641 1579 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5 1580 zsi = NR_FREE_PAGES;
e11d6c5f
BB		 1581 ],[
1582 AC_MSG_RESULT(yes)
6ae7fef5
BB		 1583 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
1584 [Page state NR_FREE_PAGES is available])
e11d6c5f
BB		 1585 ],[
1586 AC_MSG_RESULT(no)
1587 ])
1588])
a093c6a4 1589
6ae7fef5
BB		 1590dnl #
1591dnl # 2.6.21 API change (plus subsequent naming convention changes),
1592dnl # Public global zone stats now include an inactive page count. However
1593dnl # the enumerated names of the counters have changed since this API
1594dnl # was introduced. We need to deduce the corrent name to use. This
1595dnl # replaces the priviate get_zone_counts() interface.
1596dnl #
1597dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
1598dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
1599dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
1600dnl #
1601AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
1602 AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
1603 SPL_LINUX_TRY_COMPILE([
1604 #include <linux/mm.h>
1605 ],[
03318641 1606 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1607 zsi = NR_INACTIVE;
1608 ],[
1609 AC_MSG_RESULT(yes)
1610 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
1611 [Page state NR_INACTIVE is available])
1612 ],[
1613 AC_MSG_RESULT(no)
1614 ])
1615
1616 AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
1617 SPL_LINUX_TRY_COMPILE([
1618 #include <linux/mm.h>
1619 ],[
03318641 1620 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1621 zsi = NR_INACTIVE_ANON;
1622 ],[
1623 AC_MSG_RESULT(yes)
1624 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
1625 [Page state NR_INACTIVE_ANON is available])
1626 ],[
1627 AC_MSG_RESULT(no)
1628 ])
1629
1630 AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
1631 SPL_LINUX_TRY_COMPILE([
1632 #include <linux/mm.h>
1633 ],[
03318641 1634 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1635 zsi = NR_INACTIVE_FILE;
1636 ],[
1637 AC_MSG_RESULT(yes)
1638 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
1639 [Page state NR_INACTIVE_FILE is available])
1640 ],[
1641 AC_MSG_RESULT(no)
1642 ])
1643])
1644
1645dnl #
1646dnl # 2.6.21 API change (plus subsequent naming convention changes),
1647dnl # Public global zone stats now include an active page count. However
1648dnl # the enumerated names of the counters have changed since this API
1649dnl # was introduced. We need to deduce the corrent name to use. This
1650dnl # replaces the priviate get_zone_counts() interface.
1651dnl #
1652dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
1653dnl # anonymous and file active pages. As of 2.6.28 it was split in
1654dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
1655dnl #
1656AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
1657 AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
1658 SPL_LINUX_TRY_COMPILE([
1659 #include <linux/mm.h>
1660 ],[
03318641 1661 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1662 zsi = NR_ACTIVE;
1663 ],[
1664 AC_MSG_RESULT(yes)
1665 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
1666 [Page state NR_ACTIVE is available])
1667 ],[
1668 AC_MSG_RESULT(no)
1669 ])
1670
1671 AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
1672 SPL_LINUX_TRY_COMPILE([
1673 #include <linux/mm.h>
1674 ],[
03318641 1675 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1676 zsi = NR_ACTIVE_ANON;
1677 ],[
1678 AC_MSG_RESULT(yes)
1679 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
1680 [Page state NR_ACTIVE_ANON is available])
1681 ],[
1682 AC_MSG_RESULT(no)
1683 ])
1684
1685 AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
1686 SPL_LINUX_TRY_COMPILE([
1687 #include <linux/mm.h>
1688 ],[
03318641 1689 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1690 zsi = NR_ACTIVE_FILE;
1691 ],[
1692 AC_MSG_RESULT(yes)
1693 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
1694 [Page state NR_ACTIVE_FILE is available])
1695 ],[
1696 AC_MSG_RESULT(no)
1697 ])
1698])
1699
1700dnl #
1701dnl # Proposed API change for legacy kernels.
1702dnl # This symbol is not available in older kernels. For kernels post
1703dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
1704dnl # page state information. This symbol is only used in legacy kernels
1705dnl # any only as a last resort.
1706dnl
1707AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
1708 AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
1709 SPL_LINUX_TRY_COMPILE([
1710 ],[
1711 #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
1712 #error "global_page_state needs NR_FREE_PAGES"
1713 #endif
1714
1715 #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
1716 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
1717 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
1718 #error "global_page_state needs NR_ACTIVE*"
1719 #endif
1720
1721 #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
1722 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
1723 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
1724 #error "global_page_state needs NR_INACTIVE*"
1725 #endif
1726 ],[
1727 AC_MSG_RESULT(no)
1728 ],[
1729 AC_MSG_RESULT(yes)
1730 AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
1731 [get_zone_counts() is needed])
1732
723aa3b0
ED		 1733 AC_MSG_CHECKING([whether get_zone_counts() is available])
1734 SPL_LINUX_TRY_COMPILE_SYMBOL([
1735 #include <linux/mmzone.h>
1736 ], [
1737 get_zone_counts(NULL, NULL, NULL);
1738 ], [get_zone_counts], [], [
1739 AC_MSG_RESULT(yes)
1740 AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
1741 [get_zone_counts() is available])
1742 ], [
1743 AC_MSG_RESULT(no)
1744 ])
6ae7fef5
BB		 1745 ])
1746])
1747
7119bf70
BB		 1748dnl #
1749dnl # 2.6.27 API change,
1750dnl # The user_path_dir() replaces __user_walk()
1751dnl #
723aa3b0
ED		 1752AC_DEFUN([SPL_AC_USER_PATH_DIR],
1753 [AC_MSG_CHECKING([whether user_path_dir() is available])
1754 SPL_LINUX_TRY_COMPILE_SYMBOL([
1755 #include <linux/fcntl.h>
1756 #include <linux/namei.h>
1757 ], [
1758 user_path_dir(NULL, NULL);
1759 ], [user_path_at], [], [
1760 AC_MSG_RESULT(yes)
1761 AC_DEFINE(HAVE_USER_PATH_DIR, 1, [user_path_dir() is available])
1762 ], [
1763 AC_MSG_RESULT(no)
1764 ])
7119bf70
BB		 1765])
1766
51a727e9
BB		 1767dnl #
1768dnl # Symbol available in RHEL kernels not in stock kernels.
1769dnl #
723aa3b0
ED		 1770AC_DEFUN([SPL_AC_SET_FS_PWD],
1771 [AC_MSG_CHECKING([whether set_fs_pwd() is available])
1772 SPL_LINUX_TRY_COMPILE_SYMBOL([
1773 #include <linux/spinlock.h>
1774 #include <linux/fs_struct.h>
1775 ], [
1776 (void) set_fs_pwd;
1777 ], [set_fs_pwd], [], [
1778 AC_MSG_RESULT(yes)
1779 AC_DEFINE(HAVE_SET_FS_PWD, 1, [set_fs_pwd() is available])
1780 ], [
1781 AC_MSG_RESULT(no)
1782 ])
51a727e9
BB		 1783])
1784
1785dnl #
1786dnl # 2.6.25 API change,
1787dnl # Simplied API by replacing mnt+dentry args with a single path arg.
1788dnl #
1789AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
1790 [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
1791 SPL_LINUX_TRY_COMPILE([
1792 #include <linux/sched.h>
baf2979e 1793 #include <linux/fs_struct.h>
51a727e9
BB		 1794 ],[
1795 set_fs_pwd(NULL, NULL);
1796 ],[
1797 AC_MSG_RESULT(yes)
1798 AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
1799 [set_fs_pwd() wants 2 args])
1800 ],[
1801 AC_MSG_RESULT(no)
1802 ])
1803])
1804
a093c6a4
BB		 1805dnl #
1806dnl # SLES API change, never adopted in mainline,
1807dnl # Third 'struct vfsmount *' argument removed.
1808dnl #
1809AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
1810 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
1811 SPL_LINUX_TRY_COMPILE([
1812 #include <linux/fs.h>
1813 ],[
1814 vfs_unlink(NULL, NULL);
1815 ],[
1816 AC_MSG_RESULT(yes)
1817 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
1818 [vfs_unlink() wants 2 args])
1819 ],[
1820 AC_MSG_RESULT(no)
1821 ])
1822])
1823
1824dnl #
1825dnl # SLES API change, never adopted in mainline,
1826dnl # Third and sixth 'struct vfsmount *' argument removed.
1827dnl #
1828AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
1829 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
1830 SPL_LINUX_TRY_COMPILE([
1831 #include <linux/fs.h>
1832 ],[
1833 vfs_rename(NULL, NULL, NULL, NULL);
1834 ],[
1835 AC_MSG_RESULT(yes)
1836 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
1837 [vfs_rename() wants 4 args])
1838 ],[
1839 AC_MSG_RESULT(no)
1840 ])
1841])
ec7d53e9 1842
9b2048c2
BB		 1843dnl #
1844dnl # 2.6.36 API change,
1845dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
1846dnl # a spinlock_t to improve the fastpath performance.
1847dnl #
1848AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
1849 AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
97fd6a07
BB		 1850 tmp_flags="$EXTRA_KCFLAGS"
1851 EXTRA_KCFLAGS="-Werror"
9b2048c2
BB		 1852 SPL_LINUX_TRY_COMPILE([
1853 #include <linux/sched.h>
1854 #include <linux/fs_struct.h>
1855 ],[
1856 struct fs_struct fs;
1857 spin_lock_init(&fs.lock);
1858 ],[
1859 AC_MSG_RESULT(yes)
1860 AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
1861 [struct fs_struct uses spinlock_t])
1862 ],[
1863 AC_MSG_RESULT(no)
1864 ])
97fd6a07 1865 EXTRA_KCFLAGS="$tmp_flags"
9b2048c2
BB		 1866])
1867
ec7d53e9
BB		 1868dnl #
1869dnl # 2.6.29 API change,
1870dnl # check whether 'struct cred' exists
1871dnl #
1872AC_DEFUN([SPL_AC_CRED_STRUCT], [
1873 AC_MSG_CHECKING([whether struct cred exists])
1874 SPL_LINUX_TRY_COMPILE([
1875 #include <linux/cred.h>
1876 ],[
03318641 1877 struct cred *cr __attribute__ ((unused));
ec7d53e9
BB		 1878 cr = NULL;
1879 ],[
1880 AC_MSG_RESULT(yes)
1881 AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
1882 ],[
1883 AC_MSG_RESULT(no)
1884 ])
1885])
1886
1887dnl #
e811949a 1888dnl # Custom SPL patch may export this symbol.
ec7d53e9 1889dnl #
723aa3b0
ED		 1890AC_DEFUN([SPL_AC_GROUPS_SEARCH],
1891 [AC_MSG_CHECKING([whether groups_search() is available])
1892 SPL_LINUX_TRY_COMPILE_SYMBOL([
1893 #include <linux/cred.h>
1894 ], [
1895 groups_search(NULL, 0);
1896 ], [groups_search], [], [
1897 AC_MSG_RESULT(yes)
1898 AC_DEFINE(HAVE_GROUPS_SEARCH, 1, [groups_search() is available])
1899 ], [
1900 AC_MSG_RESULT(no)
1901 ])
ec7d53e9 1902])
e811949a
BB		 1903
1904dnl #
1905dnl # 2.6.x API change,
1906dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
1907dnl #
723aa3b0
ED		 1908AC_DEFUN([SPL_AC_PUT_TASK_STRUCT],
1909 [AC_MSG_CHECKING([whether __put_task_struct() is available])
1910 SPL_LINUX_TRY_COMPILE_SYMBOL([
1911 #include <linux/sched.h>
1912 ], [
1913 __put_task_struct(NULL);
1914 ], [__put_task_struct], [], [
1915 AC_MSG_RESULT(yes)
1916 AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
1917 [__put_task_struct() is available])
1918 ], [
1919 AC_MSG_RESULT(no)
1920 ])
e811949a 1921])
3977f837
BB		 1922
1923dnl #
1924dnl # 2.6.32 API change,
1925dnl # Unused 'struct file *' removed from prototype.
1926dnl #
1927AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
1928 AC_MSG_CHECKING([whether proc_handler() wants 5 args])
1929 SPL_LINUX_TRY_COMPILE([
1930 #include <linux/sysctl.h>
1931 ],[
1932 proc_dostring(NULL, 0, NULL, NULL, NULL);
1933 ],[
1934 AC_MSG_RESULT(yes)
1935 AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
1936 [proc_handler() wants 5 args])
1937 ],[
1938 AC_MSG_RESULT(no)
1939 ])
1940])
b868e22f
BB		 1941
1942dnl #
1943dnl # 2.6.x API change,
1944dnl # kvasprintf() function added.
1945dnl #
723aa3b0
ED		 1946AC_DEFUN([SPL_AC_KVASPRINTF],
1947 [AC_MSG_CHECKING([whether kvasprintf() is available])
1948 SPL_LINUX_TRY_COMPILE_SYMBOL([
1949 #include <linux/kernel.h>
1950 ], [
1951 kvasprintf(0, NULL, *((va_list*)NULL));
1952 ], [kvasprintf], [], [
1953 AC_MSG_RESULT(yes)
1954 AC_DEFINE(HAVE_KVASPRINTF, 1, [kvasprintf() is available])
1955 ], [
1956 AC_MSG_RESULT(no)
1957 ])
b868e22f 1958])
f0ff89fc 1959
0d0b5237
BB		 1960dnl #
1961dnl # 2.6.29 API change,
1962dnl # vfs_fsync() funcation added, prior to this use file_fsync().
1963dnl #
723aa3b0
ED		 1964AC_DEFUN([SPL_AC_VFS_FSYNC],
1965 [AC_MSG_CHECKING([whether vfs_fsync() is available])
1966 SPL_LINUX_TRY_COMPILE_SYMBOL([
1967 #include <linux/fs.h>
1968 ], [
1969 (void) vfs_fsync;
1970 ], [vfs_fsync], [fs/sync.c], [
1971 AC_MSG_RESULT(yes)
1972 AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])
1973 ], [
1974 AC_MSG_RESULT(no)
1975 ])
0d0b5237
BB		 1976])
1977
f0ff89fc
BB		 1978dnl #
1979dnl # 2.6.35 API change,
0d0b5237 1980dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
f0ff89fc 1981dnl #
0d0b5237
BB		 1982AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
1983 AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
f0ff89fc 1984 SPL_LINUX_TRY_COMPILE([
0d0b5237 1985 #include <linux/fs.h>
f0ff89fc 1986 ],[
0d0b5237 1987 vfs_fsync(NULL, 0);
f0ff89fc
BB		 1988 ],[
1989 AC_MSG_RESULT(yes)
0d0b5237 1990 AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
f0ff89fc
BB		 1991 ],[
1992 AC_MSG_RESULT(no)
1993 ])
1994])
46aa7b39 1995
bbdc6ae4
ED		 1996dnl #
1997dnl # 3.5 API change,
1998dnl # inode_operations.truncate_range removed
1999dnl # (deprecated in favor of FALLOC_FL_PUNCH_HOLE)
2000dnl #
2001AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
2002 AC_MSG_CHECKING([whether truncate_range() inode operation is available])
2003 SPL_LINUX_TRY_COMPILE([
2004 #include <linux/fs.h>
2005 ],[
2006 struct inode_operations ops;
2007 ops.truncate_range = NULL;
2008 ],[
2009 AC_MSG_RESULT(yes)
2010 AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
2011 [truncate_range() inode operation is available])
2012 ],[
2013 AC_MSG_RESULT(no)
2014 ])
2015]))
2016
46aa7b39
NB		 2017dnl #
2018dnl # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
2019dnl # Earlier versions of rwsem_is_locked() were inline and had a race
2020dnl # condition. The fixed version is exported as a symbol. The race
2021dnl # condition is fixed by acquiring sem->wait_lock, so we must not
2022dnl # call that version while holding sem->wait_lock.
2023dnl #
723aa3b0
ED		 2024AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED],
2025 [AC_MSG_CHECKING([whether rwsem_is_locked() acquires sem->wait_lock])
2026 SPL_LINUX_TRY_COMPILE_SYMBOL([
2027 #include <linux/rwsem.h>
2028 int rwsem_is_locked(struct rw_semaphore *sem) { return 0; }
2029 ], [], [rwsem_is_locked], [lib/rwsem-spinlock.c], [
2030 AC_MSG_RESULT(yes)
2031 AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
2032 [rwsem_is_locked() acquires sem->wait_lock])
2033 ], [
2034 AC_MSG_RESULT(no)
2035 ])
46aa7b39 2036])
914b0631
BB		 2037
2038dnl #
2039dnl # 2.6.37 API compat,
2040dnl # The function invalidate_inodes() is no longer exported by the kernel.
2041dnl # The prototype however is still available which means it is safe
2042dnl # to acquire the symbol's address using spl_kallsyms_lookup_name().
2043dnl #
5f6c14b1
BB		 2044dnl # The Proxmox VE kernel contains a patch which renames the function
2045dnl # invalidate_inodes() to invalidate_inodes_check(). In the process
2046dnl # it adds a 'check' argument and a '#define invalidate_inodes(x)'
2047dnl # compatibility wrapper for legacy callers. Therefore, if either
2048dnl # of these functions are exported invalidate_inodes() can be
2049dnl # safely used.
2050dnl #
914b0631 2051AC_DEFUN([SPL_AC_KERNEL_INVALIDATE_INODES], [
723aa3b0
ED		 2052 AC_MSG_CHECKING([whether invalidate_inodes() is available])
2053 SPL_LINUX_TRY_COMPILE_SYMBOL([
2054 #include <linux/fs.h>
2055 ], [
2056 invalidate_inodes;
2057 ], [invalidate_inodes], [], [
2058 AC_MSG_RESULT(yes)
2059 AC_DEFINE(HAVE_INVALIDATE_INODES, 1,
2060 [invalidate_inodes() is available])
2061 ], [
2062 AC_MSG_RESULT(no)
2063 ])
2064
2065 AC_MSG_CHECKING([whether invalidate_inodes_check() is available])
2066 SPL_LINUX_TRY_COMPILE_SYMBOL([
2067 #include <linux/fs.h>
476ff5a4
ED		 2068 #ifndef invalidate_inodes
2069 #error invalidate_inodes is not a macro
2070 #endif
2071 ], [ ], [invalidate_inodes_check], [], [
723aa3b0
ED		 2072 AC_MSG_RESULT(yes)
2073 AC_DEFINE(HAVE_INVALIDATE_INODES_CHECK, 1,
2074 [invalidate_inodes_check() is available])
2075 ], [
2076 AC_MSG_RESULT(no)
2077 ])
914b0631 2078])
e76f4bf1 2079
9b0f9079
BB		 2080dnl #
2081dnl # 2.6.39 API compat,
2082dnl # The function invalidate_inodes() now take 2 arguments. The second
2083dnl # 'kill_dirty' argument describes how invalidate_inodes() should
2084dnl # handle dirty inodes. Only when set will dirty inodes be discarded,
2085dnl # otherwise they will be handled as busy.
2086dnl #
2087dnl # Unfortunately, we don't have access to the invalidate_inodes()
2088dnl # prototype so it's not easy to check how many arguments it takes.
2089dnl # However, this change was done for the benefit of invalidate_device()
2090dnl # which also added an argument. The invalidate_device() symbol does
2091dnl # exist in the development headers so if it takes two arguments we
2092dnl # can fairly safely infer that invalidate_inodes() takes two arguments
2093dnl # as well. See commit 93b270f76e7ef3b81001576860c2701931cdc78b.
2094dnl #
2095AC_DEFUN([SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES],
2096 [AC_MSG_CHECKING([whether invalidate_inodes() wants 2 args])
2097 SPL_LINUX_TRY_COMPILE([
2098 #include <linux/fs.h>
2099 ],[
2100 return __invalidate_device(NULL, 0);
2101 ],[
2102 AC_MSG_RESULT(yes)
2103 AC_DEFINE(HAVE_2ARGS_INVALIDATE_INODES, 1,
2104 [invalidate_inodes() wants 2 args])
2105 ],[
2106 AC_MSG_RESULT(no)
2107 ])
2108])
2109
e76f4bf1
BB		 2110dnl #
2111dnl # 2.6.xx API compat,
2112dnl # There currently exists no exposed API to partially shrink the dcache.
2113dnl # The expected mechanism to shrink the cache is a registered shrinker
2114dnl # which is called during memory pressure.
2115dnl #
723aa3b0
ED		 2116AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY],
2117 [AC_MSG_CHECKING([whether shrink_dcache_memory() is available])
2118 SPL_LINUX_TRY_COMPILE_SYMBOL([
2119 #include <linux/dcache.h>
2120 ], [
2121 shrink_dcache_memory(0, 0);
2122 ], [shrink_dcache_memory], [fs/dcache.c], [
2123 AC_MSG_RESULT(yes)
2124 AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
2125 [shrink_dcache_memory() is available])
2126 ], [
2127 AC_MSG_RESULT(no)
2128 ])
e76f4bf1
BB		 2129])
2130
2131dnl #
2132dnl # 2.6.xx API compat,
2133dnl # There currently exists no exposed API to partially shrink the icache.
2134dnl # The expected mechanism to shrink the cache is a registered shrinker
2135dnl # which is called during memory pressure.
2136dnl #
723aa3b0
ED		 2137AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY],
2138 [AC_MSG_CHECKING([whether shrink_icache_memory() is available])
2139 SPL_LINUX_TRY_COMPILE_SYMBOL([
2140 #include <linux/dcache.h>
2141 ], [
2142 shrink_icache_memory(0, 0);
2143 ], [shrink_icache_memory], [fs/inode.c], [
2144 AC_MSG_RESULT(yes)
2145 AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
2146 [shrink_icache_memory() is available])
2147 ], [
2148 AC_MSG_RESULT(no)
2149 ])
e76f4bf1 2150])
b1cbc461
BB		 2151
2152dnl #
2153dnl # 2.6.39 API compat,
2154dnl # The path_lookup() function has been renamed to kern_path_parent()
2155dnl # and the flags argument has been removed. The only behavior now
2156dnl # offered is that of LOOKUP_PARENT. The spl already always passed
2157dnl # this flag so dropping the flag does not impact us.
2158dnl #
12ff95ff
BB		 2159AC_DEFUN([SPL_AC_KERN_PATH_PARENT_HEADER], [
2160 SPL_CHECK_SYMBOL_HEADER(
2161 [kern_path_parent],
2162 [int kern_path_parent(const char \*, struct nameidata \*)],
2163 [include/linux/namei.h],
2164 [AC_DEFINE(HAVE_KERN_PATH_PARENT_HEADER, 1,
2165 [kern_path_parent() is available])],
2166 [])
2167])
2168
2169dnl #
2170dnl # 3.1 API compat,
2171dnl # The kern_path_parent() symbol is no longer exported by the kernel.
2172dnl # However, it remains the prefered interface and since we still have
2173dnl # access to the prototype we dynamically lookup the required address.
2174dnl #
723aa3b0
ED		 2175AC_DEFUN([SPL_AC_KERN_PATH_PARENT_SYMBOL],
2176 [AC_MSG_CHECKING([whether kern_path_parent() is available])
2177 SPL_LINUX_TRY_COMPILE_SYMBOL([
2178 #include <linux/namei.h>
2179 ], [
2180 kern_path_parent(NULL, NULL);
2181 ], [kern_path_parent], [fs/namei.c], [
2182 AC_MSG_RESULT(yes)
2183 AC_DEFINE(HAVE_KERN_PATH_PARENT_SYMBOL, 1,
2184 [kern_path_parent() is available])
2185 ], [
2186 AC_MSG_RESULT(no)
2187 ])
b1cbc461 2188])
3dfc591a
BB		 2189
2190dnl #
2191dnl # 2.6.39 API compat,
2192dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
2193dnl # This was done to avoid always having to allocate the maximum size
2194dnl # workspace (268K). The caller can now specific the windowBits and
2195dnl # memLevel compression parameters to get a smaller workspace.
2196dnl #
2197AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
2198 [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
2199 SPL_LINUX_TRY_COMPILE([
2200 #include <linux/zlib.h>
2201 ],[
2202 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
2203 ],[
2204 AC_MSG_RESULT(yes)
2205 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
2206 [zlib_deflate_workspacesize() wants 2 args])
2207 ],[
2208 AC_MSG_RESULT(no)
2209 ])
2210])
a55bcaad
BB		 2211
2212dnl #
2213dnl # 2.6.39 API change,
2214dnl # Shrinker adjust to use common shrink_control structure.
2215dnl #
2216AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
2217 AC_MSG_CHECKING([whether struct shrink_control exists])
2218 SPL_LINUX_TRY_COMPILE([
2219 #include <linux/mm.h>
2220 ],[
2221 struct shrink_control sc __attribute__ ((unused));
2222
2223 sc.nr_to_scan = 0;
2224 sc.gfp_mask = GFP_KERNEL;
2225 ],[
2226 AC_MSG_RESULT(yes)
2227 AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
2228 [struct shrink_control exists])
2229 ],[
2230 AC_MSG_RESULT(no)
2231 ])
2232])
588d9004
DH		 2233
2234dnl #
2235dnl # 3.1 API Change
2236dnl #
2237dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
2238dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
2239dnl #
2240AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
2241 AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
2242 tmp_flags="$EXTRA_KCFLAGS"
2243 EXTRA_KCFLAGS="-Werror"
2244 SPL_LINUX_TRY_COMPILE([
2245 #include <linux/rwsem.h>
2246 ],[
2247 struct rw_semaphore dummy_semaphore __attribute__ ((unused));
2248 raw_spinlock_t dummy_lock __attribute__ ((unused));
2249 dummy_semaphore.wait_lock = dummy_lock;
2250 ],[
2251 AC_MSG_RESULT(yes)
2252 AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
2253 [struct rw_semaphore member wait_lock is raw_spinlock_t])
2254 ],[
2255 AC_MSG_RESULT(no)
2256 ])
2257 EXTRA_KCFLAGS="$tmp_flags"
2258])
mirror of SPL module used by << 0.8.x ZFSOnLinux