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Remove custom install-data-local for headers
[mirror_spl.git] / config / spl-build.m4
CommitLineData
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_2ARGS_REGISTER_SYSCTL
30 SPL_AC_SET_SHRINKER
23aa63cb 31 SPL_AC_3ARGS_SHRINKER_CALLBACK
86933a6e
BB		 32 SPL_AC_PATH_IN_NAMEIDATA
33 SPL_AC_TASK_CURR
34 SPL_AC_CTL_UNNUMBERED
79a3bf13 35 SPL_AC_CTL_NAME
86933a6e
BB		 36 SPL_AC_FLS64
37 SPL_AC_DEVICE_CREATE
38 SPL_AC_5ARGS_DEVICE_CREATE
39 SPL_AC_CLASS_DEVICE_CREATE
40 SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
41 SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
42 SPL_AC_TIMESPEC_SUB
43 SPL_AC_INIT_UTSNAME
86933a6e
BB		 44 SPL_AC_UACCESS_HEADER
45 SPL_AC_KMALLOC_NODE
46 SPL_AC_MONOTONIC_CLOCK
47 SPL_AC_INODE_I_MUTEX
4d54fdee 48 SPL_AC_MUTEX_OWNER
86fd39f3 49 SPL_AC_MUTEX_OWNER_TASK_STRUCT
86933a6e 50 SPL_AC_MUTEX_LOCK_NESTED
86933a6e
BB		 51 SPL_AC_3ARGS_ON_EACH_CPU
52 SPL_AC_KALLSYMS_LOOKUP_NAME
53 SPL_AC_GET_VMALLOC_INFO
54 SPL_AC_PGDAT_HELPERS
55 SPL_AC_FIRST_ONLINE_PGDAT
56 SPL_AC_NEXT_ONLINE_PGDAT
57 SPL_AC_NEXT_ZONE
58 SPL_AC_PGDAT_LIST
86933a6e 59 SPL_AC_GLOBAL_PAGE_STATE
6ae7fef5
BB		 60 SPL_AC_ZONE_STAT_ITEM_FREE
61 SPL_AC_ZONE_STAT_ITEM_INACTIVE
62 SPL_AC_ZONE_STAT_ITEM_ACTIVE
63 SPL_AC_GET_ZONE_COUNTS
7119bf70 64 SPL_AC_USER_PATH_DIR
51a727e9
BB		 65 SPL_AC_SET_FS_PWD
66 SPL_AC_2ARGS_SET_FS_PWD
86933a6e
BB		 67 SPL_AC_2ARGS_VFS_UNLINK
68 SPL_AC_4ARGS_VFS_RENAME
0d0b5237
BB		 69 SPL_AC_VFS_FSYNC
70 SPL_AC_2ARGS_VFS_FSYNC
bbdc6ae4 71 SPL_AC_INODE_TRUNCATE_RANGE
9b2048c2 72 SPL_AC_FS_STRUCT_SPINLOCK
ec7d53e9
BB		 73 SPL_AC_CRED_STRUCT
74 SPL_AC_GROUPS_SEARCH
e811949a 75 SPL_AC_PUT_TASK_STRUCT
3977f837 76 SPL_AC_5ARGS_PROC_HANDLER
b868e22f 77 SPL_AC_KVASPRINTF
46aa7b39 78 SPL_AC_EXPORTED_RWSEM_IS_LOCKED
1c7b3eaf 79 SPL_AC_KERNEL_FALLOCATE
e76f4bf1
BB		 80 SPL_AC_SHRINK_DCACHE_MEMORY
81 SPL_AC_SHRINK_ICACHE_MEMORY
12ff95ff
BB		 82 SPL_AC_KERN_PATH_PARENT_HEADER
83 SPL_AC_KERN_PATH_PARENT_SYMBOL
bcb15891 84 SPL_AC_KERN_PATH_LOCKED
de081a2a 85 SPL_AC_CONFIG_KALLSYMS
42b3ce62
BB		 86 SPL_AC_CONFIG_ZLIB_INFLATE
87 SPL_AC_CONFIG_ZLIB_DEFLATE
3dfc591a 88 SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
a55bcaad 89 SPL_AC_SHRINK_CONTROL_STRUCT
588d9004 90 SPL_AC_RWSEM_SPINLOCK_IS_RAW
86933a6e
BB		 91])
92
93AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
bb339d06 94 modpost=$LINUX/scripts/Makefile.modpost
86933a6e 95 AC_MSG_CHECKING([kernel file name for module symbols])
0408008b 96 if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
bb339d06
BB		 97 if grep -q Modules.symvers $modpost; then
98 LINUX_SYMBOLS=Modules.symvers
99 else
100 LINUX_SYMBOLS=Module.symvers
101 fi
912fd84d
BB		 102
103 if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
104 AC_MSG_ERROR([
105 *** Please make sure the kernel devel package for your distribution
106 *** is installed. If your building with a custom kernel make sure the
107 *** kernel is configured, built, and the '--with-linux=PATH' configure
108 *** option refers to the location of the kernel source.])
109 fi
86933a6e 110 else
bb339d06 111 LINUX_SYMBOLS=NONE
86933a6e
BB		 112 fi
113 AC_MSG_RESULT($LINUX_SYMBOLS)
114 AC_SUBST(LINUX_SYMBOLS)
115])
116
57d86234 117AC_DEFUN([SPL_AC_KERNEL], [
57d86234 118 AC_ARG_WITH([linux],
119 AS_HELP_STRING([--with-linux=PATH],
120 [Path to kernel source]),
39a3d2a4 121 [kernelsrc="$withval"])
57d86234 122
123 AC_ARG_WITH([linux-obj],
124 AS_HELP_STRING([--with-linux-obj=PATH],
125 [Path to kernel build objects]),
126 [kernelbuild="$withval"])
127
128 AC_MSG_CHECKING([kernel source directory])
129 if test -z "$kernelsrc"; then
22ccfaa8
BB		 130 if test -e "/lib/modules/$(uname -r)/source"; then
131 headersdir="/lib/modules/$(uname -r)/source"
132 sourcelink=$(readlink -f "$headersdir")
133 elif test -e "/lib/modules/$(uname -r)/build"; then
134 headersdir="/lib/modules/$(uname -r)/build"
534c4e38
BM		 135 sourcelink=$(readlink -f "$headersdir")
136 else
137 sourcelink=$(ls -1d /usr/src/kernels/* \
723aa3b0 138 /usr/src/linux-* \
534c4e38
BM		 139 2>/dev/null | grep -v obj | tail -1)
140 fi
57d86234 141
8fd4e3af 142 if test -n "$sourcelink" && test -e ${sourcelink}; then
d4326403 143 kernelsrc=`readlink -f ${sourcelink}`
d4326403 144 else
251677e9 145 kernelsrc="[Not found]"
57d86234 146 fi
c5f70460
BB		 147 else
148 if test "$kernelsrc" = "NONE"; then
149 kernsrcver=NONE
150 fi
57d86234 151 fi
152
153 AC_MSG_RESULT([$kernelsrc])
251677e9
BB		 154 if test ! -d "$kernelsrc"; then
155 AC_MSG_ERROR([
156 *** Please make sure the kernel devel package for your distribution
157 *** is installed then try again. If that fails you can specify the
158 *** location of the kernel source with the '--with-linux=PATH' option.])
159 fi
160
57d86234 161 AC_MSG_CHECKING([kernel build directory])
39a3d2a4 162 if test -z "$kernelbuild"; then
22ccfaa8
BB		 163 if test -e "/lib/modules/$(uname -r)/build"; then
164 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
165 elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
e2d28a37
BB		 166 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
167 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
168 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
169 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
170 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
39a3d2a4
BB		 171 else
172 kernelbuild=${kernelsrc}
173 fi
bf338d8d 174 fi
57d86234 175 AC_MSG_RESULT([$kernelbuild])
176
177 AC_MSG_CHECKING([kernel source version])
fd921c2e
BB		 178 utsrelease1=$kernelbuild/include/linux/version.h
179 utsrelease2=$kernelbuild/include/linux/utsrelease.h
180 utsrelease3=$kernelbuild/include/generated/utsrelease.h
181 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
182 utsrelease=linux/version.h
183 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
184 utsrelease=linux/utsrelease.h
185 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
186 utsrelease=generated/utsrelease.h
187 fi
57d86234 188
fd921c2e
BB		 189 if test "$utsrelease"; then
190 kernsrcver=`(echo "#include <$utsrelease>";
57d86234 191 echo "kernsrcver=UTS_RELEASE") |
d4326403 192 cpp -I $kernelbuild/include |
57d86234 193 grep "^kernsrcver=" | cut -d \" -f 2`
57d86234 194
fd921c2e
BB		 195 if test -z "$kernsrcver"; then
196 AC_MSG_RESULT([Not found])
197 AC_MSG_ERROR([*** Cannot determine kernel version.])
198 fi
199 else
57d86234 200 AC_MSG_RESULT([Not found])
0408008b
ED		 201 if test "x$enable_linux_builtin" != xyes; then
202 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
203 else
204 AC_MSG_ERROR([
205 *** Cannot find UTS_RELEASE definition.
206 *** Please run 'make prepare' inside the kernel source tree.])
207 fi
57d86234 208 fi
209
210 AC_MSG_RESULT([$kernsrcver])
211
57d86234 212 LINUX=${kernelsrc}
213 LINUX_OBJ=${kernelbuild}
c5f70460
BB		 214 LINUX_VERSION=${kernsrcver}
215
57d86234 216 AC_SUBST(LINUX)
217 AC_SUBST(LINUX_OBJ)
c5f70460 218 AC_SUBST(LINUX_VERSION)
57d86234 219
86933a6e 220 SPL_AC_MODULE_SYMVERS
2e0e7e69
BB		 221])
222
287b2fb1
BB		 223dnl #
224dnl # Default SPL user configuration
225dnl #
ad35b6a6 226AC_DEFUN([SPL_AC_CONFIG_USER], [])
287b2fb1
BB		 227
228dnl #
229dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
230dnl # are missing it is non-fatal but you will not be able to build
231dnl # RPM packages and will be warned if you try too.
232dnl #
233AC_DEFUN([SPL_AC_RPM], [
234 RPM=rpm
235 RPMBUILD=rpmbuild
236
237 AC_MSG_CHECKING([whether $RPM is available])
238 AS_IF([tmp=$($RPM --version 2>/dev/null)], [
239 RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
240 HAVE_RPM=yes
241 AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
242 ],[
243 HAVE_RPM=no
244 AC_MSG_RESULT([$HAVE_RPM])
245 ])
246
247 AC_MSG_CHECKING([whether $RPMBUILD is available])
248 AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
249 RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
250 HAVE_RPMBUILD=yes
251 AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
252 ],[
253 HAVE_RPMBUILD=no
254 AC_MSG_RESULT([$HAVE_RPMBUILD])
255 ])
256
257 AC_SUBST(HAVE_RPM)
258 AC_SUBST(RPM)
259 AC_SUBST(RPM_VERSION)
260
261 AC_SUBST(HAVE_RPMBUILD)
262 AC_SUBST(RPMBUILD)
263 AC_SUBST(RPMBUILD_VERSION)
264])
265
266dnl #
267dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
268dnl # tools are missing it is non-fatal but you will not be able to build
269dnl # DEB packages and will be warned if you try too.
270dnl #
271AC_DEFUN([SPL_AC_DPKG], [
272 DPKG=dpkg
273 DPKGBUILD=dpkg-buildpackage
274
275 AC_MSG_CHECKING([whether $DPKG is available])
276 AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
277 DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
278 HAVE_DPKG=yes
279 AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
280 ],[
281 HAVE_DPKG=no
282 AC_MSG_RESULT([$HAVE_DPKG])
283 ])
284
285 AC_MSG_CHECKING([whether $DPKGBUILD is available])
286 AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
287 DPKGBUILD_VERSION=$(echo $tmp | \
288 $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
289 HAVE_DPKGBUILD=yes
290 AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
291 ],[
292 HAVE_DPKGBUILD=no
293 AC_MSG_RESULT([$HAVE_DPKGBUILD])
294 ])
295
296 AC_SUBST(HAVE_DPKG)
297 AC_SUBST(DPKG)
298 AC_SUBST(DPKG_VERSION)
299
300 AC_SUBST(HAVE_DPKGBUILD)
301 AC_SUBST(DPKGBUILD)
302 AC_SUBST(DPKGBUILD_VERSION)
303])
304
c2dceb5c
PS		 305dnl #
306dnl # Check for pacman+makepkg to build Arch Linux packages. If these
307dnl # tools are missing it is non-fatal but you will not be able to
308dnl # build Arch Linux packages and will be warned if you try too.
309dnl #
310AC_DEFUN([SPL_AC_PACMAN], [
311 PACMAN=pacman
312 MAKEPKG=makepkg
313
314 AC_MSG_CHECKING([whether $PACMAN is available])
315 tmp=$($PACMAN --version 2>/dev/null)
316 AS_IF([test -n "$tmp"], [
317 PACMAN_VERSION=$(echo $tmp |
318 $AWK '/Pacman/ { print $[3] }' |
319 $SED 's/^v//')
320 HAVE_PACMAN=yes
321 AC_MSG_RESULT([$HAVE_PACMAN ($PACMAN_VERSION)])
322 ],[
323 HAVE_PACMAN=no
324 AC_MSG_RESULT([$HAVE_PACMAN])
325 ])
326
327 AC_MSG_CHECKING([whether $MAKEPKG is available])
328 tmp=$($MAKEPKG --version 2>/dev/null)
329 AS_IF([test -n "$tmp"], [
330 MAKEPKG_VERSION=$(echo $tmp | $AWK '/makepkg/ { print $[3] }')
331 HAVE_MAKEPKG=yes
332 AC_MSG_RESULT([$HAVE_MAKEPKG ($MAKEPKG_VERSION)])
333 ],[
334 HAVE_MAKEPKG=no
335 AC_MSG_RESULT([$HAVE_MAKEPKG])
336 ])
337
338 AC_SUBST(HAVE_PACMAN)
339 AC_SUBST(PACMAN)
340 AC_SUBST(PACMAN_VERSION)
341
342 AC_SUBST(HAVE_MAKEPKG)
343 AC_SUBST(MAKEPKG)
344 AC_SUBST(MAKEPKG_VERSION)
345])
346
287b2fb1
BB		 347dnl #
348dnl # Until native packaging for various different packing systems
349dnl # can be added the least we can do is attempt to use alien to
350dnl # convert the RPM packages to the needed package type. This is
351dnl # a hack but so far it has worked reasonable well.
352dnl #
353AC_DEFUN([SPL_AC_ALIEN], [
354 ALIEN=alien
355
356 AC_MSG_CHECKING([whether $ALIEN is available])
357 AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
358 ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
359 HAVE_ALIEN=yes
360 AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
361 ],[
362 HAVE_ALIEN=no
363 AC_MSG_RESULT([$HAVE_ALIEN])
364 ])
365
366 AC_SUBST(HAVE_ALIEN)
367 AC_SUBST(ALIEN)
368 AC_SUBST(ALIEN_VERSION)
369])
370
371dnl #
372dnl # Using the VENDOR tag from config.guess set the default
373dnl # package type for 'make pkg': (rpm | deb | tgz)
374dnl #
375AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
73fc084e 376 AC_MSG_CHECKING([linux distribution])
a3a69b74
BB		 377 if test -f /etc/toss-release ; then
378 VENDOR=toss ;
73fc084e
BB		 379 elif test -f /etc/fedora-release ; then
380 VENDOR=fedora ;
a3a69b74
BB		 381 elif test -f /etc/redhat-release ; then
382 VENDOR=redhat ;
383 elif test -f /etc/gentoo-release ; then
384 VENDOR=gentoo ;
cd2817f8
PS		 385 elif test -f /etc/arch-release ; then
386 VENDOR=arch ;
73fc084e
BB		 387 elif test -f /etc/SuSE-release ; then
388 VENDOR=sles ;
389 elif test -f /etc/slackware-version ; then
390 VENDOR=slackware ;
a3a69b74
BB		 391 elif test -f /etc/lunar.release ; then
392 VENDOR=lunar ;
393 elif test -f /etc/lsb-release ; then
394 VENDOR=ubuntu ;
395 elif test -f /etc/debian_version ; then
396 VENDOR=debian ;
73fc084e
BB		 397 else
398 VENDOR= ;
399 fi
400 AC_MSG_RESULT([$VENDOR])
401 AC_SUBST(VENDOR)
287b2fb1
BB		 402
403 AC_MSG_CHECKING([default package type])
404 case "$VENDOR" in
a3a69b74
BB		 405 toss) DEFAULT_PACKAGE=rpm ;;
406 redhat) DEFAULT_PACKAGE=rpm ;;
407 fedora) DEFAULT_PACKAGE=rpm ;;
408 gentoo) DEFAULT_PACKAGE=tgz ;;
409 arch) DEFAULT_PACKAGE=arch ;;
410 sles) DEFAULT_PACKAGE=rpm ;;
411 slackware) DEFAULT_PACKAGE=tgz ;;
412 lunar) DEFAULT_PACKAGE=tgz ;;
413 ubuntu) DEFAULT_PACKAGE=deb ;;
414 debian) DEFAULT_PACKAGE=deb ;;
415 *) DEFAULT_PACKAGE=rpm ;;
287b2fb1
BB		 416 esac
417
418 AC_MSG_RESULT([$DEFAULT_PACKAGE])
419 AC_SUBST(DEFAULT_PACKAGE)
420])
421
422dnl #
423dnl # Default SPL user configuration
424dnl #
425AC_DEFUN([SPL_AC_PACKAGE], [
0b14b9f3 426 SPL_AC_DEFAULT_PACKAGE
287b2fb1
BB		 427 SPL_AC_RPM
428 SPL_AC_DPKG
429 SPL_AC_ALIEN
0b14b9f3
BB		 430
431 AS_IF([test "$VENDOR" = "arch"], [SPL_AC_PACMAN])
287b2fb1
BB		 432])
433
6a1c3d41 434AC_DEFUN([SPL_AC_LICENSE], [
86933a6e
BB		 435 AC_MSG_CHECKING([spl license])
436 LICENSE=GPL
437 AC_MSG_RESULT([$LICENSE])
6a1c3d41 438 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
86933a6e
BB		 439 AC_SUBST(LICENSE)
440])
441
442AC_DEFUN([SPL_AC_CONFIG], [
0408008b
ED		 443 SPL_CONFIG=all
444 AC_ARG_WITH([config],
445 AS_HELP_STRING([--with-config=CONFIG],
446 [Config file 'kernel|user|all|srpm']),
447 [SPL_CONFIG="$withval"])
448 AC_ARG_ENABLE([linux-builtin],
449 [AC_HELP_STRING([--enable-linux-builtin],
450 [Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
451 [],
452 [enable_linux_builtin=no])
453
454 AC_MSG_CHECKING([spl config])
455 AC_MSG_RESULT([$SPL_CONFIG]);
456 AC_SUBST(SPL_CONFIG)
457
458 case "$SPL_CONFIG" in
459 kernel) SPL_AC_CONFIG_KERNEL ;;
460 user) SPL_AC_CONFIG_USER ;;
461 all) SPL_AC_CONFIG_KERNEL
462 SPL_AC_CONFIG_USER ;;
c1541dfe 463 srpm) ;;
0408008b
ED		 464 *)
465 AC_MSG_RESULT([Error!])
466 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
467 user kernel|user|all|srpm]) ;;
468 esac
469
470 AM_CONDITIONAL([CONFIG_USER],
471 [test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
472 AM_CONDITIONAL([CONFIG_KERNEL],
473 [test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
474 [test "x$enable_linux_builtin" != xyes ])
6a1c3d41 475])
476
055ffd98
BB		 477dnl #
478dnl # Enable if the SPL should be compiled with internal debugging enabled.
479dnl # By default this support is disabled.
480dnl #
57d86234 481AC_DEFUN([SPL_AC_DEBUG], [
c950d148 482 AC_MSG_CHECKING([whether debugging is enabled])
055ffd98
BB		 483 AC_ARG_ENABLE([debug],
484 [AS_HELP_STRING([--enable-debug],
485 [Enable generic debug support @<:@default=no@:>@])],
486 [],
487 [enable_debug=no])
488
489 AS_IF([test "x$enable_debug" = xyes],
c950d148 490 [
c950d148
BB		 491 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
492 DEBUG_CFLAGS="-DDEBUG -Werror"
3c208a54
BB		 493 DEBUG_SPL="_with_debug"
494 ], [
c950d148
BB		 495 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
496 DEBUG_CFLAGS="-DNDEBUG"
3c208a54 497 DEBUG_SPL="_without_debug"
c950d148 498 ])
055ffd98 499
c950d148 500 AC_SUBST(DEBUG_CFLAGS)
3c208a54 501 AC_SUBST(DEBUG_SPL)
055ffd98 502 AC_MSG_RESULT([$enable_debug])
57d86234 503])
504
4b2220f0
BB		 505dnl #
506dnl # Enabled by default it provides a basic debug log infrastructure.
507dnl # Each subsystem registers itself with a name and logs messages
508dnl # using predefined types. If the debug mask it set to allow the
509dnl # message type it will be written to the internal log. The log
510dnl # can be dumped to a file by echoing 1 to the 'dump' proc entry,
511dnl # after dumping the log it must be decoded using the spl utility.
512dnl #
513dnl # echo 1 >/proc/sys/kernel/spl/debug/dump
514dnl # spl /tmp/spl-log.xxx.yyy /tmp/spl-log.xxx.yyy.txt
515dnl #
516AC_DEFUN([SPL_AC_DEBUG_LOG], [
517 AC_ARG_ENABLE([debug-log],
518 [AS_HELP_STRING([--enable-debug-log],
519 [Enable basic debug logging @<:@default=yes@:>@])],
520 [],
521 [enable_debug_log=yes])
522
523 AS_IF([test "x$enable_debug_log" = xyes],
3c208a54
BB		 524 [
525 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_LOG"
526 DEBUG_LOG="_with_debug_log"
527 AC_DEFINE([DEBUG_LOG], [1],
4b2220f0 528 [Define to 1 to enable basic debug logging])
3c208a54
BB		 529 ], [
530 DEBUG_LOG="_without_debug_log"
531 ])
4b2220f0 532
3c208a54 533 AC_SUBST(DEBUG_LOG)
4b2220f0
BB		 534 AC_MSG_CHECKING([whether basic debug logging is enabled])
535 AC_MSG_RESULT([$enable_debug_log])
536])
537
055ffd98
BB		 538dnl #
539dnl # Enabled by default it provides a minimal level of memory tracking.
540dnl # A total count of bytes allocated is kept for each alloc and free.
541dnl # Then at module unload time a report to the console will be printed
542dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
543dnl # and provide an easy way to inspect the kmem based slab.
544dnl #
57d86234 545AC_DEFUN([SPL_AC_DEBUG_KMEM], [
055ffd98
BB		 546 AC_ARG_ENABLE([debug-kmem],
547 [AS_HELP_STRING([--enable-debug-kmem],
548 [Enable basic kmem accounting @<:@default=yes@:>@])],
549 [],
550 [enable_debug_kmem=yes])
57d86234 551
055ffd98 552 AS_IF([test "x$enable_debug_kmem" = xyes],
3c208a54
BB		 553 [
554 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
555 DEBUG_KMEM="_with_debug_kmem"
556 AC_DEFINE([DEBUG_KMEM], [1],
055ffd98 557 [Define to 1 to enable basic kmem accounting])
3c208a54
BB		 558 ], [
559 DEBUG_KMEM="_without_debug_kmem"
560 ])
055ffd98 561
3c208a54 562 AC_SUBST(DEBUG_KMEM)
055ffd98
BB		 563 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
564 AC_MSG_RESULT([$enable_debug_kmem])
57d86234 565])
566
055ffd98
BB		 567dnl #
568dnl # Disabled by default it provides detailed memory tracking. This
569dnl # feature also requires --enable-debug-kmem to be set. When enabled
570dnl # not only will total bytes be tracked but also the location of every
571dnl # alloc and free. When the SPL module is unloaded a list of all leaked
572dnl # addresses and where they were allocated will be dumped to the console.
573dnl # Enabling this feature has a significant impact on performance but it
574dnl # makes finding memory leaks pretty straight forward.
575dnl #
576AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
577 AC_ARG_ENABLE([debug-kmem-tracking],
578 [AS_HELP_STRING([--enable-debug-kmem-tracking],
579 [Enable detailed kmem tracking @<:@default=no@:>@])],
580 [],
581 [enable_debug_kmem_tracking=no])
582
583 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
3c208a54
BB		 584 [
585 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
586 DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
587 AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
055ffd98 588 [Define to 1 to enable detailed kmem tracking])
3c208a54
BB		 589 ], [
590 DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
591 ])
055ffd98 592
3c208a54 593 AC_SUBST(DEBUG_KMEM_TRACKING)
055ffd98
BB		 594 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
595 AC_MSG_RESULT([$enable_debug_kmem_tracking])
57d86234 596])
597
598dnl #
599dnl # SPL_LINUX_CONFTEST
600dnl #
601AC_DEFUN([SPL_LINUX_CONFTEST], [
dbe561d8 602cat confdefs.h - <<_ACEOF >conftest.c
57d86234 603$1
604_ACEOF
605])
606
607dnl #
608dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
609dnl #
610m4_define([SPL_LANG_PROGRAM], [
611$1
612int
613main (void)
614{
615dnl Do *not* indent the following line: there may be CPP directives.
616dnl Don't move the `;' right after for the same reason.
617$2
618 ;
619 return 0;
620}
621])
622
623dnl #
624dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
625dnl #
626AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
c5f70460 627 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
df7cc5bc 628 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
c5f70460 629 echo "obj-m := conftest.o" >build/Makefile
df7cc5bc
ED		 630 modpost_flag=''
631 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
c5f70460 632 AS_IF(
df7cc5bc
ED		 633 [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])],
634 [$4],
635 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
c5f70460
BB		 636 )
637 rm -Rf build
57d86234 638])
639
640dnl #
641dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
642dnl #
643AC_DEFUN([SPL_LINUX_TRY_COMPILE],
644 [SPL_LINUX_COMPILE_IFELSE(
d50bd9e2 645 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
646 [modules],
647 [test -s build/conftest.o],
648 [$3], [$4])
57d86234 649])
650
57d86234 651dnl #
652dnl # SPL_CHECK_SYMBOL_EXPORT
653dnl # check symbol exported or not
654dnl #
723aa3b0 655AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
2e0e7e69
BB		 656 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
657 $LINUX_OBJ/Module*.symvers 2>/dev/null
57d86234 658 rc=$?
659 if test $rc -ne 0; then
660 export=0
661 for file in $2; do
2e0e7e69
BB		 662 grep -q -E "EXPORT_SYMBOL.*($1)" \
663 "$LINUX_OBJ/$file" 2>/dev/null
57d86234 664 rc=$?
723aa3b0
ED		 665 if test $rc -eq 0; then
666 export=1
667 break;
668 fi
57d86234 669 done
723aa3b0 670 if test $export -eq 0; then :
57d86234 671 $4
723aa3b0 672 else :
57d86234 673 $3
674 fi
723aa3b0 675 else :
57d86234 676 $3
677 fi
678])
679
723aa3b0
ED		 680dnl #
681dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
682dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
683dnl # is called if not compiling for builtin
684dnl #
685AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
686 SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
687 if test $rc -ne 0; then :
688 $6
689 else
690 if test "x$enable_linux_builtin" != xyes; then
691 SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
692 fi
693 if test $rc -ne 0; then :
694 $6
695 else :
696 $5
697 fi
698 fi
699])
700
12ff95ff
BB		 701dnl #
702dnl # SPL_CHECK_SYMBOL_HEADER
703dnl # check if a symbol prototype is defined in listed headers.
704dnl #
705AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
706 AC_MSG_CHECKING([whether symbol $1 exists in header])
707 header=0
708 for file in $3; do
709 grep -q "$2" "$LINUX/$file" 2>/dev/null
710 rc=$?
723aa3b0
ED		 711 if test $rc -eq 0; then
712 header=1
713 break;
714 fi
12ff95ff
BB		 715 done
716 if test $header -eq 0; then
717 AC_MSG_RESULT([no])
718 $5
719 else
720 AC_MSG_RESULT([yes])
721 $4
722 fi
723])
724
86de8532 725dnl #
726dnl # SPL_CHECK_HEADER
727dnl # check whether header exists and define HAVE_$2_HEADER
728dnl #
729AC_DEFUN([SPL_CHECK_HEADER],
730 [AC_MSG_CHECKING([whether header $1 exists])
731 SPL_LINUX_TRY_COMPILE([
d50bd9e2 732 #include <$1>
86de8532 733 ],[
734 return 0;
735 ],[
736 AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
737 AC_MSG_RESULT(yes)
738 $3
739 ],[
740 AC_MSG_RESULT(no)
741 $4
742 ])
743])
6a6cafbe 744
0408008b
ED		 745dnl #
746dnl # Basic toolchain sanity check.
747dnl #
748AC_DEFUN([SPL_AC_TEST_MODULE],
749 [AC_MSG_CHECKING([whether modules can be built])
750 SPL_LINUX_TRY_COMPILE([],[],[
751 AC_MSG_RESULT([yes])
752 ],[
753 AC_MSG_RESULT([no])
754 if test "x$enable_linux_builtin" != xyes; then
755 AC_MSG_ERROR([*** Unable to build an empty module.])
756 else
757 AC_MSG_ERROR([
758 *** Unable to build an empty module.
759 *** Please run 'make scripts' inside the kernel source tree.])
760 fi
761 ])
762])
763
57d86234 764dnl #
d04c8a56
BB		 765dnl # Use the atomic implemenation based on global spinlocks. This
766dnl # should only be needed by 32-bit kernels which do not provide
767dnl # the atomic64_* API. It may be optionally enabled as a fallback
768dnl # if problems are observed with the direct mapping to the native
769dnl # Linux atomic operations. You may not disable atomic spinlocks
770dnl # if you kernel does not an atomic64_* API.
57d86234 771dnl #
d04c8a56
BB		 772AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
773 AC_ARG_ENABLE([atomic-spinlocks],
774 [AS_HELP_STRING([--enable-atomic-spinlocks],
775 [Atomic types use spinlocks @<:@default=check@:>@])],
776 [],
777 [enable_atomic_spinlocks=check])
57d86234 778
a0f6da3d 779 SPL_LINUX_TRY_COMPILE([
dd3678fc 780 #include <linux/fs.h>
a0f6da3d 781 ],[
03318641 782 atomic64_t *ptr __attribute__ ((unused));
a0f6da3d 783 ],[
d04c8a56 784 have_atomic64_t=yes
a0f6da3d 785 AC_DEFINE(HAVE_ATOMIC64_T, 1,
d04c8a56 786 [kernel defines atomic64_t])
a0f6da3d 787 ],[
d04c8a56
BB		 788 have_atomic64_t=no
789 ])
790
791 AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
792 AS_IF([test "x$have_atomic64_t" = xyes], [
793 enable_atomic_spinlocks=no
794 ],[
795 enable_atomic_spinlocks=yes
796 ])
a0f6da3d 797 ])
d04c8a56
BB		 798
799 AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
800 AC_DEFINE([ATOMIC_SPINLOCK], [1],
801 [Atomic types use spinlocks])
802 ],[
803 AS_IF([test "x$have_atomic64_t" = xno], [
804 AC_MSG_FAILURE(
805 [--disable-atomic-spinlocks given but required atomic64 support is unavailable])
806 ])
807 ])
808
809 AC_MSG_CHECKING([whether atomic types use spinlocks])
810 AC_MSG_RESULT([$enable_atomic_spinlocks])
811
812 AC_MSG_CHECKING([whether kernel defines atomic64_t])
813 AC_MSG_RESULT([$have_atomic64_t])
a0f6da3d 814])
815
302b88e6
BB		 816dnl #
817dnl # 2.6.24 API change,
818dnl # check if atomic64_cmpxchg is defined
819dnl #
820AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
821 [AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
822 SPL_LINUX_TRY_COMPILE([
dd3678fc 823 #include <linux/fs.h>
302b88e6
BB		 824 ],[
825 atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
826 ],[
827 AC_MSG_RESULT([yes])
828 AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
829 [kernel defines atomic64_cmpxchg])
830 ],[
831 AC_MSG_RESULT([no])
832 ])
833])
834
835dnl #
836dnl # 2.6.24 API change,
837dnl # check if atomic64_xchg is defined
838dnl #
839AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
840 [AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
841 SPL_LINUX_TRY_COMPILE([
dd3678fc 842 #include <linux/fs.h>
302b88e6
BB		 843 ],[
844 atomic64_xchg((atomic64_t *)NULL, 0);
845 ],[
846 AC_MSG_RESULT([yes])
847 AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
848 [kernel defines atomic64_xchg])
849 ],[
850 AC_MSG_RESULT([no])
851 ])
852])
853
d04c8a56
BB		 854dnl #
855dnl # 2.6.24 API change,
856dnl # check if uintptr_t typedef is defined
857dnl #
858AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
859 [AC_MSG_CHECKING([whether kernel defines uintptr_t])
860 SPL_LINUX_TRY_COMPILE([
861 #include <linux/types.h>
862 ],[
03318641 863 uintptr_t *ptr __attribute__ ((unused));
d04c8a56
BB		 864 ],[
865 AC_MSG_RESULT([yes])
866 AC_DEFINE(HAVE_UINTPTR_T, 1,
867 [kernel defines uintptr_t])
868 ],[
869 AC_MSG_RESULT([no])
870 ])
871])
872
57d86234 873dnl #
3d061e9d 874dnl # 2.6.21 API change,
57d86234 875dnl # 'register_sysctl_table' use only one argument instead of two
876dnl #
877AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
878 [AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
879 SPL_LINUX_TRY_COMPILE([
d50bd9e2 880 #include <linux/sysctl.h>
57d86234 881 ],[
03318641 882 (void) register_sysctl_table(NULL, 0);
57d86234 883 ],[
d50bd9e2 884 AC_MSG_RESULT(yes)
885 AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
886 [register_sysctl_table() wants 2 args])
57d86234 887 ],[
d50bd9e2 888 AC_MSG_RESULT(no)
57d86234 889 ])
890])
891
57d86234 892dnl #
3d061e9d 893dnl # 2.6.23 API change
57d86234 894dnl # Old set_shrinker API replaced with register_shrinker
895dnl #
896AC_DEFUN([SPL_AC_SET_SHRINKER], [
897 AC_MSG_CHECKING([whether set_shrinker() available])
898 SPL_LINUX_TRY_COMPILE([
899 #include <linux/mm.h>
900 ],[
901 return set_shrinker(DEFAULT_SEEKS, NULL);
902 ],[
903 AC_MSG_RESULT([yes])
904 AC_DEFINE(HAVE_SET_SHRINKER, 1,
905 [set_shrinker() available])
906 ],[
907 AC_MSG_RESULT([no])
908 ])
909])
910
23aa63cb
BB		 911dnl #
912dnl # 2.6.35 API change,
913dnl # Add context to shrinker callback
914dnl #
915AC_DEFUN([SPL_AC_3ARGS_SHRINKER_CALLBACK],
916 [AC_MSG_CHECKING([whether shrinker callback wants 3 args])
917 tmp_flags="$EXTRA_KCFLAGS"
918 EXTRA_KCFLAGS="-Werror"
919 SPL_LINUX_TRY_COMPILE([
920 #include <linux/mm.h>
921
922 int shrinker_cb(struct shrinker *, int, unsigned int);
923 ],[
924 struct shrinker cache_shrinker = {
925 .shrink = shrinker_cb,
926 .seeks = DEFAULT_SEEKS,
927 };
928 register_shrinker(&cache_shrinker);
929 ],[
930 AC_MSG_RESULT(yes)
931 AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
932 [shrinker callback wants 3 args])
933 ],[
934 AC_MSG_RESULT(no)
935 ])
936 EXTRA_KCFLAGS="$tmp_flags"
937])
938
57d86234 939dnl #
3d061e9d 940dnl # 2.6.25 API change,
57d86234 941dnl # struct path entry added to struct nameidata
942dnl #
943AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
944 [AC_MSG_CHECKING([whether struct path used in struct nameidata])
945 SPL_LINUX_TRY_COMPILE([
d50bd9e2 946 #include <linux/namei.h>
57d86234 947 ],[
03318641 948 struct nameidata nd __attribute__ ((unused));
57d86234 949
950 nd.path.mnt = NULL;
951 nd.path.dentry = NULL;
952 ],[
d50bd9e2 953 AC_MSG_RESULT(yes)
954 AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
955 [struct path used in struct nameidata])
57d86234 956 ],[
d50bd9e2 957 AC_MSG_RESULT(no)
57d86234 958 ])
959])
960
961dnl #
962dnl # Custom SPL patch may export this system it is not required
963dnl #
723aa3b0
ED		 964AC_DEFUN([SPL_AC_TASK_CURR],
965 [AC_MSG_CHECKING([whether task_curr() is available])
966 SPL_LINUX_TRY_COMPILE_SYMBOL([
967 #include <linux/sched.h>
968 ], [
969 task_curr(NULL);
970 ], [task_curr], [kernel/sched.c], [
971 AC_MSG_RESULT(yes)
972 AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() is available])
973 ], [
974 AC_MSG_RESULT(no)
975 ])
57d86234 976])
977
978dnl #
3d061e9d 979dnl # 2.6.19 API change,
57d86234 980dnl # Use CTL_UNNUMBERED when binary sysctl is not required
981dnl #
982AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
983 [AC_MSG_CHECKING([whether unnumbered sysctl support exists])
984 SPL_LINUX_TRY_COMPILE([
d50bd9e2 985 #include <linux/sysctl.h>
57d86234 986 ],[
987 #ifndef CTL_UNNUMBERED
988 #error CTL_UNNUMBERED undefined
989 #endif
990 ],[
d50bd9e2 991 AC_MSG_RESULT(yes)
992 AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
993 [unnumbered sysctl support exists])
57d86234 994 ],[
d50bd9e2 995 AC_MSG_RESULT(no)
57d86234 996 ])
997])
877a32e9 998
79a3bf13
BB		 999dnl #
1000dnl # 2.6.33 API change,
1001dnl # Removed .ctl_name from struct ctl_table.
1002dnl #
1003AC_DEFUN([SPL_AC_CTL_NAME], [
1004 AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
1005 SPL_LINUX_TRY_COMPILE([
1006 #include <linux/sysctl.h>
1007 ],[
03318641 1008 struct ctl_table ctl __attribute__ ((unused));
79a3bf13
BB		 1009 ctl.ctl_name = 0;
1010 ],[
1011 AC_MSG_RESULT(yes)
1012 AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
1013 ],[
1014 AC_MSG_RESULT(no)
1015 ])
1016])
1017
877a32e9 1018dnl #
1019dnl # 2.6.16 API change.
1020dnl # Check if 'fls64()' is available
1021dnl #
1022AC_DEFUN([SPL_AC_FLS64],
6a6cafbe 1023 [AC_MSG_CHECKING([whether fls64() is available])
1024 SPL_LINUX_TRY_COMPILE([
1025 #include <linux/bitops.h>
1026 ],[
1027 return fls64(0);
1028 ],[
1029 AC_MSG_RESULT(yes)
1030 AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
1031 ],[
1032 AC_MSG_RESULT(no)
1033 ])
877a32e9 1034])
46c685d0 1035
1036dnl #
1037dnl # 2.6.18 API change, check whether device_create() is available.
1038dnl # Device_create() was introduced in 2.6.18 and depricated
1039dnl # class_device_create() which was fully removed in 2.6.26.
1040dnl #
723aa3b0
ED		 1041AC_DEFUN([SPL_AC_DEVICE_CREATE],
1042 [AC_MSG_CHECKING([whether device_create() is available])
1043 SPL_CHECK_SYMBOL_EXPORT([device_create], [drivers/base/core.c], [
1044 AC_MSG_RESULT(yes)
1045 AC_DEFINE(HAVE_DEVICE_CREATE, 1,
1046 [device_create() is available])
1047 ], [
1048 AC_MSG_RESULT(no)
1049 ])
46c685d0 1050])
1051
8123ac4f
BB		 1052dnl #
1053dnl # 2.6.27 API change,
1054dnl # device_create() uses 5 args, new 'drvdata' argument.
1055dnl #
1056AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
1057 AC_MSG_CHECKING([whether device_create() wants 5 args])
1058 tmp_flags="$EXTRA_KCFLAGS"
1059 EXTRA_KCFLAGS="-Werror"
1060 SPL_LINUX_TRY_COMPILE([
1061 #include <linux/device.h>
1062 ],[
1063 device_create(NULL, NULL, 0, NULL, "%d", 1);
1064 ],[
1065 AC_MSG_RESULT(yes)
1066 AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
1067 [device_create wants 5 args])
1068 ],[
1069 AC_MSG_RESULT(no)
1070 ])
1071 EXTRA_KCFLAGS="$tmp_flags"
1072])
1073
46c685d0 1074dnl #
1075dnl # 2.6.13 API change, check whether class_device_create() is available.
1076dnl # Class_device_create() was introduced in 2.6.13 and depricated
1077dnl # class_simple_device_add() which was fully removed in 2.6.13.
1078dnl #
723aa3b0
ED		 1079AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE],
1080 [AC_MSG_CHECKING([whether class_device_create() is available])
1081 SPL_LINUX_TRY_COMPILE_SYMBOL([
1082 #include <linux/device.h>
1083 ], [
1084 class_device_create(NULL, NULL, 0, NULL, NULL);
1085 ], [class_device_create], [drivers/base/class.c], [
1086 AC_MSG_RESULT(yes)
1087 AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
1088 [class_device_create() is available])
1089 ], [
1090 AC_MSG_RESULT(no)
1091 ])
46c685d0 1092])
6a6cafbe 1093
6a6cafbe 1094dnl #
1095dnl # 2.6.26 API change, set_normalized_timespec() is exported.
1096dnl #
723aa3b0
ED		 1097AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT],
1098 [AC_MSG_CHECKING([whether set_normalized_timespec() is available as export])
1099 SPL_LINUX_TRY_COMPILE_SYMBOL([
1100 #include <linux/time.h>
1101 ], [
1102 set_normalized_timespec(NULL, 0, 0);
1103 ], [set_normalized_timespec], [kernel/time.c], [
1104 AC_MSG_RESULT(yes)
1105 AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
1106 [set_normalized_timespec() is available as export])
1107 ], [
1108 AC_MSG_RESULT(no)
1109 ])
6a6cafbe 1110])
1111
1112dnl #
1113dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
1114dnl # previously it was available in time.h as an inline.
1115dnl #
86de8532 1116AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
1117 AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
6a6cafbe 1118 SPL_LINUX_TRY_COMPILE([
1119 #include <linux/time.h>
6a6cafbe 1120 void set_normalized_timespec(struct timespec *ts,
25557fd8 1121 time_t sec, long nsec) { }
1122 ],
1123 [],
1124 [
6a6cafbe 1125 AC_MSG_RESULT(no)
1126 ],[
1127 AC_MSG_RESULT(yes)
1128 AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
1129 [set_normalized_timespec() is available as inline])
1130 ])
1131])
1132
1133dnl #
1134dnl # 2.6.18 API change,
1135dnl # timespec_sub() inline function available in linux/time.h
1136dnl #
86de8532 1137AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
1138 AC_MSG_CHECKING([whether timespec_sub() is available])
6a6cafbe 1139 SPL_LINUX_TRY_COMPILE([
1140 #include <linux/time.h>
1141 ],[
03318641
BB		 1142 struct timespec a = { 0 };
1143 struct timespec b = { 0 };
1144 struct timespec c __attribute__ ((unused));
6a6cafbe 1145 c = timespec_sub(a, b);
1146 ],[
1147 AC_MSG_RESULT(yes)
1148 AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
1149 ],[
1150 AC_MSG_RESULT(no)
1151 ])
1152])
1153
86de8532 1154dnl #
3d061e9d 1155dnl # 2.6.19 API change,
1156dnl # check if init_utsname() is available in linux/utsname.h
1157dnl #
1158AC_DEFUN([SPL_AC_INIT_UTSNAME], [
1159 AC_MSG_CHECKING([whether init_utsname() is available])
1160 SPL_LINUX_TRY_COMPILE([
1161 #include <linux/utsname.h>
1162 ],[
03318641
BB		 1163 struct new_utsname *a __attribute__ ((unused));
1164 a = init_utsname();
3d061e9d 1165 ],[
1166 AC_MSG_RESULT(yes)
1167 AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
1168 ],[
1169 AC_MSG_RESULT(no)
1170 ])
1171])
1172
3d061e9d 1173dnl #
1174dnl # 2.6.18 API change,
1175dnl # added linux/uaccess.h
322640b7 1176dnl #
1177AC_DEFUN([SPL_AC_UACCESS_HEADER], [
1178 SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
1179])
3d061e9d 1180
1181dnl #
1182dnl # 2.6.12 API change,
1183dnl # check whether 'kmalloc_node()' is available.
1184dnl #
1185AC_DEFUN([SPL_AC_KMALLOC_NODE], [
1186 AC_MSG_CHECKING([whether kmalloc_node() is available])
1187 SPL_LINUX_TRY_COMPILE([
1188 #include <linux/slab.h>
1189 ],[
03318641
BB		 1190 void *a __attribute__ ((unused));
1191 a = kmalloc_node(1, GFP_KERNEL, 0);
3d061e9d 1192 ],[
1193 AC_MSG_RESULT(yes)
1194 AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
1195 ],[
1196 AC_MSG_RESULT(no)
1197 ])
1198])
1199
1200dnl #
1201dnl # 2.6.9 API change,
1202dnl # check whether 'monotonic_clock()' is available it may
1203dnl # be available for some archs but not others.
1204dnl #
723aa3b0
ED		 1205AC_DEFUN([SPL_AC_MONOTONIC_CLOCK],
1206 [AC_MSG_CHECKING([whether monotonic_clock() is available])
1207 SPL_LINUX_TRY_COMPILE_SYMBOL([
1208 #include <linux/timex.h>
1209 ], [
1210 monotonic_clock();
1211 ], [monotonic_clock], [], [
1212 AC_MSG_RESULT(yes)
1213 AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
1214 [monotonic_clock() is available])
1215 ], [
1216 AC_MSG_RESULT(no)
1217 ])
3d061e9d 1218])
1219
1220dnl #
1221dnl # 2.6.16 API change,
1222dnl # check whether 'struct inode' has i_mutex
1223dnl #
1224AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
1225 AC_MSG_CHECKING([whether struct inode has i_mutex])
1226 SPL_LINUX_TRY_COMPILE([
1227 #include <linux/fs.h>
1228 #include <linux/mutex.h>
1229 ],[
1230 struct inode i;
1231 mutex_init(&i.i_mutex);
1232 ],[
1233 AC_MSG_RESULT(yes)
1234 AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
1235 ],[
1236 AC_MSG_RESULT(no)
1237 ])
1238])
b61a6e8b 1239
4d54fdee
BB		 1240dnl #
1241dnl # 2.6.29 API change,
1242dnl # Adaptive mutexs introduced.
1243dnl #
1244AC_DEFUN([SPL_AC_MUTEX_OWNER], [
1245 AC_MSG_CHECKING([whether struct mutex has owner])
1246 SPL_LINUX_TRY_COMPILE([
1247 #include <linux/mutex.h>
1248 ],[
03318641 1249 struct mutex mtx __attribute__ ((unused));
4d54fdee
BB		 1250 mtx.owner = NULL;
1251 ],[
1252 AC_MSG_RESULT(yes)
1253 AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
1254 ],[
1255 AC_MSG_RESULT(no)
1256 ])
1257])
1258
86fd39f3
BB		 1259dnl #
1260dnl # 2.6.39 API change,
1261dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
1262dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
1263dnl # was defined. As of 2.6.39 this was changed to a task_struct
1264dnl # pointer which frankly makes a lot more sense.
1265dnl #
1266AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
1267 AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
1268 tmp_flags="$EXTRA_KCFLAGS"
1269 EXTRA_KCFLAGS="-Werror"
1270 SPL_LINUX_TRY_COMPILE([
1271 #include <linux/mutex.h>
a0625691 1272 #include <linux/sched.h>
86fd39f3
BB		 1273 ],[
1274 struct mutex mtx __attribute__ ((unused));
1275 mtx.owner = current;
1276 ],[
1277 AC_MSG_RESULT(yes)
1278 AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
1279 [struct mutex owner is a task_struct])
1280 ],[
1281 AC_MSG_RESULT(no)
1282 ])
1283 EXTRA_KCFLAGS="$tmp_flags"
1284])
1285
6c9433c1
BB		 1286dnl #
1287dnl # 2.6.18 API change,
1288dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
1289dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
1290dnl # if the mutex validator is disabled or otherwise unavailable.
1291dnl #
1292AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
1293 AC_MSG_CHECKING([whether mutex_lock_nested() is available])
1294 SPL_LINUX_TRY_COMPILE([
1295 #include <linux/mutex.h>
1296 ],[
1297 struct mutex mutex;
1298 mutex_init(&mutex);
1299 mutex_lock_nested(&mutex, 0);
1300 ],[
1301 AC_MSG_RESULT(yes)
1302 AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
1303 [mutex_lock_nested() is available])
1304 ],[
1305 AC_MSG_RESULT(no)
1306 ])
1307])
1308
31a033ec
BB		 1309dnl #
1310dnl # 2.6.27 API change,
1311dnl # on_each_cpu() uses 3 args, no 'retry' argument
1312dnl #
1313AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
1314 AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
1315 SPL_LINUX_TRY_COMPILE([
050cd84e 1316 #include <linux/interrupt.h>
31a033ec 1317 #include <linux/smp.h>
050cd84e
BB		 1318
1319 void on_each_cpu_func(void *data) { return; }
31a033ec 1320 ],[
050cd84e 1321 on_each_cpu(on_each_cpu_func, NULL, 0);
31a033ec
BB		 1322 ],[
1323 AC_MSG_RESULT(yes)
1324 AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
1325 [on_each_cpu wants 3 args])
1326 ],[
1327 AC_MSG_RESULT(no)
1328 ])
1329])
36b313da
BB		 1330
1331dnl #
d1ff2312
BB		 1332dnl # 2.6.18 API change,
1333dnl # kallsyms_lookup_name no longer exported
1334dnl #
723aa3b0
ED		 1335AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME],
1336 [AC_MSG_CHECKING([whether kallsyms_lookup_name() is available])
1337 SPL_LINUX_TRY_COMPILE_SYMBOL([
1338 #include <linux/kallsyms.h>
1339 ], [
1340 kallsyms_lookup_name(NULL);
1341 ], [kallsyms_lookup_name], [], [
1342 AC_MSG_RESULT(yes)
1343 AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1344 [kallsyms_lookup_name() is available])
1345 ], [
1346 AC_MSG_RESULT(no)
1347 ])
d1ff2312
BB		 1348])
1349
1350dnl #
e11d6c5f
BB		 1351dnl # Proposed API change,
1352dnl # This symbol is not available in stock kernels. You may build a
1353dnl # custom kernel with the *-spl-export-symbols.patch which will export
1354dnl # these symbols for use. If your already rolling a custom kernel for
1355dnl # your environment this is recommended.
d1ff2312 1356dnl #
723aa3b0
ED		 1357AC_DEFUN([SPL_AC_GET_VMALLOC_INFO],
1358 [AC_MSG_CHECKING([whether get_vmalloc_info() is available])
1359 SPL_CHECK_SYMBOL_EXPORT([get_vmalloc_info], [], [
1360 AC_MSG_RESULT(yes)
1361 AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
1362 [get_vmalloc_info() is available])
1363 ], [
1364 AC_MSG_RESULT(no)
1365 ])
d1ff2312
BB		 1366])
1367
5232d256
BB		 1368dnl #
1369dnl # 2.6.17 API change
1370dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
1371dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
1372dnl # were exported in 2.6.17 for use by modules which was consistent with
1373dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
1374dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
1375dnl # were dropped entirely leaving modules no way to directly iterate over
1376dnl # the zone list. Because we need access to the zone helpers we check
1377dnl # if the kernel contains the old or new implementation. Then we check
1378dnl # to see if the symbols we need for each version are available. If they
1379dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
1380dnl #
1381AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
1382 AC_MSG_CHECKING([whether symbol *_pgdat exist])
1383 grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
1384 rc=$?
1385 if test $rc -eq 0; then
1386 AC_MSG_RESULT([yes])
723aa3b0 1387 AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
5232d256
BB		 1388 else
1389 AC_MSG_RESULT([no])
1390 fi
1391])
1392
d1ff2312 1393dnl #
e11d6c5f
BB		 1394dnl # Proposed API change,
1395dnl # This symbol is not available in stock kernels. You may build a
1396dnl # custom kernel with the *-spl-export-symbols.patch which will export
1397dnl # these symbols for use. If your already rolling a custom kernel for
1398dnl # your environment this is recommended.
36b313da 1399dnl #
723aa3b0
ED		 1400AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT],
1401 [AC_MSG_CHECKING([whether first_online_pgdat() is available])
1402 SPL_LINUX_TRY_COMPILE_SYMBOL([
1403 #include <linux/mmzone.h>
1404 ], [
1405 first_online_pgdat();
1406 ], [first_online_pgdat], [], [
1407 AC_MSG_RESULT(yes)
1408 AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
1409 [first_online_pgdat() is available])
1410 ], [
1411 AC_MSG_RESULT(no)
1412 ])
36b313da
BB		 1413])
1414
1415dnl #
e11d6c5f
BB		 1416dnl # Proposed API change,
1417dnl # This symbol is not available in stock kernels. You may build a
1418dnl # custom kernel with the *-spl-export-symbols.patch which will export
1419dnl # these symbols for use. If your already rolling a custom kernel for
1420dnl # your environment this is recommended.
36b313da 1421dnl #
723aa3b0
ED		 1422AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT],
1423 [AC_MSG_CHECKING([whether next_online_pgdat() is available])
1424 SPL_LINUX_TRY_COMPILE_SYMBOL([
1425 #include <linux/mmzone.h>
1426 ], [
1427 next_online_pgdat(NULL);
1428 ], [next_online_pgdat], [], [
1429 AC_MSG_RESULT(yes)
1430 AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
1431 [next_online_pgdat() is available])
1432 ], [
1433 AC_MSG_RESULT(no)
1434 ])
36b313da
BB		 1435])
1436
1437dnl #
e11d6c5f
BB		 1438dnl # Proposed API change,
1439dnl # This symbol is not available in stock kernels. You may build a
1440dnl # custom kernel with the *-spl-export-symbols.patch which will export
1441dnl # these symbols for use. If your already rolling a custom kernel for
1442dnl # your environment this is recommended.
36b313da 1443dnl #
723aa3b0
ED		 1444AC_DEFUN([SPL_AC_NEXT_ZONE],
1445 [AC_MSG_CHECKING([whether next_zone() is available])
1446 SPL_LINUX_TRY_COMPILE_SYMBOL([
1447 #include <linux/mmzone.h>
1448 ], [
1449 next_zone(NULL);
1450 ], [next_zone], [], [
1451 AC_MSG_RESULT(yes)
1452 AC_DEFINE(HAVE_NEXT_ZONE, 1, [next_zone() is available])
1453 ], [
1454 AC_MSG_RESULT(no)
1455 ])
36b313da 1456])
4ab13d3b 1457
5232d256
BB		 1458dnl #
1459dnl # 2.6.17 API change,
1460dnl # See SPL_AC_PGDAT_HELPERS for details.
1461dnl #
723aa3b0
ED		 1462AC_DEFUN([SPL_AC_PGDAT_LIST],
1463 [AC_MSG_CHECKING([whether pgdat_list is available])
1464 SPL_LINUX_TRY_COMPILE_SYMBOL([
1465 #include <linux/topology.h>
1466 pg_data_t *tmp = pgdat_list;
1467 ], [], [pgdat_list], [], [
1468 AC_MSG_RESULT(yes)
1469 AC_DEFINE(HAVE_PGDAT_LIST, 1, [pgdat_list is available])
1470 ], [
1471 AC_MSG_RESULT(no)
1472 ])
5232d256
BB		 1473])
1474
96dded38
BB		 1475dnl #
1476dnl # 2.6.18 API change,
1477dnl # First introduced global_page_state() support as an inline.
1478dnl #
1479AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
1480 AC_MSG_CHECKING([whether global_page_state() is available])
1481 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1482 #include <linux/mm.h>
96dded38 1483 ],[
03318641 1484 unsigned long state __attribute__ ((unused));
6ae7fef5 1485 state = global_page_state(0);
96dded38
BB		 1486 ],[
1487 AC_MSG_RESULT(yes)
1488 AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
1489 [global_page_state() is available])
1490 ],[
1491 AC_MSG_RESULT(no)
1492 ])
1493])
1494
e11d6c5f 1495dnl #
6ae7fef5
BB		 1496dnl # 2.6.21 API change (plus subsequent naming convention changes),
1497dnl # Public global zone stats now include a free page count. However
1498dnl # the enumerated names of the counters have changed since this API
1499dnl # was introduced. We need to deduce the corrent name to use. This
1500dnl # replaces the priviate get_zone_counts() interface.
1501dnl #
1502dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
1503dnl # is 2.6.30 as of when this was written.
e11d6c5f 1504dnl #
6ae7fef5
BB		 1505AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
1506 AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
e11d6c5f 1507 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1508 #include <linux/mm.h>
e11d6c5f 1509 ],[
03318641 1510 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5 1511 zsi = NR_FREE_PAGES;
e11d6c5f
BB		 1512 ],[
1513 AC_MSG_RESULT(yes)
6ae7fef5
BB		 1514 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
1515 [Page state NR_FREE_PAGES is available])
e11d6c5f
BB		 1516 ],[
1517 AC_MSG_RESULT(no)
1518 ])
1519])
a093c6a4 1520
6ae7fef5
BB		 1521dnl #
1522dnl # 2.6.21 API change (plus subsequent naming convention changes),
1523dnl # Public global zone stats now include an inactive page count. However
1524dnl # the enumerated names of the counters have changed since this API
1525dnl # was introduced. We need to deduce the corrent name to use. This
1526dnl # replaces the priviate get_zone_counts() interface.
1527dnl #
1528dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
1529dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
1530dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
1531dnl #
1532AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
1533 AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
1534 SPL_LINUX_TRY_COMPILE([
1535 #include <linux/mm.h>
1536 ],[
03318641 1537 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1538 zsi = NR_INACTIVE;
1539 ],[
1540 AC_MSG_RESULT(yes)
1541 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
1542 [Page state NR_INACTIVE is available])
1543 ],[
1544 AC_MSG_RESULT(no)
1545 ])
1546
1547 AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
1548 SPL_LINUX_TRY_COMPILE([
1549 #include <linux/mm.h>
1550 ],[
03318641 1551 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1552 zsi = NR_INACTIVE_ANON;
1553 ],[
1554 AC_MSG_RESULT(yes)
1555 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
1556 [Page state NR_INACTIVE_ANON is available])
1557 ],[
1558 AC_MSG_RESULT(no)
1559 ])
1560
1561 AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
1562 SPL_LINUX_TRY_COMPILE([
1563 #include <linux/mm.h>
1564 ],[
03318641 1565 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1566 zsi = NR_INACTIVE_FILE;
1567 ],[
1568 AC_MSG_RESULT(yes)
1569 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
1570 [Page state NR_INACTIVE_FILE is available])
1571 ],[
1572 AC_MSG_RESULT(no)
1573 ])
1574])
1575
1576dnl #
1577dnl # 2.6.21 API change (plus subsequent naming convention changes),
1578dnl # Public global zone stats now include an active page count. However
1579dnl # the enumerated names of the counters have changed since this API
1580dnl # was introduced. We need to deduce the corrent name to use. This
1581dnl # replaces the priviate get_zone_counts() interface.
1582dnl #
1583dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
1584dnl # anonymous and file active pages. As of 2.6.28 it was split in
1585dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
1586dnl #
1587AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
1588 AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
1589 SPL_LINUX_TRY_COMPILE([
1590 #include <linux/mm.h>
1591 ],[
03318641 1592 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1593 zsi = NR_ACTIVE;
1594 ],[
1595 AC_MSG_RESULT(yes)
1596 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
1597 [Page state NR_ACTIVE is available])
1598 ],[
1599 AC_MSG_RESULT(no)
1600 ])
1601
1602 AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON 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_ACTIVE_ANON;
1608 ],[
1609 AC_MSG_RESULT(yes)
1610 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
1611 [Page state NR_ACTIVE_ANON is available])
1612 ],[
1613 AC_MSG_RESULT(no)
1614 ])
1615
1616 AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE 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_ACTIVE_FILE;
1622 ],[
1623 AC_MSG_RESULT(yes)
1624 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
1625 [Page state NR_ACTIVE_FILE is available])
1626 ],[
1627 AC_MSG_RESULT(no)
1628 ])
1629])
1630
1631dnl #
1632dnl # Proposed API change for legacy kernels.
1633dnl # This symbol is not available in older kernels. For kernels post
1634dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
1635dnl # page state information. This symbol is only used in legacy kernels
1636dnl # any only as a last resort.
1637dnl
1638AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
1639 AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
1640 SPL_LINUX_TRY_COMPILE([
1641 ],[
1642 #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
1643 #error "global_page_state needs NR_FREE_PAGES"
1644 #endif
1645
1646 #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
1647 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
1648 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
1649 #error "global_page_state needs NR_ACTIVE*"
1650 #endif
1651
1652 #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
1653 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
1654 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
1655 #error "global_page_state needs NR_INACTIVE*"
1656 #endif
1657 ],[
1658 AC_MSG_RESULT(no)
1659 ],[
1660 AC_MSG_RESULT(yes)
1661 AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
1662 [get_zone_counts() is needed])
1663
723aa3b0
ED		 1664 AC_MSG_CHECKING([whether get_zone_counts() is available])
1665 SPL_LINUX_TRY_COMPILE_SYMBOL([
1666 #include <linux/mmzone.h>
1667 ], [
1668 get_zone_counts(NULL, NULL, NULL);
1669 ], [get_zone_counts], [], [
1670 AC_MSG_RESULT(yes)
1671 AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
1672 [get_zone_counts() is available])
1673 ], [
1674 AC_MSG_RESULT(no)
1675 ])
6ae7fef5
BB		 1676 ])
1677])
1678
7119bf70
BB		 1679dnl #
1680dnl # 2.6.27 API change,
1681dnl # The user_path_dir() replaces __user_walk()
1682dnl #
723aa3b0
ED		 1683AC_DEFUN([SPL_AC_USER_PATH_DIR],
1684 [AC_MSG_CHECKING([whether user_path_dir() is available])
1685 SPL_LINUX_TRY_COMPILE_SYMBOL([
1686 #include <linux/fcntl.h>
1687 #include <linux/namei.h>
1688 ], [
1689 user_path_dir(NULL, NULL);
1690 ], [user_path_at], [], [
1691 AC_MSG_RESULT(yes)
1692 AC_DEFINE(HAVE_USER_PATH_DIR, 1, [user_path_dir() is available])
1693 ], [
1694 AC_MSG_RESULT(no)
1695 ])
7119bf70
BB		 1696])
1697
51a727e9
BB		 1698dnl #
1699dnl # Symbol available in RHEL kernels not in stock kernels.
1700dnl #
723aa3b0
ED		 1701AC_DEFUN([SPL_AC_SET_FS_PWD],
1702 [AC_MSG_CHECKING([whether set_fs_pwd() is available])
1703 SPL_LINUX_TRY_COMPILE_SYMBOL([
1704 #include <linux/spinlock.h>
1705 #include <linux/fs_struct.h>
1706 ], [
1707 (void) set_fs_pwd;
1708 ], [set_fs_pwd], [], [
1709 AC_MSG_RESULT(yes)
1710 AC_DEFINE(HAVE_SET_FS_PWD, 1, [set_fs_pwd() is available])
1711 ], [
1712 AC_MSG_RESULT(no)
1713 ])
51a727e9
BB		 1714])
1715
1716dnl #
1717dnl # 2.6.25 API change,
1718dnl # Simplied API by replacing mnt+dentry args with a single path arg.
1719dnl #
1720AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
1721 [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
1722 SPL_LINUX_TRY_COMPILE([
1723 #include <linux/sched.h>
baf2979e 1724 #include <linux/fs_struct.h>
51a727e9
BB		 1725 ],[
1726 set_fs_pwd(NULL, NULL);
1727 ],[
1728 AC_MSG_RESULT(yes)
1729 AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
1730 [set_fs_pwd() wants 2 args])
1731 ],[
1732 AC_MSG_RESULT(no)
1733 ])
1734])
1735
a093c6a4
BB		 1736dnl #
1737dnl # SLES API change, never adopted in mainline,
1738dnl # Third 'struct vfsmount *' argument removed.
1739dnl #
1740AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
1741 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
1742 SPL_LINUX_TRY_COMPILE([
1743 #include <linux/fs.h>
1744 ],[
1745 vfs_unlink(NULL, NULL);
1746 ],[
1747 AC_MSG_RESULT(yes)
1748 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
1749 [vfs_unlink() wants 2 args])
1750 ],[
1751 AC_MSG_RESULT(no)
1752 ])
1753])
1754
1755dnl #
1756dnl # SLES API change, never adopted in mainline,
1757dnl # Third and sixth 'struct vfsmount *' argument removed.
1758dnl #
1759AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
1760 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
1761 SPL_LINUX_TRY_COMPILE([
1762 #include <linux/fs.h>
1763 ],[
1764 vfs_rename(NULL, NULL, NULL, NULL);
1765 ],[
1766 AC_MSG_RESULT(yes)
1767 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
1768 [vfs_rename() wants 4 args])
1769 ],[
1770 AC_MSG_RESULT(no)
1771 ])
1772])
ec7d53e9 1773
9b2048c2
BB		 1774dnl #
1775dnl # 2.6.36 API change,
1776dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
1777dnl # a spinlock_t to improve the fastpath performance.
1778dnl #
1779AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
1780 AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
97fd6a07
BB		 1781 tmp_flags="$EXTRA_KCFLAGS"
1782 EXTRA_KCFLAGS="-Werror"
9b2048c2
BB		 1783 SPL_LINUX_TRY_COMPILE([
1784 #include <linux/sched.h>
1785 #include <linux/fs_struct.h>
1786 ],[
1787 struct fs_struct fs;
1788 spin_lock_init(&fs.lock);
1789 ],[
1790 AC_MSG_RESULT(yes)
1791 AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
1792 [struct fs_struct uses spinlock_t])
1793 ],[
1794 AC_MSG_RESULT(no)
1795 ])
97fd6a07 1796 EXTRA_KCFLAGS="$tmp_flags"
9b2048c2
BB		 1797])
1798
ec7d53e9
BB		 1799dnl #
1800dnl # 2.6.29 API change,
1801dnl # check whether 'struct cred' exists
1802dnl #
1803AC_DEFUN([SPL_AC_CRED_STRUCT], [
1804 AC_MSG_CHECKING([whether struct cred exists])
1805 SPL_LINUX_TRY_COMPILE([
1806 #include <linux/cred.h>
1807 ],[
03318641 1808 struct cred *cr __attribute__ ((unused));
ec7d53e9
BB		 1809 cr = NULL;
1810 ],[
1811 AC_MSG_RESULT(yes)
1812 AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
1813 ],[
1814 AC_MSG_RESULT(no)
1815 ])
1816])
1817
1818dnl #
e811949a 1819dnl # Custom SPL patch may export this symbol.
ec7d53e9 1820dnl #
723aa3b0
ED		 1821AC_DEFUN([SPL_AC_GROUPS_SEARCH],
1822 [AC_MSG_CHECKING([whether groups_search() is available])
1823 SPL_LINUX_TRY_COMPILE_SYMBOL([
1824 #include <linux/cred.h>
1825 ], [
1826 groups_search(NULL, 0);
1827 ], [groups_search], [], [
1828 AC_MSG_RESULT(yes)
1829 AC_DEFINE(HAVE_GROUPS_SEARCH, 1, [groups_search() is available])
1830 ], [
1831 AC_MSG_RESULT(no)
1832 ])
ec7d53e9 1833])
e811949a
BB		 1834
1835dnl #
1836dnl # 2.6.x API change,
1837dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
1838dnl #
723aa3b0
ED		 1839AC_DEFUN([SPL_AC_PUT_TASK_STRUCT],
1840 [AC_MSG_CHECKING([whether __put_task_struct() is available])
1841 SPL_LINUX_TRY_COMPILE_SYMBOL([
1842 #include <linux/sched.h>
1843 ], [
1844 __put_task_struct(NULL);
1845 ], [__put_task_struct], [], [
1846 AC_MSG_RESULT(yes)
1847 AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
1848 [__put_task_struct() is available])
1849 ], [
1850 AC_MSG_RESULT(no)
1851 ])
e811949a 1852])
3977f837
BB		 1853
1854dnl #
1855dnl # 2.6.32 API change,
1856dnl # Unused 'struct file *' removed from prototype.
1857dnl #
1858AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
1859 AC_MSG_CHECKING([whether proc_handler() wants 5 args])
1860 SPL_LINUX_TRY_COMPILE([
1861 #include <linux/sysctl.h>
1862 ],[
1863 proc_dostring(NULL, 0, NULL, NULL, NULL);
1864 ],[
1865 AC_MSG_RESULT(yes)
1866 AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
1867 [proc_handler() wants 5 args])
1868 ],[
1869 AC_MSG_RESULT(no)
1870 ])
1871])
b868e22f
BB		 1872
1873dnl #
1874dnl # 2.6.x API change,
1875dnl # kvasprintf() function added.
1876dnl #
723aa3b0
ED		 1877AC_DEFUN([SPL_AC_KVASPRINTF],
1878 [AC_MSG_CHECKING([whether kvasprintf() is available])
1879 SPL_LINUX_TRY_COMPILE_SYMBOL([
1880 #include <linux/kernel.h>
1881 ], [
1882 kvasprintf(0, NULL, *((va_list*)NULL));
1883 ], [kvasprintf], [], [
1884 AC_MSG_RESULT(yes)
1885 AC_DEFINE(HAVE_KVASPRINTF, 1, [kvasprintf() is available])
1886 ], [
1887 AC_MSG_RESULT(no)
1888 ])
b868e22f 1889])
f0ff89fc 1890
0d0b5237
BB		 1891dnl #
1892dnl # 2.6.29 API change,
1893dnl # vfs_fsync() funcation added, prior to this use file_fsync().
1894dnl #
723aa3b0
ED		 1895AC_DEFUN([SPL_AC_VFS_FSYNC],
1896 [AC_MSG_CHECKING([whether vfs_fsync() is available])
1897 SPL_LINUX_TRY_COMPILE_SYMBOL([
1898 #include <linux/fs.h>
1899 ], [
1900 (void) vfs_fsync;
1901 ], [vfs_fsync], [fs/sync.c], [
1902 AC_MSG_RESULT(yes)
1903 AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])
1904 ], [
1905 AC_MSG_RESULT(no)
1906 ])
0d0b5237
BB		 1907])
1908
f0ff89fc
BB		 1909dnl #
1910dnl # 2.6.35 API change,
0d0b5237 1911dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
f0ff89fc 1912dnl #
0d0b5237
BB		 1913AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
1914 AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
f0ff89fc 1915 SPL_LINUX_TRY_COMPILE([
0d0b5237 1916 #include <linux/fs.h>
f0ff89fc 1917 ],[
0d0b5237 1918 vfs_fsync(NULL, 0);
f0ff89fc
BB		 1919 ],[
1920 AC_MSG_RESULT(yes)
0d0b5237 1921 AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
f0ff89fc
BB		 1922 ],[
1923 AC_MSG_RESULT(no)
1924 ])
1925])
46aa7b39 1926
bbdc6ae4
ED		 1927dnl #
1928dnl # 3.5 API change,
1929dnl # inode_operations.truncate_range removed
bbdc6ae4
ED		 1930dnl #
1931AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
1932 AC_MSG_CHECKING([whether truncate_range() inode operation is available])
1933 SPL_LINUX_TRY_COMPILE([
1934 #include <linux/fs.h>
1935 ],[
1936 struct inode_operations ops;
1937 ops.truncate_range = NULL;
1938 ],[
1939 AC_MSG_RESULT(yes)
1940 AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
1941 [truncate_range() inode operation is available])
1942 ],[
1943 AC_MSG_RESULT(no)
1944 ])
1c7b3eaf
BB		 1945])
1946
1947dnl #
1948dnl # Linux 2.6.38 - 3.x API
1949dnl #
1950AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
1951 AC_MSG_CHECKING([whether fops->fallocate() exists])
1952 SPL_LINUX_TRY_COMPILE([
1953 #include <linux/fs.h>
1954 ],[
1955 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
1956 struct file_operations fops __attribute__ ((unused)) = {
1957 .fallocate = fallocate,
1958 };
1959 ],[
1960 AC_MSG_RESULT(yes)
1961 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
1962 ],[
1963 AC_MSG_RESULT(no)
1964 ])
1965])
1966
1967dnl #
1968dnl # Linux 2.6.x - 2.6.37 API
1969dnl #
1970AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
1971 AC_MSG_CHECKING([whether iops->fallocate() exists])
1972 SPL_LINUX_TRY_COMPILE([
1973 #include <linux/fs.h>
1974 ],[
1975 long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
1976 struct inode_operations fops __attribute__ ((unused)) = {
1977 .fallocate = fallocate,
1978 };
1979 ],[
1980 AC_MSG_RESULT(yes)
1981 AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
1982 ],[
1983 AC_MSG_RESULT(no)
1984 ])
1985])
1986
1987dnl #
1988dnl # PaX Linux 2.6.38 - 3.x API
1989dnl #
1990AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
1991 AC_MSG_CHECKING([whether fops->fallocate() exists])
1992 SPL_LINUX_TRY_COMPILE([
1993 #include <linux/fs.h>
1994 ],[
1995 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
1996 struct file_operations_no_const fops __attribute__ ((unused)) = {
1997 .fallocate = fallocate,
1998 };
1999 ],[
2000 AC_MSG_RESULT(yes)
2001 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
2002 ],[
2003 AC_MSG_RESULT(no)
2004 ])
2005])
2006
2007dnl #
2008dnl # The fallocate callback was moved from the inode_operations
2009dnl # structure to the file_operations structure.
2010dnl #
2011AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
2012 SPL_AC_KERNEL_FILE_FALLOCATE
2013 SPL_AC_KERNEL_INODE_FALLOCATE
2014 SPL_AC_PAX_KERNEL_FILE_FALLOCATE
2015])
bbdc6ae4 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 2037
e76f4bf1
BB		 2038dnl #
2039dnl # 2.6.xx API compat,
2040dnl # There currently exists no exposed API to partially shrink the dcache.
2041dnl # The expected mechanism to shrink the cache is a registered shrinker
2042dnl # which is called during memory pressure.
2043dnl #
723aa3b0
ED		 2044AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY],
2045 [AC_MSG_CHECKING([whether shrink_dcache_memory() is available])
2046 SPL_LINUX_TRY_COMPILE_SYMBOL([
2047 #include <linux/dcache.h>
2048 ], [
2049 shrink_dcache_memory(0, 0);
2050 ], [shrink_dcache_memory], [fs/dcache.c], [
2051 AC_MSG_RESULT(yes)
2052 AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
2053 [shrink_dcache_memory() is available])
2054 ], [
2055 AC_MSG_RESULT(no)
2056 ])
e76f4bf1
BB		 2057])
2058
2059dnl #
2060dnl # 2.6.xx API compat,
2061dnl # There currently exists no exposed API to partially shrink the icache.
2062dnl # The expected mechanism to shrink the cache is a registered shrinker
2063dnl # which is called during memory pressure.
2064dnl #
723aa3b0
ED		 2065AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY],
2066 [AC_MSG_CHECKING([whether shrink_icache_memory() is available])
2067 SPL_LINUX_TRY_COMPILE_SYMBOL([
2068 #include <linux/dcache.h>
2069 ], [
2070 shrink_icache_memory(0, 0);
2071 ], [shrink_icache_memory], [fs/inode.c], [
2072 AC_MSG_RESULT(yes)
2073 AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
2074 [shrink_icache_memory() is available])
2075 ], [
2076 AC_MSG_RESULT(no)
2077 ])
e76f4bf1 2078])
b1cbc461
BB		 2079
2080dnl #
2081dnl # 2.6.39 API compat,
2082dnl # The path_lookup() function has been renamed to kern_path_parent()
2083dnl # and the flags argument has been removed. The only behavior now
2084dnl # offered is that of LOOKUP_PARENT. The spl already always passed
2085dnl # this flag so dropping the flag does not impact us.
2086dnl #
12ff95ff
BB		 2087AC_DEFUN([SPL_AC_KERN_PATH_PARENT_HEADER], [
2088 SPL_CHECK_SYMBOL_HEADER(
2089 [kern_path_parent],
2090 [int kern_path_parent(const char \*, struct nameidata \*)],
2091 [include/linux/namei.h],
2092 [AC_DEFINE(HAVE_KERN_PATH_PARENT_HEADER, 1,
2093 [kern_path_parent() is available])],
2094 [])
2095])
2096
2097dnl #
2098dnl # 3.1 API compat,
2099dnl # The kern_path_parent() symbol is no longer exported by the kernel.
2100dnl # However, it remains the prefered interface and since we still have
2101dnl # access to the prototype we dynamically lookup the required address.
2102dnl #
723aa3b0
ED		 2103AC_DEFUN([SPL_AC_KERN_PATH_PARENT_SYMBOL],
2104 [AC_MSG_CHECKING([whether kern_path_parent() is available])
2105 SPL_LINUX_TRY_COMPILE_SYMBOL([
2106 #include <linux/namei.h>
2107 ], [
2108 kern_path_parent(NULL, NULL);
2109 ], [kern_path_parent], [fs/namei.c], [
2110 AC_MSG_RESULT(yes)
2111 AC_DEFINE(HAVE_KERN_PATH_PARENT_SYMBOL, 1,
2112 [kern_path_parent() is available])
2113 ], [
2114 AC_MSG_RESULT(no)
2115 ])
b1cbc461 2116])
3dfc591a 2117
bcb15891
YS		 2118dnl #
2119dnl # 3.6 API compat,
2120dnl # The kern_path_parent() function was replaced by the kern_path_locked()
2121dnl # function to eliminate all struct nameidata usage outside fs/namei.c.
2122dnl #
2123AC_DEFUN([SPL_AC_KERN_PATH_LOCKED], [
2124 SPL_CHECK_SYMBOL_HEADER(
2125 [kern_path_locked],
2126 [struct dentry \*kern_path_locked(const char \*, struct path \*)],
2127 [include/linux/namei.h],
2128 [AC_DEFINE(HAVE_KERN_PATH_LOCKED, 1,
2129 [kern_path_locked() is available])],
2130 [])
2131])
2132
de081a2a
BB		 2133dnl #
2134dnl # /proc/kallsyms support,
2135dnl # Verify the kernel has CONFIG_KALLSYMS support enabled.
2136dnl #
2137AC_DEFUN([SPL_AC_CONFIG_KALLSYMS], [
2138 AC_MSG_CHECKING([whether CONFIG_KALLSYMS is defined])
2139 SPL_LINUX_TRY_COMPILE([
2140 #if !defined(CONFIG_KALLSYMS)
2141 #error CONFIG_KALLSYMS not defined
2142 #endif
2143 ],[ ],[
2144 AC_MSG_RESULT([yes])
2145 ],[
2146 AC_MSG_RESULT([no])
2147 AC_MSG_ERROR([
2148 *** This kernel does not include the required kallsyms support.
2149 *** Rebuild the kernel with CONFIG_KALLSYMS=y set.])
2150 ])
2151])
2152
42b3ce62
BB		 2153dnl #
2154dnl # zlib inflate compat,
2155dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
2156dnl #
2157AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
2158 AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
2159 SPL_LINUX_TRY_COMPILE([
2160 #if !defined(CONFIG_ZLIB_INFLATE) && \
2161 !defined(CONFIG_ZLIB_INFLATE_MODULE)
2162 #error CONFIG_ZLIB_INFLATE not defined
2163 #endif
2164 ],[ ],[
2165 AC_MSG_RESULT([yes])
2166 ],[
2167 AC_MSG_RESULT([no])
2168 AC_MSG_ERROR([
2169 *** This kernel does not include the required zlib inflate support.
2170 *** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
2171 ])
2172])
2173
2174dnl #
2175dnl # zlib deflate compat,
2176dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
2177dnl #
2178AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
2179 AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
2180 SPL_LINUX_TRY_COMPILE([
2181 #if !defined(CONFIG_ZLIB_DEFLATE) && \
2182 !defined(CONFIG_ZLIB_DEFLATE_MODULE)
2183 #error CONFIG_ZLIB_DEFLATE not defined
2184 #endif
2185 ],[ ],[
2186 AC_MSG_RESULT([yes])
2187 ],[
2188 AC_MSG_RESULT([no])
2189 AC_MSG_ERROR([
2190 *** This kernel does not include the required zlib deflate support.
2191 *** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
2192 ])
2193])
2194
3dfc591a
BB		 2195dnl #
2196dnl # 2.6.39 API compat,
2197dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
2198dnl # This was done to avoid always having to allocate the maximum size
2199dnl # workspace (268K). The caller can now specific the windowBits and
2200dnl # memLevel compression parameters to get a smaller workspace.
2201dnl #
2202AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
2203 [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
2204 SPL_LINUX_TRY_COMPILE([
2205 #include <linux/zlib.h>
2206 ],[
2207 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
2208 ],[
2209 AC_MSG_RESULT(yes)
2210 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
2211 [zlib_deflate_workspacesize() wants 2 args])
2212 ],[
2213 AC_MSG_RESULT(no)
2214 ])
2215])
a55bcaad
BB		 2216
2217dnl #
2218dnl # 2.6.39 API change,
2219dnl # Shrinker adjust to use common shrink_control structure.
2220dnl #
2221AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
2222 AC_MSG_CHECKING([whether struct shrink_control exists])
2223 SPL_LINUX_TRY_COMPILE([
2224 #include <linux/mm.h>
2225 ],[
2226 struct shrink_control sc __attribute__ ((unused));
2227
2228 sc.nr_to_scan = 0;
2229 sc.gfp_mask = GFP_KERNEL;
2230 ],[
2231 AC_MSG_RESULT(yes)
2232 AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
2233 [struct shrink_control exists])
2234 ],[
2235 AC_MSG_RESULT(no)
2236 ])
2237])
588d9004
DH		 2238
2239dnl #
2240dnl # 3.1 API Change
2241dnl #
2242dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
2243dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
2244dnl #
2245AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
2246 AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
2247 tmp_flags="$EXTRA_KCFLAGS"
2248 EXTRA_KCFLAGS="-Werror"
2249 SPL_LINUX_TRY_COMPILE([
2250 #include <linux/rwsem.h>
2251 ],[
2252 struct rw_semaphore dummy_semaphore __attribute__ ((unused));
2253 raw_spinlock_t dummy_lock __attribute__ ((unused));
2254 dummy_semaphore.wait_lock = dummy_lock;
2255 ],[
2256 AC_MSG_RESULT(yes)
2257 AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
2258 [struct rw_semaphore member wait_lock is raw_spinlock_t])
2259 ],[
2260 AC_MSG_RESULT(no)
2261 ])
2262 EXTRA_KCFLAGS="$tmp_flags"
2263])
mirror of SPL module used by << 0.8.x ZFSOnLinux