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Remove i_mutex() configure check
[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
c3d9c0df 26 SPL_AC_SHRINKER_CALLBACK
79a3bf13 27 SPL_AC_CTL_NAME
c02ab72f 28 SPL_AC_VMALLOC_INFO
1ddf9722 29 SPL_AC_PDE_DATA
4d54fdee 30 SPL_AC_MUTEX_OWNER
86fd39f3 31 SPL_AC_MUTEX_OWNER_TASK_STRUCT
86933a6e 32 SPL_AC_MUTEX_LOCK_NESTED
86933a6e
BB		 33 SPL_AC_3ARGS_ON_EACH_CPU
34 SPL_AC_KALLSYMS_LOOKUP_NAME
35 SPL_AC_GET_VMALLOC_INFO
36 SPL_AC_PGDAT_HELPERS
37 SPL_AC_FIRST_ONLINE_PGDAT
38 SPL_AC_NEXT_ONLINE_PGDAT
39 SPL_AC_NEXT_ZONE
40 SPL_AC_PGDAT_LIST
86933a6e 41 SPL_AC_GLOBAL_PAGE_STATE
6ae7fef5
BB		 42 SPL_AC_ZONE_STAT_ITEM_FREE
43 SPL_AC_ZONE_STAT_ITEM_INACTIVE
44 SPL_AC_ZONE_STAT_ITEM_ACTIVE
45 SPL_AC_GET_ZONE_COUNTS
7119bf70 46 SPL_AC_USER_PATH_DIR
51a727e9 47 SPL_AC_SET_FS_PWD
a54718cf 48 SPL_AC_SET_FS_PWD_WITH_CONST
86933a6e
BB		 49 SPL_AC_2ARGS_VFS_UNLINK
50 SPL_AC_4ARGS_VFS_RENAME
0d0b5237
BB		 51 SPL_AC_VFS_FSYNC
52 SPL_AC_2ARGS_VFS_FSYNC
bbdc6ae4 53 SPL_AC_INODE_TRUNCATE_RANGE
9b2048c2 54 SPL_AC_FS_STRUCT_SPINLOCK
ec7d53e9 55 SPL_AC_CRED_STRUCT
f7fd6ddd 56 SPL_AC_KUIDGID_T
ec7d53e9 57 SPL_AC_GROUPS_SEARCH
e811949a 58 SPL_AC_PUT_TASK_STRUCT
3977f837 59 SPL_AC_5ARGS_PROC_HANDLER
b868e22f 60 SPL_AC_KVASPRINTF
46aa7b39 61 SPL_AC_EXPORTED_RWSEM_IS_LOCKED
1c7b3eaf 62 SPL_AC_KERNEL_FALLOCATE
e76f4bf1
BB		 63 SPL_AC_SHRINK_DCACHE_MEMORY
64 SPL_AC_SHRINK_ICACHE_MEMORY
ec18fe3c 65 SPL_AC_KERN_PATH
de081a2a 66 SPL_AC_CONFIG_KALLSYMS
42b3ce62
BB		 67 SPL_AC_CONFIG_ZLIB_INFLATE
68 SPL_AC_CONFIG_ZLIB_DEFLATE
3dfc591a 69 SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
a55bcaad 70 SPL_AC_SHRINK_CONTROL_STRUCT
588d9004 71 SPL_AC_RWSEM_SPINLOCK_IS_RAW
10087fe1 72 SPL_AC_SCHED_RT_HEADER
2a305c34 73 SPL_AC_2ARGS_VFS_GETATTR
184c6873 74 SPL_AC_USLEEP_RANGE
a073aeb0 75 SPL_AC_KMEM_CACHE_ALLOCFLAGS
2fc44f66 76 SPL_AC_WAIT_ON_BIT
86933a6e
BB		 77])
78
79AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
bb339d06 80 modpost=$LINUX/scripts/Makefile.modpost
86933a6e 81 AC_MSG_CHECKING([kernel file name for module symbols])
0408008b 82 if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
bb339d06
BB		 83 if grep -q Modules.symvers $modpost; then
84 LINUX_SYMBOLS=Modules.symvers
85 else
86 LINUX_SYMBOLS=Module.symvers
87 fi
912fd84d
BB		 88
89 if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
90 AC_MSG_ERROR([
91 *** Please make sure the kernel devel package for your distribution
7a8a6393 92 *** is installed. If you are building with a custom kernel, make sure the
912fd84d
BB		 93 *** kernel is configured, built, and the '--with-linux=PATH' configure
94 *** option refers to the location of the kernel source.])
95 fi
86933a6e 96 else
bb339d06 97 LINUX_SYMBOLS=NONE
86933a6e
BB		 98 fi
99 AC_MSG_RESULT($LINUX_SYMBOLS)
100 AC_SUBST(LINUX_SYMBOLS)
101])
102
57d86234 103AC_DEFUN([SPL_AC_KERNEL], [
57d86234 104 AC_ARG_WITH([linux],
105 AS_HELP_STRING([--with-linux=PATH],
106 [Path to kernel source]),
39a3d2a4 107 [kernelsrc="$withval"])
57d86234 108
109 AC_ARG_WITH([linux-obj],
110 AS_HELP_STRING([--with-linux-obj=PATH],
111 [Path to kernel build objects]),
112 [kernelbuild="$withval"])
113
114 AC_MSG_CHECKING([kernel source directory])
115 if test -z "$kernelsrc"; then
22ccfaa8
BB		 116 if test -e "/lib/modules/$(uname -r)/source"; then
117 headersdir="/lib/modules/$(uname -r)/source"
118 sourcelink=$(readlink -f "$headersdir")
119 elif test -e "/lib/modules/$(uname -r)/build"; then
120 headersdir="/lib/modules/$(uname -r)/build"
534c4e38
BM		 121 sourcelink=$(readlink -f "$headersdir")
122 else
123 sourcelink=$(ls -1d /usr/src/kernels/* \
723aa3b0 124 /usr/src/linux-* \
534c4e38
BM		 125 2>/dev/null | grep -v obj | tail -1)
126 fi
57d86234 127
8fd4e3af 128 if test -n "$sourcelink" && test -e ${sourcelink}; then
d4326403 129 kernelsrc=`readlink -f ${sourcelink}`
d4326403 130 else
251677e9 131 kernelsrc="[Not found]"
57d86234 132 fi
c5f70460
BB		 133 else
134 if test "$kernelsrc" = "NONE"; then
135 kernsrcver=NONE
136 fi
57d86234 137 fi
138
139 AC_MSG_RESULT([$kernelsrc])
251677e9
BB		 140 if test ! -d "$kernelsrc"; then
141 AC_MSG_ERROR([
142 *** Please make sure the kernel devel package for your distribution
7a8a6393 143 *** is installed and then try again. If that fails, you can specify the
251677e9
BB		 144 *** location of the kernel source with the '--with-linux=PATH' option.])
145 fi
146
57d86234 147 AC_MSG_CHECKING([kernel build directory])
39a3d2a4 148 if test -z "$kernelbuild"; then
22ccfaa8
BB		 149 if test -e "/lib/modules/$(uname -r)/build"; then
150 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
151 elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
e2d28a37
BB		 152 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
153 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
154 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
155 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
156 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
39a3d2a4
BB		 157 else
158 kernelbuild=${kernelsrc}
159 fi
bf338d8d 160 fi
57d86234 161 AC_MSG_RESULT([$kernelbuild])
162
163 AC_MSG_CHECKING([kernel source version])
fd921c2e
BB		 164 utsrelease1=$kernelbuild/include/linux/version.h
165 utsrelease2=$kernelbuild/include/linux/utsrelease.h
166 utsrelease3=$kernelbuild/include/generated/utsrelease.h
167 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
168 utsrelease=linux/version.h
169 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
170 utsrelease=linux/utsrelease.h
171 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
172 utsrelease=generated/utsrelease.h
173 fi
57d86234 174
fd921c2e
BB		 175 if test "$utsrelease"; then
176 kernsrcver=`(echo "#include <$utsrelease>";
57d86234 177 echo "kernsrcver=UTS_RELEASE") |
d4326403 178 cpp -I $kernelbuild/include |
57d86234 179 grep "^kernsrcver=" | cut -d \" -f 2`
57d86234 180
fd921c2e
BB		 181 if test -z "$kernsrcver"; then
182 AC_MSG_RESULT([Not found])
183 AC_MSG_ERROR([*** Cannot determine kernel version.])
184 fi
185 else
57d86234 186 AC_MSG_RESULT([Not found])
0408008b
ED		 187 if test "x$enable_linux_builtin" != xyes; then
188 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
189 else
190 AC_MSG_ERROR([
191 *** Cannot find UTS_RELEASE definition.
192 *** Please run 'make prepare' inside the kernel source tree.])
193 fi
57d86234 194 fi
195
196 AC_MSG_RESULT([$kernsrcver])
197
57d86234 198 LINUX=${kernelsrc}
199 LINUX_OBJ=${kernelbuild}
c5f70460
BB		 200 LINUX_VERSION=${kernsrcver}
201
57d86234 202 AC_SUBST(LINUX)
203 AC_SUBST(LINUX_OBJ)
c5f70460 204 AC_SUBST(LINUX_VERSION)
57d86234 205
86933a6e 206 SPL_AC_MODULE_SYMVERS
2e0e7e69
BB		 207])
208
287b2fb1
BB		 209dnl #
210dnl # Default SPL user configuration
211dnl #
ad35b6a6 212AC_DEFUN([SPL_AC_CONFIG_USER], [])
287b2fb1
BB		 213
214dnl #
215dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
7a8a6393 216dnl # are missing, it is non-fatal, but you will not be able to build
287b2fb1
BB		 217dnl # RPM packages and will be warned if you try too.
218dnl #
7a8a6393 219dnl # By default, the generic spec file will be used because it requires
493972c8
BB		 220dnl # minimal dependencies. Distribution specific spec files can be
221dnl # placed under the 'rpm/<distribution>' directory and enabled using
222dnl # the --with-spec=<distribution> configure option.
223dnl #
287b2fb1
BB		 224AC_DEFUN([SPL_AC_RPM], [
225 RPM=rpm
226 RPMBUILD=rpmbuild
227
228 AC_MSG_CHECKING([whether $RPM is available])
229 AS_IF([tmp=$($RPM --version 2>/dev/null)], [
230 RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
231 HAVE_RPM=yes
232 AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
233 ],[
234 HAVE_RPM=no
235 AC_MSG_RESULT([$HAVE_RPM])
236 ])
237
238 AC_MSG_CHECKING([whether $RPMBUILD is available])
239 AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
240 RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
241 HAVE_RPMBUILD=yes
242 AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
243 ],[
244 HAVE_RPMBUILD=no
245 AC_MSG_RESULT([$HAVE_RPMBUILD])
246 ])
247
493972c8
BB		 248 RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1" --define "$(DEBUG_LOG) 1" --define "$(DEBUG_KMEM) 1" --define "$(DEBUG_KMEM_TRACKING) 1"'
249 RPM_DEFINE_UTIL=
250 RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
251 RPM_DEFINE_DKMS=
252
253 SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
254 SRPM_DEFINE_UTIL=
255 SRPM_DEFINE_KMOD=
256 SRPM_DEFINE_DKMS=
257
258 RPM_SPEC_DIR="rpm/generic"
259 AC_ARG_WITH([spec],
260 AS_HELP_STRING([--with-spec=SPEC],
261 [Spec files 'generic|fedora']),
262 [RPM_SPEC_DIR="rpm/$withval"])
263
264 AC_MSG_CHECKING([whether spec files are available])
265 AC_MSG_RESULT([yes ($RPM_SPEC_DIR/*.spec.in)])
266
287b2fb1
BB		 267 AC_SUBST(HAVE_RPM)
268 AC_SUBST(RPM)
269 AC_SUBST(RPM_VERSION)
270
271 AC_SUBST(HAVE_RPMBUILD)
272 AC_SUBST(RPMBUILD)
273 AC_SUBST(RPMBUILD_VERSION)
493972c8
BB		 274
275 AC_SUBST(RPM_SPEC_DIR)
276 AC_SUBST(RPM_DEFINE_UTIL)
277 AC_SUBST(RPM_DEFINE_KMOD)
278 AC_SUBST(RPM_DEFINE_DKMS)
279 AC_SUBST(RPM_DEFINE_COMMON)
280 AC_SUBST(SRPM_DEFINE_UTIL)
281 AC_SUBST(SRPM_DEFINE_KMOD)
282 AC_SUBST(SRPM_DEFINE_DKMS)
283 AC_SUBST(SRPM_DEFINE_COMMON)
287b2fb1
BB		 284])
285
286dnl #
287dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
288dnl # tools are missing it is non-fatal but you will not be able to build
289dnl # DEB packages and will be warned if you try too.
290dnl #
291AC_DEFUN([SPL_AC_DPKG], [
292 DPKG=dpkg
293 DPKGBUILD=dpkg-buildpackage
294
295 AC_MSG_CHECKING([whether $DPKG is available])
296 AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
297 DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
298 HAVE_DPKG=yes
299 AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
300 ],[
301 HAVE_DPKG=no
302 AC_MSG_RESULT([$HAVE_DPKG])
303 ])
304
305 AC_MSG_CHECKING([whether $DPKGBUILD is available])
306 AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
307 DPKGBUILD_VERSION=$(echo $tmp | \
308 $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
309 HAVE_DPKGBUILD=yes
310 AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
311 ],[
312 HAVE_DPKGBUILD=no
313 AC_MSG_RESULT([$HAVE_DPKGBUILD])
314 ])
315
316 AC_SUBST(HAVE_DPKG)
317 AC_SUBST(DPKG)
318 AC_SUBST(DPKG_VERSION)
319
320 AC_SUBST(HAVE_DPKGBUILD)
321 AC_SUBST(DPKGBUILD)
322 AC_SUBST(DPKGBUILD_VERSION)
323])
324
325dnl #
326dnl # Until native packaging for various different packing systems
327dnl # can be added the least we can do is attempt to use alien to
328dnl # convert the RPM packages to the needed package type. This is
329dnl # a hack but so far it has worked reasonable well.
330dnl #
331AC_DEFUN([SPL_AC_ALIEN], [
332 ALIEN=alien
333
334 AC_MSG_CHECKING([whether $ALIEN is available])
335 AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
336 ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
337 HAVE_ALIEN=yes
338 AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
339 ],[
340 HAVE_ALIEN=no
341 AC_MSG_RESULT([$HAVE_ALIEN])
342 ])
343
344 AC_SUBST(HAVE_ALIEN)
345 AC_SUBST(ALIEN)
346 AC_SUBST(ALIEN_VERSION)
347])
348
349dnl #
350dnl # Using the VENDOR tag from config.guess set the default
351dnl # package type for 'make pkg': (rpm | deb | tgz)
352dnl #
353AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
73fc084e 354 AC_MSG_CHECKING([linux distribution])
a3a69b74
BB		 355 if test -f /etc/toss-release ; then
356 VENDOR=toss ;
73fc084e
BB		 357 elif test -f /etc/fedora-release ; then
358 VENDOR=fedora ;
a3a69b74
BB		 359 elif test -f /etc/redhat-release ; then
360 VENDOR=redhat ;
361 elif test -f /etc/gentoo-release ; then
362 VENDOR=gentoo ;
cd2817f8
PS		 363 elif test -f /etc/arch-release ; then
364 VENDOR=arch ;
73fc084e
BB		 365 elif test -f /etc/SuSE-release ; then
366 VENDOR=sles ;
367 elif test -f /etc/slackware-version ; then
368 VENDOR=slackware ;
a3a69b74
BB		 369 elif test -f /etc/lunar.release ; then
370 VENDOR=lunar ;
371 elif test -f /etc/lsb-release ; then
372 VENDOR=ubuntu ;
373 elif test -f /etc/debian_version ; then
374 VENDOR=debian ;
73fc084e
BB		 375 else
376 VENDOR= ;
377 fi
378 AC_MSG_RESULT([$VENDOR])
379 AC_SUBST(VENDOR)
287b2fb1
BB		 380
381 AC_MSG_CHECKING([default package type])
382 case "$VENDOR" in
a3a69b74
BB		 383 toss) DEFAULT_PACKAGE=rpm ;;
384 redhat) DEFAULT_PACKAGE=rpm ;;
385 fedora) DEFAULT_PACKAGE=rpm ;;
386 gentoo) DEFAULT_PACKAGE=tgz ;;
5f0a4b08 387 arch) DEFAULT_PACKAGE=tgz ;;
a3a69b74
BB		 388 sles) DEFAULT_PACKAGE=rpm ;;
389 slackware) DEFAULT_PACKAGE=tgz ;;
390 lunar) DEFAULT_PACKAGE=tgz ;;
391 ubuntu) DEFAULT_PACKAGE=deb ;;
392 debian) DEFAULT_PACKAGE=deb ;;
393 *) DEFAULT_PACKAGE=rpm ;;
287b2fb1
BB		 394 esac
395
396 AC_MSG_RESULT([$DEFAULT_PACKAGE])
397 AC_SUBST(DEFAULT_PACKAGE)
398])
399
400dnl #
401dnl # Default SPL user configuration
402dnl #
403AC_DEFUN([SPL_AC_PACKAGE], [
0b14b9f3 404 SPL_AC_DEFAULT_PACKAGE
287b2fb1
BB		 405 SPL_AC_RPM
406 SPL_AC_DPKG
407 SPL_AC_ALIEN
287b2fb1
BB		 408])
409
6a1c3d41 410AC_DEFUN([SPL_AC_LICENSE], [
62032954
BB		 411 AC_MSG_CHECKING([spl author])
412 AC_MSG_RESULT([$SPL_META_AUTHOR])
413
86933a6e 414 AC_MSG_CHECKING([spl license])
62032954 415 AC_MSG_RESULT([$SPL_META_LICENSE])
86933a6e
BB		 416])
417
418AC_DEFUN([SPL_AC_CONFIG], [
0408008b
ED		 419 SPL_CONFIG=all
420 AC_ARG_WITH([config],
421 AS_HELP_STRING([--with-config=CONFIG],
422 [Config file 'kernel|user|all|srpm']),
423 [SPL_CONFIG="$withval"])
424 AC_ARG_ENABLE([linux-builtin],
425 [AC_HELP_STRING([--enable-linux-builtin],
426 [Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
427 [],
428 [enable_linux_builtin=no])
429
430 AC_MSG_CHECKING([spl config])
431 AC_MSG_RESULT([$SPL_CONFIG]);
432 AC_SUBST(SPL_CONFIG)
433
434 case "$SPL_CONFIG" in
435 kernel) SPL_AC_CONFIG_KERNEL ;;
436 user) SPL_AC_CONFIG_USER ;;
437 all) SPL_AC_CONFIG_KERNEL
438 SPL_AC_CONFIG_USER ;;
c1541dfe 439 srpm) ;;
0408008b
ED		 440 *)
441 AC_MSG_RESULT([Error!])
442 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
443 user kernel|user|all|srpm]) ;;
444 esac
445
446 AM_CONDITIONAL([CONFIG_USER],
447 [test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
448 AM_CONDITIONAL([CONFIG_KERNEL],
449 [test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
450 [test "x$enable_linux_builtin" != xyes ])
6a1c3d41 451])
452
055ffd98
BB		 453dnl #
454dnl # Enable if the SPL should be compiled with internal debugging enabled.
455dnl # By default this support is disabled.
456dnl #
57d86234 457AC_DEFUN([SPL_AC_DEBUG], [
c950d148 458 AC_MSG_CHECKING([whether debugging is enabled])
055ffd98
BB		 459 AC_ARG_ENABLE([debug],
460 [AS_HELP_STRING([--enable-debug],
461 [Enable generic debug support @<:@default=no@:>@])],
462 [],
463 [enable_debug=no])
464
465 AS_IF([test "x$enable_debug" = xyes],
c950d148 466 [
c950d148
BB		 467 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
468 DEBUG_CFLAGS="-DDEBUG -Werror"
3c208a54
BB		 469 DEBUG_SPL="_with_debug"
470 ], [
c950d148
BB		 471 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
472 DEBUG_CFLAGS="-DNDEBUG"
3c208a54 473 DEBUG_SPL="_without_debug"
c950d148 474 ])
055ffd98 475
c950d148 476 AC_SUBST(DEBUG_CFLAGS)
3c208a54 477 AC_SUBST(DEBUG_SPL)
055ffd98 478 AC_MSG_RESULT([$enable_debug])
57d86234 479])
480
4b2220f0
BB		 481dnl #
482dnl # Enabled by default it provides a basic debug log infrastructure.
483dnl # Each subsystem registers itself with a name and logs messages
484dnl # using predefined types. If the debug mask it set to allow the
485dnl # message type it will be written to the internal log. The log
486dnl # can be dumped to a file by echoing 1 to the 'dump' proc entry,
487dnl # after dumping the log it must be decoded using the spl utility.
488dnl #
489dnl # echo 1 >/proc/sys/kernel/spl/debug/dump
490dnl # spl /tmp/spl-log.xxx.yyy /tmp/spl-log.xxx.yyy.txt
491dnl #
492AC_DEFUN([SPL_AC_DEBUG_LOG], [
493 AC_ARG_ENABLE([debug-log],
494 [AS_HELP_STRING([--enable-debug-log],
495 [Enable basic debug logging @<:@default=yes@:>@])],
496 [],
497 [enable_debug_log=yes])
498
499 AS_IF([test "x$enable_debug_log" = xyes],
3c208a54
BB		 500 [
501 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_LOG"
502 DEBUG_LOG="_with_debug_log"
503 AC_DEFINE([DEBUG_LOG], [1],
4b2220f0 504 [Define to 1 to enable basic debug logging])
3c208a54
BB		 505 ], [
506 DEBUG_LOG="_without_debug_log"
507 ])
4b2220f0 508
3c208a54 509 AC_SUBST(DEBUG_LOG)
4b2220f0
BB		 510 AC_MSG_CHECKING([whether basic debug logging is enabled])
511 AC_MSG_RESULT([$enable_debug_log])
512])
513
055ffd98
BB		 514dnl #
515dnl # Enabled by default it provides a minimal level of memory tracking.
516dnl # A total count of bytes allocated is kept for each alloc and free.
517dnl # Then at module unload time a report to the console will be printed
518dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
519dnl # and provide an easy way to inspect the kmem based slab.
520dnl #
57d86234 521AC_DEFUN([SPL_AC_DEBUG_KMEM], [
055ffd98
BB		 522 AC_ARG_ENABLE([debug-kmem],
523 [AS_HELP_STRING([--enable-debug-kmem],
524 [Enable basic kmem accounting @<:@default=yes@:>@])],
525 [],
526 [enable_debug_kmem=yes])
57d86234 527
055ffd98 528 AS_IF([test "x$enable_debug_kmem" = xyes],
3c208a54
BB		 529 [
530 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
531 DEBUG_KMEM="_with_debug_kmem"
532 AC_DEFINE([DEBUG_KMEM], [1],
055ffd98 533 [Define to 1 to enable basic kmem accounting])
3c208a54
BB		 534 ], [
535 DEBUG_KMEM="_without_debug_kmem"
536 ])
055ffd98 537
3c208a54 538 AC_SUBST(DEBUG_KMEM)
055ffd98
BB		 539 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
540 AC_MSG_RESULT([$enable_debug_kmem])
57d86234 541])
542
055ffd98
BB		 543dnl #
544dnl # Disabled by default it provides detailed memory tracking. This
545dnl # feature also requires --enable-debug-kmem to be set. When enabled
546dnl # not only will total bytes be tracked but also the location of every
547dnl # alloc and free. When the SPL module is unloaded a list of all leaked
548dnl # addresses and where they were allocated will be dumped to the console.
549dnl # Enabling this feature has a significant impact on performance but it
550dnl # makes finding memory leaks pretty straight forward.
551dnl #
552AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
553 AC_ARG_ENABLE([debug-kmem-tracking],
554 [AS_HELP_STRING([--enable-debug-kmem-tracking],
555 [Enable detailed kmem tracking @<:@default=no@:>@])],
556 [],
557 [enable_debug_kmem_tracking=no])
558
559 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
3c208a54
BB		 560 [
561 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
562 DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
563 AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
055ffd98 564 [Define to 1 to enable detailed kmem tracking])
3c208a54
BB		 565 ], [
566 DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
567 ])
055ffd98 568
3c208a54 569 AC_SUBST(DEBUG_KMEM_TRACKING)
055ffd98
BB		 570 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
571 AC_MSG_RESULT([$enable_debug_kmem_tracking])
57d86234 572])
573
574dnl #
575dnl # SPL_LINUX_CONFTEST
576dnl #
577AC_DEFUN([SPL_LINUX_CONFTEST], [
dbe561d8 578cat confdefs.h - <<_ACEOF >conftest.c
57d86234 579$1
580_ACEOF
581])
582
583dnl #
584dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
585dnl #
586m4_define([SPL_LANG_PROGRAM], [
587$1
588int
589main (void)
590{
591dnl Do *not* indent the following line: there may be CPP directives.
592dnl Don't move the `;' right after for the same reason.
593$2
594 ;
595 return 0;
596}
597])
598
599dnl #
600dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
601dnl #
602AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
c5f70460 603 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
df7cc5bc 604 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
c5f70460 605 echo "obj-m := conftest.o" >build/Makefile
df7cc5bc
ED		 606 modpost_flag=''
607 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
c5f70460 608 AS_IF(
df7cc5bc
ED		 609 [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])],
610 [$4],
611 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
c5f70460
BB		 612 )
613 rm -Rf build
57d86234 614])
615
616dnl #
617dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
618dnl #
619AC_DEFUN([SPL_LINUX_TRY_COMPILE],
620 [SPL_LINUX_COMPILE_IFELSE(
d50bd9e2 621 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
622 [modules],
623 [test -s build/conftest.o],
624 [$3], [$4])
57d86234 625])
626
57d86234 627dnl #
628dnl # SPL_CHECK_SYMBOL_EXPORT
629dnl # check symbol exported or not
630dnl #
723aa3b0 631AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
2e0e7e69
BB		 632 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
633 $LINUX_OBJ/Module*.symvers 2>/dev/null
57d86234 634 rc=$?
635 if test $rc -ne 0; then
636 export=0
637 for file in $2; do
2e0e7e69
BB		 638 grep -q -E "EXPORT_SYMBOL.*($1)" \
639 "$LINUX_OBJ/$file" 2>/dev/null
57d86234 640 rc=$?
723aa3b0
ED		 641 if test $rc -eq 0; then
642 export=1
643 break;
644 fi
57d86234 645 done
723aa3b0 646 if test $export -eq 0; then :
57d86234 647 $4
723aa3b0 648 else :
57d86234 649 $3
650 fi
723aa3b0 651 else :
57d86234 652 $3
653 fi
654])
655
723aa3b0
ED		 656dnl #
657dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
658dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
659dnl # is called if not compiling for builtin
660dnl #
661AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
662 SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
663 if test $rc -ne 0; then :
664 $6
665 else
666 if test "x$enable_linux_builtin" != xyes; then
667 SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
668 fi
669 if test $rc -ne 0; then :
670 $6
671 else :
672 $5
673 fi
674 fi
675])
676
12ff95ff
BB		 677dnl #
678dnl # SPL_CHECK_SYMBOL_HEADER
679dnl # check if a symbol prototype is defined in listed headers.
680dnl #
681AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
682 AC_MSG_CHECKING([whether symbol $1 exists in header])
683 header=0
684 for file in $3; do
685 grep -q "$2" "$LINUX/$file" 2>/dev/null
686 rc=$?
723aa3b0
ED		 687 if test $rc -eq 0; then
688 header=1
689 break;
690 fi
12ff95ff
BB		 691 done
692 if test $header -eq 0; then
693 AC_MSG_RESULT([no])
694 $5
695 else
696 AC_MSG_RESULT([yes])
697 $4
698 fi
699])
700
86de8532 701dnl #
702dnl # SPL_CHECK_HEADER
703dnl # check whether header exists and define HAVE_$2_HEADER
704dnl #
705AC_DEFUN([SPL_CHECK_HEADER],
706 [AC_MSG_CHECKING([whether header $1 exists])
707 SPL_LINUX_TRY_COMPILE([
d50bd9e2 708 #include <$1>
86de8532 709 ],[
710 return 0;
711 ],[
712 AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
713 AC_MSG_RESULT(yes)
714 $3
715 ],[
716 AC_MSG_RESULT(no)
717 $4
718 ])
719])
6a6cafbe 720
0408008b 721dnl #
62032954
BB		 722dnl # Basic toolchain sanity check. Verify that kernel modules can
723dnl # be built and which symbols can be used.
0408008b
ED		 724dnl #
725AC_DEFUN([SPL_AC_TEST_MODULE],
726 [AC_MSG_CHECKING([whether modules can be built])
727 SPL_LINUX_TRY_COMPILE([],[],[
728 AC_MSG_RESULT([yes])
729 ],[
730 AC_MSG_RESULT([no])
731 if test "x$enable_linux_builtin" != xyes; then
732 AC_MSG_ERROR([*** Unable to build an empty module.])
733 else
734 AC_MSG_ERROR([
735 *** Unable to build an empty module.
736 *** Please run 'make scripts' inside the kernel source tree.])
737 fi
738 ])
62032954
BB		 739
740 AC_RUN_IFELSE([
741 AC_LANG_PROGRAM([
742 #include "$LINUX/include/linux/license.h"
743 ], [
744 return !license_is_gpl_compatible("$SPL_META_LICENSE");
745 ])
746 ], [
747 AC_DEFINE([SPL_IS_GPL_COMPATIBLE], [1],
748 [Define to 1 if GPL-only symbols can be used])
749 ], [
750 ])
0408008b
ED		 751])
752
57d86234 753dnl #
d04c8a56
BB		 754dnl # Use the atomic implemenation based on global spinlocks. This
755dnl # should only be needed by 32-bit kernels which do not provide
756dnl # the atomic64_* API. It may be optionally enabled as a fallback
757dnl # if problems are observed with the direct mapping to the native
758dnl # Linux atomic operations. You may not disable atomic spinlocks
759dnl # if you kernel does not an atomic64_* API.
57d86234 760dnl #
d04c8a56
BB		 761AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
762 AC_ARG_ENABLE([atomic-spinlocks],
763 [AS_HELP_STRING([--enable-atomic-spinlocks],
764 [Atomic types use spinlocks @<:@default=check@:>@])],
765 [],
766 [enable_atomic_spinlocks=check])
57d86234 767
a0f6da3d 768 SPL_LINUX_TRY_COMPILE([
dd3678fc 769 #include <linux/fs.h>
a0f6da3d 770 ],[
03318641 771 atomic64_t *ptr __attribute__ ((unused));
a0f6da3d 772 ],[
d04c8a56 773 have_atomic64_t=yes
a0f6da3d 774 AC_DEFINE(HAVE_ATOMIC64_T, 1,
d04c8a56 775 [kernel defines atomic64_t])
a0f6da3d 776 ],[
d04c8a56
BB		 777 have_atomic64_t=no
778 ])
779
780 AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
781 AS_IF([test "x$have_atomic64_t" = xyes], [
782 enable_atomic_spinlocks=no
783 ],[
784 enable_atomic_spinlocks=yes
785 ])
a0f6da3d 786 ])
d04c8a56
BB		 787
788 AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
789 AC_DEFINE([ATOMIC_SPINLOCK], [1],
790 [Atomic types use spinlocks])
791 ],[
792 AS_IF([test "x$have_atomic64_t" = xno], [
793 AC_MSG_FAILURE(
794 [--disable-atomic-spinlocks given but required atomic64 support is unavailable])
795 ])
796 ])
797
798 AC_MSG_CHECKING([whether atomic types use spinlocks])
799 AC_MSG_RESULT([$enable_atomic_spinlocks])
800
801 AC_MSG_CHECKING([whether kernel defines atomic64_t])
802 AC_MSG_RESULT([$have_atomic64_t])
a0f6da3d 803])
804
c3d9c0df 805AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[
23aa63cb
BB		 806 tmp_flags="$EXTRA_KCFLAGS"
807 EXTRA_KCFLAGS="-Werror"
c3d9c0df
RY		 808 dnl #
809 dnl # 2.6.23 to 2.6.34 API change
810 dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask)
811 dnl #
812 AC_MSG_CHECKING([whether old 2-argument shrinker exists])
23aa63cb
BB		 813 SPL_LINUX_TRY_COMPILE([
814 #include <linux/mm.h>
815
c3d9c0df 816 int shrinker_cb(int nr_to_scan, gfp_t gfp_mask);
23aa63cb
BB		 817 ],[
818 struct shrinker cache_shrinker = {
819 .shrink = shrinker_cb,
820 .seeks = DEFAULT_SEEKS,
821 };
822 register_shrinker(&cache_shrinker);
823 ],[
824 AC_MSG_RESULT(yes)
c3d9c0df
RY		 825 AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1,
826 [old shrinker callback wants 2 args])
23aa63cb
BB		 827 ],[
828 AC_MSG_RESULT(no)
c3d9c0df
RY		 829 dnl #
830 dnl # 2.6.35 - 2.6.39 API change
831 dnl # ->shrink(struct shrinker *,
832 dnl # int nr_to_scan, gfp_t gfp_mask)
833 dnl #
834 AC_MSG_CHECKING([whether old 3-argument shrinker exists])
835 SPL_LINUX_TRY_COMPILE([
836 #include <linux/mm.h>
837
838 int shrinker_cb(struct shrinker *, int nr_to_scan,
839 gfp_t gfp_mask);
840 ],[
841 struct shrinker cache_shrinker = {
842 .shrink = shrinker_cb,
843 .seeks = DEFAULT_SEEKS,
844 };
845 register_shrinker(&cache_shrinker);
846 ],[
847 AC_MSG_RESULT(yes)
848 AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
849 [old shrinker callback wants 3 args])
850 ],[
851 AC_MSG_RESULT(no)
852 dnl #
853 dnl # 3.0 - 3.11 API change
854 dnl # ->shrink(struct shrinker *,
855 dnl # struct shrink_control *sc)
856 dnl #
857 AC_MSG_CHECKING(
858 [whether new 2-argument shrinker exists])
859 SPL_LINUX_TRY_COMPILE([
860 #include <linux/mm.h>
861
862 int shrinker_cb(struct shrinker *,
863 struct shrink_control *sc);
864 ],[
865 struct shrinker cache_shrinker = {
866 .shrink = shrinker_cb,
867 .seeks = DEFAULT_SEEKS,
868 };
869 register_shrinker(&cache_shrinker);
870 ],[
871 AC_MSG_RESULT(yes)
872 AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1,
873 [new shrinker callback wants 2 args])
874 ],[
875 AC_MSG_RESULT(no)
876 dnl #
877 dnl # 3.12 API change,
878 dnl # ->shrink() is logically split in to
879 dnl # ->count_objects() and ->scan_objects()
880 dnl #
881 AC_MSG_CHECKING(
882 [whether ->count_objects callback exists])
883 SPL_LINUX_TRY_COMPILE([
884 #include <linux/mm.h>
885
886 unsigned long shrinker_cb(
887 struct shrinker *,
888 struct shrink_control *sc);
889 ],[
890 struct shrinker cache_shrinker = {
891 .count_objects = shrinker_cb,
892 .scan_objects = shrinker_cb,
893 .seeks = DEFAULT_SEEKS,
894 };
895 register_shrinker(&cache_shrinker);
896 ],[
897 AC_MSG_RESULT(yes)
898 AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
899 1, [->count_objects exists])
900 ],[
901 AC_MSG_ERROR(error)
902 ])
903 ])
904 ])
23aa63cb
BB		 905 ])
906 EXTRA_KCFLAGS="$tmp_flags"
907])
908
79a3bf13
BB		 909dnl #
910dnl # 2.6.33 API change,
911dnl # Removed .ctl_name from struct ctl_table.
912dnl #
913AC_DEFUN([SPL_AC_CTL_NAME], [
914 AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
915 SPL_LINUX_TRY_COMPILE([
916 #include <linux/sysctl.h>
917 ],[
03318641 918 struct ctl_table ctl __attribute__ ((unused));
79a3bf13
BB		 919 ctl.ctl_name = 0;
920 ],[
921 AC_MSG_RESULT(yes)
922 AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
923 ],[
924 AC_MSG_RESULT(no)
925 ])
926])
927
4d54fdee
BB		 928dnl #
929dnl # 2.6.29 API change,
a80d69ca
BB		 930dnl # Adaptive mutexs were introduced which track the mutex owner. The
931dnl # mutex wrappers leverage this functionality to avoid tracking the
932dnl # owner multipe times.
4d54fdee
BB		 933dnl #
934AC_DEFUN([SPL_AC_MUTEX_OWNER], [
935 AC_MSG_CHECKING([whether struct mutex has owner])
936 SPL_LINUX_TRY_COMPILE([
937 #include <linux/mutex.h>
938 ],[
03318641 939 struct mutex mtx __attribute__ ((unused));
4d54fdee
BB		 940 mtx.owner = NULL;
941 ],[
942 AC_MSG_RESULT(yes)
943 AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
944 ],[
945 AC_MSG_RESULT(no)
946 ])
947])
948
86fd39f3
BB		 949dnl #
950dnl # 2.6.39 API change,
951dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
952dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
953dnl # was defined. As of 2.6.39 this was changed to a task_struct
954dnl # pointer which frankly makes a lot more sense.
955dnl #
956AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
957 AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
958 tmp_flags="$EXTRA_KCFLAGS"
959 EXTRA_KCFLAGS="-Werror"
960 SPL_LINUX_TRY_COMPILE([
961 #include <linux/mutex.h>
a0625691 962 #include <linux/sched.h>
86fd39f3
BB		 963 ],[
964 struct mutex mtx __attribute__ ((unused));
965 mtx.owner = current;
966 ],[
967 AC_MSG_RESULT(yes)
968 AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
969 [struct mutex owner is a task_struct])
970 ],[
971 AC_MSG_RESULT(no)
972 ])
973 EXTRA_KCFLAGS="$tmp_flags"
974])
975
6c9433c1
BB		 976dnl #
977dnl # 2.6.18 API change,
978dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
979dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
980dnl # if the mutex validator is disabled or otherwise unavailable.
981dnl #
982AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
983 AC_MSG_CHECKING([whether mutex_lock_nested() is available])
984 SPL_LINUX_TRY_COMPILE([
985 #include <linux/mutex.h>
986 ],[
987 struct mutex mutex;
988 mutex_init(&mutex);
989 mutex_lock_nested(&mutex, 0);
990 ],[
991 AC_MSG_RESULT(yes)
992 AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
993 [mutex_lock_nested() is available])
994 ],[
995 AC_MSG_RESULT(no)
996 ])
997])
998
31a033ec
BB		 999dnl #
1000dnl # 2.6.27 API change,
1001dnl # on_each_cpu() uses 3 args, no 'retry' argument
1002dnl #
1003AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
1004 AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
1005 SPL_LINUX_TRY_COMPILE([
050cd84e 1006 #include <linux/interrupt.h>
31a033ec 1007 #include <linux/smp.h>
050cd84e
BB		 1008
1009 void on_each_cpu_func(void *data) { return; }
31a033ec 1010 ],[
050cd84e 1011 on_each_cpu(on_each_cpu_func, NULL, 0);
31a033ec
BB		 1012 ],[
1013 AC_MSG_RESULT(yes)
1014 AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
1015 [on_each_cpu wants 3 args])
1016 ],[
1017 AC_MSG_RESULT(no)
1018 ])
1019])
36b313da
BB		 1020
1021dnl #
d1ff2312
BB		 1022dnl # 2.6.18 API change,
1023dnl # kallsyms_lookup_name no longer exported
1024dnl #
723aa3b0
ED		 1025AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME],
1026 [AC_MSG_CHECKING([whether kallsyms_lookup_name() is available])
1027 SPL_LINUX_TRY_COMPILE_SYMBOL([
1028 #include <linux/kallsyms.h>
1029 ], [
1030 kallsyms_lookup_name(NULL);
1031 ], [kallsyms_lookup_name], [], [
1032 AC_MSG_RESULT(yes)
1033 AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1034 [kallsyms_lookup_name() is available])
1035 ], [
1036 AC_MSG_RESULT(no)
1037 ])
d1ff2312
BB		 1038])
1039
1040dnl #
e11d6c5f
BB		 1041dnl # Proposed API change,
1042dnl # This symbol is not available in stock kernels. You may build a
1043dnl # custom kernel with the *-spl-export-symbols.patch which will export
1044dnl # these symbols for use. If your already rolling a custom kernel for
1045dnl # your environment this is recommended.
d1ff2312 1046dnl #
723aa3b0
ED		 1047AC_DEFUN([SPL_AC_GET_VMALLOC_INFO],
1048 [AC_MSG_CHECKING([whether get_vmalloc_info() is available])
1049 SPL_CHECK_SYMBOL_EXPORT([get_vmalloc_info], [], [
1050 AC_MSG_RESULT(yes)
1051 AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
1052 [get_vmalloc_info() is available])
1053 ], [
1054 AC_MSG_RESULT(no)
1055 ])
d1ff2312
BB		 1056])
1057
c02ab72f
YS		 1058dnl #
1059dnl # 3.10 API change,
1060dnl # struct vmalloc_info is now declared in linux/vmalloc.h
1061dnl #
1062AC_DEFUN([SPL_AC_VMALLOC_INFO], [
1063 AC_MSG_CHECKING([whether struct vmalloc_info is declared])
1064 SPL_LINUX_TRY_COMPILE([
1065 #include <linux/vmalloc.h>
1066 struct vmalloc_info { void *a; };
1067 ],[
1068 return 0;
1069 ],[
1070 AC_MSG_RESULT(no)
1071 ],[
1072 AC_MSG_RESULT(yes)
1073 AC_DEFINE(HAVE_VMALLOC_INFO, 1, [yes])
1074 ])
1075])
1076
1ddf9722
YS		 1077dnl #
1078dnl # 3.10 API change,
1079dnl # PDE is replaced by PDE_DATA
1080dnl #
1081AC_DEFUN([SPL_AC_PDE_DATA], [
1082 AC_MSG_CHECKING([whether PDE_DATA() is available])
1083 SPL_LINUX_TRY_COMPILE_SYMBOL([
1084 #include <linux/proc_fs.h>
1085 ], [
1086 PDE_DATA(NULL);
1087 ], [PDE_DATA], [], [
1088 AC_MSG_RESULT(yes)
1089 AC_DEFINE(HAVE_PDE_DATA, 1, [yes])
1090 ],[
1091 AC_MSG_RESULT(no)
1092 ])
1093])
1094
5232d256
BB		 1095dnl #
1096dnl # 2.6.17 API change
1097dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
1098dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
1099dnl # were exported in 2.6.17 for use by modules which was consistent with
1100dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
1101dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
1102dnl # were dropped entirely leaving modules no way to directly iterate over
1103dnl # the zone list. Because we need access to the zone helpers we check
1104dnl # if the kernel contains the old or new implementation. Then we check
1105dnl # to see if the symbols we need for each version are available. If they
1106dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
1107dnl #
1108AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
1109 AC_MSG_CHECKING([whether symbol *_pgdat exist])
1110 grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
1111 rc=$?
1112 if test $rc -eq 0; then
1113 AC_MSG_RESULT([yes])
723aa3b0 1114 AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
5232d256
BB		 1115 else
1116 AC_MSG_RESULT([no])
1117 fi
1118])
1119
d1ff2312 1120dnl #
e11d6c5f
BB		 1121dnl # Proposed API change,
1122dnl # This symbol is not available in stock kernels. You may build a
1123dnl # custom kernel with the *-spl-export-symbols.patch which will export
1124dnl # these symbols for use. If your already rolling a custom kernel for
1125dnl # your environment this is recommended.
36b313da 1126dnl #
723aa3b0
ED		 1127AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT],
1128 [AC_MSG_CHECKING([whether first_online_pgdat() is available])
1129 SPL_LINUX_TRY_COMPILE_SYMBOL([
1130 #include <linux/mmzone.h>
1131 ], [
1132 first_online_pgdat();
1133 ], [first_online_pgdat], [], [
1134 AC_MSG_RESULT(yes)
1135 AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
1136 [first_online_pgdat() is available])
1137 ], [
1138 AC_MSG_RESULT(no)
1139 ])
36b313da
BB		 1140])
1141
1142dnl #
e11d6c5f
BB		 1143dnl # Proposed API change,
1144dnl # This symbol is not available in stock kernels. You may build a
1145dnl # custom kernel with the *-spl-export-symbols.patch which will export
1146dnl # these symbols for use. If your already rolling a custom kernel for
1147dnl # your environment this is recommended.
36b313da 1148dnl #
723aa3b0
ED		 1149AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT],
1150 [AC_MSG_CHECKING([whether next_online_pgdat() is available])
1151 SPL_LINUX_TRY_COMPILE_SYMBOL([
1152 #include <linux/mmzone.h>
1153 ], [
1154 next_online_pgdat(NULL);
1155 ], [next_online_pgdat], [], [
1156 AC_MSG_RESULT(yes)
1157 AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
1158 [next_online_pgdat() is available])
1159 ], [
1160 AC_MSG_RESULT(no)
1161 ])
36b313da
BB		 1162])
1163
1164dnl #
e11d6c5f
BB		 1165dnl # Proposed API change,
1166dnl # This symbol is not available in stock kernels. You may build a
1167dnl # custom kernel with the *-spl-export-symbols.patch which will export
1168dnl # these symbols for use. If your already rolling a custom kernel for
1169dnl # your environment this is recommended.
36b313da 1170dnl #
723aa3b0
ED		 1171AC_DEFUN([SPL_AC_NEXT_ZONE],
1172 [AC_MSG_CHECKING([whether next_zone() is available])
1173 SPL_LINUX_TRY_COMPILE_SYMBOL([
1174 #include <linux/mmzone.h>
1175 ], [
1176 next_zone(NULL);
1177 ], [next_zone], [], [
1178 AC_MSG_RESULT(yes)
1179 AC_DEFINE(HAVE_NEXT_ZONE, 1, [next_zone() is available])
1180 ], [
1181 AC_MSG_RESULT(no)
1182 ])
36b313da 1183])
4ab13d3b 1184
5232d256
BB		 1185dnl #
1186dnl # 2.6.17 API change,
1187dnl # See SPL_AC_PGDAT_HELPERS for details.
1188dnl #
723aa3b0
ED		 1189AC_DEFUN([SPL_AC_PGDAT_LIST],
1190 [AC_MSG_CHECKING([whether pgdat_list is available])
1191 SPL_LINUX_TRY_COMPILE_SYMBOL([
1192 #include <linux/topology.h>
1193 pg_data_t *tmp = pgdat_list;
1194 ], [], [pgdat_list], [], [
1195 AC_MSG_RESULT(yes)
1196 AC_DEFINE(HAVE_PGDAT_LIST, 1, [pgdat_list is available])
1197 ], [
1198 AC_MSG_RESULT(no)
1199 ])
5232d256
BB		 1200])
1201
96dded38
BB		 1202dnl #
1203dnl # 2.6.18 API change,
1204dnl # First introduced global_page_state() support as an inline.
1205dnl #
1206AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
1207 AC_MSG_CHECKING([whether global_page_state() is available])
1208 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1209 #include <linux/mm.h>
96dded38 1210 ],[
03318641 1211 unsigned long state __attribute__ ((unused));
6ae7fef5 1212 state = global_page_state(0);
96dded38
BB		 1213 ],[
1214 AC_MSG_RESULT(yes)
1215 AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
1216 [global_page_state() is available])
1217 ],[
1218 AC_MSG_RESULT(no)
1219 ])
1220])
1221
e11d6c5f 1222dnl #
6ae7fef5
BB		 1223dnl # 2.6.21 API change (plus subsequent naming convention changes),
1224dnl # Public global zone stats now include a free page count. However
1225dnl # the enumerated names of the counters have changed since this API
1226dnl # was introduced. We need to deduce the corrent name to use. This
1227dnl # replaces the priviate get_zone_counts() interface.
1228dnl #
1229dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
1230dnl # is 2.6.30 as of when this was written.
e11d6c5f 1231dnl #
6ae7fef5
BB		 1232AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
1233 AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
e11d6c5f 1234 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1235 #include <linux/mm.h>
e11d6c5f 1236 ],[
03318641 1237 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5 1238 zsi = NR_FREE_PAGES;
e11d6c5f
BB		 1239 ],[
1240 AC_MSG_RESULT(yes)
6ae7fef5
BB		 1241 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
1242 [Page state NR_FREE_PAGES is available])
e11d6c5f
BB		 1243 ],[
1244 AC_MSG_RESULT(no)
1245 ])
1246])
a093c6a4 1247
6ae7fef5
BB		 1248dnl #
1249dnl # 2.6.21 API change (plus subsequent naming convention changes),
1250dnl # Public global zone stats now include an inactive page count. However
1251dnl # the enumerated names of the counters have changed since this API
1252dnl # was introduced. We need to deduce the corrent name to use. This
1253dnl # replaces the priviate get_zone_counts() interface.
1254dnl #
1255dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
1256dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
1257dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
1258dnl #
1259AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
1260 AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
1261 SPL_LINUX_TRY_COMPILE([
1262 #include <linux/mm.h>
1263 ],[
03318641 1264 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1265 zsi = NR_INACTIVE;
1266 ],[
1267 AC_MSG_RESULT(yes)
1268 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
1269 [Page state NR_INACTIVE is available])
1270 ],[
1271 AC_MSG_RESULT(no)
1272 ])
1273
1274 AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
1275 SPL_LINUX_TRY_COMPILE([
1276 #include <linux/mm.h>
1277 ],[
03318641 1278 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1279 zsi = NR_INACTIVE_ANON;
1280 ],[
1281 AC_MSG_RESULT(yes)
1282 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
1283 [Page state NR_INACTIVE_ANON is available])
1284 ],[
1285 AC_MSG_RESULT(no)
1286 ])
1287
1288 AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
1289 SPL_LINUX_TRY_COMPILE([
1290 #include <linux/mm.h>
1291 ],[
03318641 1292 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1293 zsi = NR_INACTIVE_FILE;
1294 ],[
1295 AC_MSG_RESULT(yes)
1296 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
1297 [Page state NR_INACTIVE_FILE is available])
1298 ],[
1299 AC_MSG_RESULT(no)
1300 ])
1301])
1302
1303dnl #
1304dnl # 2.6.21 API change (plus subsequent naming convention changes),
1305dnl # Public global zone stats now include an active page count. However
1306dnl # the enumerated names of the counters have changed since this API
1307dnl # was introduced. We need to deduce the corrent name to use. This
1308dnl # replaces the priviate get_zone_counts() interface.
1309dnl #
1310dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
1311dnl # anonymous and file active pages. As of 2.6.28 it was split in
1312dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
1313dnl #
1314AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
1315 AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
1316 SPL_LINUX_TRY_COMPILE([
1317 #include <linux/mm.h>
1318 ],[
03318641 1319 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1320 zsi = NR_ACTIVE;
1321 ],[
1322 AC_MSG_RESULT(yes)
1323 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
1324 [Page state NR_ACTIVE is available])
1325 ],[
1326 AC_MSG_RESULT(no)
1327 ])
1328
1329 AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
1330 SPL_LINUX_TRY_COMPILE([
1331 #include <linux/mm.h>
1332 ],[
03318641 1333 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1334 zsi = NR_ACTIVE_ANON;
1335 ],[
1336 AC_MSG_RESULT(yes)
1337 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
1338 [Page state NR_ACTIVE_ANON is available])
1339 ],[
1340 AC_MSG_RESULT(no)
1341 ])
1342
1343 AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
1344 SPL_LINUX_TRY_COMPILE([
1345 #include <linux/mm.h>
1346 ],[
03318641 1347 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1348 zsi = NR_ACTIVE_FILE;
1349 ],[
1350 AC_MSG_RESULT(yes)
1351 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
1352 [Page state NR_ACTIVE_FILE is available])
1353 ],[
1354 AC_MSG_RESULT(no)
1355 ])
1356])
1357
1358dnl #
1359dnl # Proposed API change for legacy kernels.
1360dnl # This symbol is not available in older kernels. For kernels post
1361dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
1362dnl # page state information. This symbol is only used in legacy kernels
1363dnl # any only as a last resort.
1364dnl
1365AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
1366 AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
1367 SPL_LINUX_TRY_COMPILE([
1368 ],[
1369 #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
1370 #error "global_page_state needs NR_FREE_PAGES"
1371 #endif
1372
1373 #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
1374 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
1375 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
1376 #error "global_page_state needs NR_ACTIVE*"
1377 #endif
1378
1379 #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
1380 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
1381 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
1382 #error "global_page_state needs NR_INACTIVE*"
1383 #endif
1384 ],[
1385 AC_MSG_RESULT(no)
1386 ],[
1387 AC_MSG_RESULT(yes)
1388 AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
1389 [get_zone_counts() is needed])
1390
723aa3b0
ED		 1391 AC_MSG_CHECKING([whether get_zone_counts() is available])
1392 SPL_LINUX_TRY_COMPILE_SYMBOL([
1393 #include <linux/mmzone.h>
1394 ], [
1395 get_zone_counts(NULL, NULL, NULL);
1396 ], [get_zone_counts], [], [
1397 AC_MSG_RESULT(yes)
1398 AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
1399 [get_zone_counts() is available])
1400 ], [
1401 AC_MSG_RESULT(no)
1402 ])
6ae7fef5
BB		 1403 ])
1404])
1405
7119bf70
BB		 1406dnl #
1407dnl # 2.6.27 API change,
1408dnl # The user_path_dir() replaces __user_walk()
1409dnl #
723aa3b0
ED		 1410AC_DEFUN([SPL_AC_USER_PATH_DIR],
1411 [AC_MSG_CHECKING([whether user_path_dir() is available])
1412 SPL_LINUX_TRY_COMPILE_SYMBOL([
1413 #include <linux/fcntl.h>
1414 #include <linux/namei.h>
1415 ], [
1416 user_path_dir(NULL, NULL);
1417 ], [user_path_at], [], [
1418 AC_MSG_RESULT(yes)
1419 AC_DEFINE(HAVE_USER_PATH_DIR, 1, [user_path_dir() is available])
1420 ], [
1421 AC_MSG_RESULT(no)
1422 ])
7119bf70
BB		 1423])
1424
51a727e9
BB		 1425dnl #
1426dnl # Symbol available in RHEL kernels not in stock kernels.
1427dnl #
723aa3b0
ED		 1428AC_DEFUN([SPL_AC_SET_FS_PWD],
1429 [AC_MSG_CHECKING([whether set_fs_pwd() is available])
1430 SPL_LINUX_TRY_COMPILE_SYMBOL([
1431 #include <linux/spinlock.h>
1432 #include <linux/fs_struct.h>
1433 ], [
1434 (void) set_fs_pwd;
1435 ], [set_fs_pwd], [], [
1436 AC_MSG_RESULT(yes)
1437 AC_DEFINE(HAVE_SET_FS_PWD, 1, [set_fs_pwd() is available])
1438 ], [
1439 AC_MSG_RESULT(no)
1440 ])
51a727e9
BB		 1441])
1442
a54718cf
RY		 1443dnl #
1444dnl # 3.9 API change
1445dnl # set_fs_pwd takes const struct path *
1446dnl #
1447AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
a54718cf
RY		 1448 tmp_flags="$EXTRA_KCFLAGS"
1449 EXTRA_KCFLAGS="-Werror"
1450 [AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
1451 SPL_LINUX_TRY_COMPILE([
1452 #include <linux/spinlock.h>
1453 #include <linux/fs_struct.h>
1454 #include <linux/path.h>
1455 void (*const set_fs_pwd_func)
1456 (struct fs_struct *, const struct path *)
1457 = set_fs_pwd;
1458 ],[
1459 return 0;
1460 ],[
1461 AC_MSG_RESULT(yes)
1462 AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
1463 [set_fs_pwd() needs const path *])
1464 ],[
1465 SPL_LINUX_TRY_COMPILE([
1466 #include <linux/spinlock.h>
1467 #include <linux/fs_struct.h>
1468 #include <linux/path.h>
1469 void (*const set_fs_pwd_func)
1470 (struct fs_struct *, struct path *)
1471 = set_fs_pwd;
1472 ],[
1473 return 0;
1474 ],[
1475 AC_MSG_RESULT(no)
1476 ],[
1477 AC_MSG_ERROR(unknown)
1478 ])
1479 ])
1480 EXTRA_KCFLAGS="$tmp_flags"
a54718cf
RY		 1481])
1482
a093c6a4
BB		 1483AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
1484 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
1485 SPL_LINUX_TRY_COMPILE([
1486 #include <linux/fs.h>
1487 ],[
50a0749e 1488 vfs_unlink((struct inode *) NULL, (struct dentry *) NULL);
a093c6a4
BB		 1489 ],[
1490 AC_MSG_RESULT(yes)
1491 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
1492 [vfs_unlink() wants 2 args])
1493 ],[
1494 AC_MSG_RESULT(no)
50a0749e
RY		 1495 dnl #
1496 dnl # Linux 3.13 API change
1497 dnl # Added delegated inode
1498 dnl #
1499 AC_MSG_CHECKING([whether vfs_unlink() wants 3 args])
1500 SPL_LINUX_TRY_COMPILE([
1501 #include <linux/fs.h>
1502 ],[
1503 vfs_unlink((struct inode *) NULL,
1504 (struct dentry *) NULL,
1505 (struct inode **) NULL);
1506 ],[
1507 AC_MSG_RESULT(yes)
1508 AC_DEFINE(HAVE_3ARGS_VFS_UNLINK, 1,
1509 [vfs_unlink() wants 3 args])
1510 ],[
1511 AC_MSG_ERROR(no)
1512 ])
1513
a093c6a4
BB		 1514 ])
1515])
1516
a093c6a4
BB		 1517AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
1518 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
1519 SPL_LINUX_TRY_COMPILE([
1520 #include <linux/fs.h>
1521 ],[
50a0749e
RY		 1522 vfs_rename((struct inode *) NULL, (struct dentry *) NULL,
1523 (struct inode *) NULL, (struct dentry *) NULL);
a093c6a4
BB		 1524 ],[
1525 AC_MSG_RESULT(yes)
1526 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
1527 [vfs_rename() wants 4 args])
1528 ],[
1529 AC_MSG_RESULT(no)
50a0749e
RY		 1530 dnl #
1531 dnl # Linux 3.13 API change
1532 dnl # Added delegated inode
1533 dnl #
1534 AC_MSG_CHECKING([whether vfs_rename() wants 5 args])
1535 SPL_LINUX_TRY_COMPILE([
1536 #include <linux/fs.h>
1537 ],[
1538 vfs_rename((struct inode *) NULL,
1539 (struct dentry *) NULL,
1540 (struct inode *) NULL,
1541 (struct dentry *) NULL,
1542 (struct inode **) NULL);
1543 ],[
1544 AC_MSG_RESULT(yes)
1545 AC_DEFINE(HAVE_5ARGS_VFS_RENAME, 1,
1546 [vfs_rename() wants 5 args])
1547 ],[
ad3412ef
CC		 1548 AC_MSG_RESULT(no)
1549 dnl #
1550 dnl # Linux 3.15 API change
1551 dnl # Added flags
1552 dnl #
1553 AC_MSG_CHECKING([whether vfs_rename() wants 6 args])
1554 SPL_LINUX_TRY_COMPILE([
1555 #include <linux/fs.h>
1556 ],[
1557 vfs_rename((struct inode *) NULL,
1558 (struct dentry *) NULL,
1559 (struct inode *) NULL,
1560 (struct dentry *) NULL,
1561 (struct inode **) NULL,
1562 (unsigned int) 0);
1563 ],[
1564 AC_MSG_RESULT(yes)
1565 AC_DEFINE(HAVE_6ARGS_VFS_RENAME, 1,
1566 [vfs_rename() wants 6 args])
1567 ],[
1568 AC_MSG_ERROR(no)
1569 ])
50a0749e 1570 ])
a093c6a4
BB		 1571 ])
1572])
ec7d53e9 1573
9b2048c2
BB		 1574dnl #
1575dnl # 2.6.36 API change,
1576dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
1577dnl # a spinlock_t to improve the fastpath performance.
1578dnl #
1579AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
1580 AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
97fd6a07
BB		 1581 tmp_flags="$EXTRA_KCFLAGS"
1582 EXTRA_KCFLAGS="-Werror"
9b2048c2
BB		 1583 SPL_LINUX_TRY_COMPILE([
1584 #include <linux/sched.h>
1585 #include <linux/fs_struct.h>
1586 ],[
1587 struct fs_struct fs;
1588 spin_lock_init(&fs.lock);
1589 ],[
1590 AC_MSG_RESULT(yes)
1591 AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
1592 [struct fs_struct uses spinlock_t])
1593 ],[
1594 AC_MSG_RESULT(no)
1595 ])
97fd6a07 1596 EXTRA_KCFLAGS="$tmp_flags"
9b2048c2
BB		 1597])
1598
ec7d53e9
BB		 1599dnl #
1600dnl # 2.6.29 API change,
1601dnl # check whether 'struct cred' exists
1602dnl #
1603AC_DEFUN([SPL_AC_CRED_STRUCT], [
1604 AC_MSG_CHECKING([whether struct cred exists])
1605 SPL_LINUX_TRY_COMPILE([
1606 #include <linux/cred.h>
1607 ],[
03318641 1608 struct cred *cr __attribute__ ((unused));
ec7d53e9
BB		 1609 cr = NULL;
1610 ],[
1611 AC_MSG_RESULT(yes)
1612 AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
1613 ],[
1614 AC_MSG_RESULT(no)
1615 ])
1616])
1617
f7fd6ddd
RY		 1618
1619dnl #
1620dnl # User namespaces, use kuid_t in place of uid_t
1621dnl # where available. Not strictly a user namespaces thing
1622dnl # but it should prevent surprises
1623dnl #
1624AC_DEFUN([SPL_AC_KUIDGID_T], [
1625 AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
1626 SPL_LINUX_TRY_COMPILE([
1627 #include <linux/uidgid.h>
1628 ], [
1629 kuid_t userid = KUIDT_INIT(0);
1630 kgid_t groupid = KGIDT_INIT(0);
1631 ],[
1632 SPL_LINUX_TRY_COMPILE([
1633 #include <linux/uidgid.h>
1634 ], [
1635 kuid_t userid = 0;
1636 kgid_t groupid = 0;
1637 ],[
1638 AC_MSG_RESULT(yes; optional)
1639 ],[
1640 AC_MSG_RESULT(yes; mandatory)
1641 AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])
1642 ])
1643 ],[
1644 AC_MSG_RESULT(no)
1645 ])
1646])
1647
ec7d53e9 1648dnl #
e811949a 1649dnl # Custom SPL patch may export this symbol.
ec7d53e9 1650dnl #
723aa3b0
ED		 1651AC_DEFUN([SPL_AC_GROUPS_SEARCH],
1652 [AC_MSG_CHECKING([whether groups_search() is available])
1653 SPL_LINUX_TRY_COMPILE_SYMBOL([
1654 #include <linux/cred.h>
f7fd6ddd
RY		 1655 #ifdef HAVE_KUIDGID_T
1656 #include <linux/uidgid.h>
1657 #endif
723aa3b0 1658 ], [
f7fd6ddd
RY		 1659 #ifdef HAVE_KUIDGID_T
1660 groups_search(NULL, KGIDT_INIT(0));
1661 #else
723aa3b0 1662 groups_search(NULL, 0);
f7fd6ddd 1663 #endif
723aa3b0
ED		 1664 ], [groups_search], [], [
1665 AC_MSG_RESULT(yes)
1666 AC_DEFINE(HAVE_GROUPS_SEARCH, 1, [groups_search() is available])
1667 ], [
1668 AC_MSG_RESULT(no)
1669 ])
ec7d53e9 1670])
e811949a
BB		 1671
1672dnl #
1673dnl # 2.6.x API change,
1674dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
1675dnl #
723aa3b0
ED		 1676AC_DEFUN([SPL_AC_PUT_TASK_STRUCT],
1677 [AC_MSG_CHECKING([whether __put_task_struct() is available])
1678 SPL_LINUX_TRY_COMPILE_SYMBOL([
1679 #include <linux/sched.h>
1680 ], [
1681 __put_task_struct(NULL);
1682 ], [__put_task_struct], [], [
1683 AC_MSG_RESULT(yes)
1684 AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
1685 [__put_task_struct() is available])
1686 ], [
1687 AC_MSG_RESULT(no)
1688 ])
e811949a 1689])
3977f837
BB		 1690
1691dnl #
1692dnl # 2.6.32 API change,
1693dnl # Unused 'struct file *' removed from prototype.
1694dnl #
1695AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
1696 AC_MSG_CHECKING([whether proc_handler() wants 5 args])
1697 SPL_LINUX_TRY_COMPILE([
1698 #include <linux/sysctl.h>
1699 ],[
1700 proc_dostring(NULL, 0, NULL, NULL, NULL);
1701 ],[
1702 AC_MSG_RESULT(yes)
1703 AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
1704 [proc_handler() wants 5 args])
1705 ],[
1706 AC_MSG_RESULT(no)
1707 ])
1708])
b868e22f
BB		 1709
1710dnl #
1711dnl # 2.6.x API change,
1712dnl # kvasprintf() function added.
1713dnl #
723aa3b0
ED		 1714AC_DEFUN([SPL_AC_KVASPRINTF],
1715 [AC_MSG_CHECKING([whether kvasprintf() is available])
1716 SPL_LINUX_TRY_COMPILE_SYMBOL([
1717 #include <linux/kernel.h>
1718 ], [
1719 kvasprintf(0, NULL, *((va_list*)NULL));
1720 ], [kvasprintf], [], [
1721 AC_MSG_RESULT(yes)
1722 AC_DEFINE(HAVE_KVASPRINTF, 1, [kvasprintf() is available])
1723 ], [
1724 AC_MSG_RESULT(no)
1725 ])
b868e22f 1726])
f0ff89fc 1727
0d0b5237
BB		 1728dnl #
1729dnl # 2.6.29 API change,
1730dnl # vfs_fsync() funcation added, prior to this use file_fsync().
1731dnl #
723aa3b0
ED		 1732AC_DEFUN([SPL_AC_VFS_FSYNC],
1733 [AC_MSG_CHECKING([whether vfs_fsync() is available])
1734 SPL_LINUX_TRY_COMPILE_SYMBOL([
1735 #include <linux/fs.h>
1736 ], [
1737 (void) vfs_fsync;
1738 ], [vfs_fsync], [fs/sync.c], [
1739 AC_MSG_RESULT(yes)
1740 AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])
1741 ], [
1742 AC_MSG_RESULT(no)
1743 ])
0d0b5237
BB		 1744])
1745
f0ff89fc
BB		 1746dnl #
1747dnl # 2.6.35 API change,
0d0b5237 1748dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
f0ff89fc 1749dnl #
0d0b5237
BB		 1750AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
1751 AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
f0ff89fc 1752 SPL_LINUX_TRY_COMPILE([
0d0b5237 1753 #include <linux/fs.h>
f0ff89fc 1754 ],[
0d0b5237 1755 vfs_fsync(NULL, 0);
f0ff89fc
BB		 1756 ],[
1757 AC_MSG_RESULT(yes)
0d0b5237 1758 AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
f0ff89fc
BB		 1759 ],[
1760 AC_MSG_RESULT(no)
1761 ])
1762])
46aa7b39 1763
bbdc6ae4
ED		 1764dnl #
1765dnl # 3.5 API change,
1766dnl # inode_operations.truncate_range removed
bbdc6ae4
ED		 1767dnl #
1768AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
1769 AC_MSG_CHECKING([whether truncate_range() inode operation is available])
1770 SPL_LINUX_TRY_COMPILE([
1771 #include <linux/fs.h>
1772 ],[
1773 struct inode_operations ops;
1774 ops.truncate_range = NULL;
1775 ],[
1776 AC_MSG_RESULT(yes)
1777 AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
1778 [truncate_range() inode operation is available])
1779 ],[
1780 AC_MSG_RESULT(no)
1781 ])
1c7b3eaf
BB		 1782])
1783
1784dnl #
1785dnl # Linux 2.6.38 - 3.x API
1786dnl #
1787AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
1788 AC_MSG_CHECKING([whether fops->fallocate() exists])
1789 SPL_LINUX_TRY_COMPILE([
1790 #include <linux/fs.h>
1791 ],[
1792 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
1793 struct file_operations fops __attribute__ ((unused)) = {
1794 .fallocate = fallocate,
1795 };
1796 ],[
1797 AC_MSG_RESULT(yes)
1798 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
1799 ],[
1800 AC_MSG_RESULT(no)
1801 ])
1802])
1803
1804dnl #
1805dnl # Linux 2.6.x - 2.6.37 API
1806dnl #
1807AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
1808 AC_MSG_CHECKING([whether iops->fallocate() exists])
1809 SPL_LINUX_TRY_COMPILE([
1810 #include <linux/fs.h>
1811 ],[
1812 long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
1813 struct inode_operations fops __attribute__ ((unused)) = {
1814 .fallocate = fallocate,
1815 };
1816 ],[
1817 AC_MSG_RESULT(yes)
1818 AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
1819 ],[
1820 AC_MSG_RESULT(no)
1821 ])
1822])
1823
1824dnl #
1825dnl # PaX Linux 2.6.38 - 3.x API
1826dnl #
1827AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
1828 AC_MSG_CHECKING([whether fops->fallocate() exists])
1829 SPL_LINUX_TRY_COMPILE([
1830 #include <linux/fs.h>
1831 ],[
1832 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
1833 struct file_operations_no_const fops __attribute__ ((unused)) = {
1834 .fallocate = fallocate,
1835 };
1836 ],[
1837 AC_MSG_RESULT(yes)
1838 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
1839 ],[
1840 AC_MSG_RESULT(no)
1841 ])
1842])
1843
1844dnl #
1845dnl # The fallocate callback was moved from the inode_operations
1846dnl # structure to the file_operations structure.
1847dnl #
1848AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
1849 SPL_AC_KERNEL_FILE_FALLOCATE
1850 SPL_AC_KERNEL_INODE_FALLOCATE
1851 SPL_AC_PAX_KERNEL_FILE_FALLOCATE
1852])
bbdc6ae4 1853
46aa7b39
NB		 1854dnl #
1855dnl # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
1856dnl # Earlier versions of rwsem_is_locked() were inline and had a race
1857dnl # condition. The fixed version is exported as a symbol. The race
1858dnl # condition is fixed by acquiring sem->wait_lock, so we must not
1859dnl # call that version while holding sem->wait_lock.
1860dnl #
723aa3b0
ED		 1861AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED],
1862 [AC_MSG_CHECKING([whether rwsem_is_locked() acquires sem->wait_lock])
1863 SPL_LINUX_TRY_COMPILE_SYMBOL([
1864 #include <linux/rwsem.h>
1865 int rwsem_is_locked(struct rw_semaphore *sem) { return 0; }
1866 ], [], [rwsem_is_locked], [lib/rwsem-spinlock.c], [
1867 AC_MSG_RESULT(yes)
1868 AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
1869 [rwsem_is_locked() acquires sem->wait_lock])
1870 ], [
1871 AC_MSG_RESULT(no)
1872 ])
46aa7b39 1873])
914b0631 1874
e76f4bf1
BB		 1875dnl #
1876dnl # 2.6.xx API compat,
1877dnl # There currently exists no exposed API to partially shrink the dcache.
1878dnl # The expected mechanism to shrink the cache is a registered shrinker
1879dnl # which is called during memory pressure.
1880dnl #
723aa3b0
ED		 1881AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY],
1882 [AC_MSG_CHECKING([whether shrink_dcache_memory() is available])
1883 SPL_LINUX_TRY_COMPILE_SYMBOL([
1884 #include <linux/dcache.h>
1885 ], [
1886 shrink_dcache_memory(0, 0);
1887 ], [shrink_dcache_memory], [fs/dcache.c], [
1888 AC_MSG_RESULT(yes)
1889 AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
1890 [shrink_dcache_memory() is available])
1891 ], [
1892 AC_MSG_RESULT(no)
1893 ])
e76f4bf1
BB		 1894])
1895
1896dnl #
1897dnl # 2.6.xx API compat,
1898dnl # There currently exists no exposed API to partially shrink the icache.
1899dnl # The expected mechanism to shrink the cache is a registered shrinker
1900dnl # which is called during memory pressure.
1901dnl #
723aa3b0
ED		 1902AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY],
1903 [AC_MSG_CHECKING([whether shrink_icache_memory() is available])
1904 SPL_LINUX_TRY_COMPILE_SYMBOL([
1905 #include <linux/dcache.h>
1906 ], [
1907 shrink_icache_memory(0, 0);
1908 ], [shrink_icache_memory], [fs/inode.c], [
1909 AC_MSG_RESULT(yes)
1910 AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
1911 [shrink_icache_memory() is available])
1912 ], [
1913 AC_MSG_RESULT(no)
1914 ])
e76f4bf1 1915])
b1cbc461
BB		 1916
1917dnl #
ec18fe3c
RY		 1918dnl # 2.6.28 API change
1919dnl # The kern_path() function has been introduced. We adopt it as the new way
1920dnl # of looking up paths. When it is not available, we emulate it using the
1921dnl # older interfaces.
b1cbc461 1922dnl #
ec18fe3c
RY		 1923AC_DEFUN([SPL_AC_KERN_PATH],
1924 [AC_MSG_CHECKING([whether kern_path() is available])
723aa3b0
ED		 1925 SPL_LINUX_TRY_COMPILE_SYMBOL([
1926 #include <linux/namei.h>
1927 ], [
ec18fe3c
RY		 1928 int r = kern_path(NULL, 0, NULL);
1929 ], [kern_path], [fs/namei.c], [
723aa3b0 1930 AC_MSG_RESULT(yes)
ec18fe3c
RY		 1931 AC_DEFINE(HAVE_KERN_PATH, 1,
1932 [kern_path() is available])
723aa3b0
ED		 1933 ], [
1934 AC_MSG_RESULT(no)
ec18fe3c
RY		 1935 AC_MSG_CHECKING([whether path_lookup() is available])
1936 SPL_LINUX_TRY_COMPILE_SYMBOL([
1937 #include <linux/namei.h>
1938 ], [
1939 int r = path_lookup(NULL, 0, NULL);
1940 ], [path_lookup], [fs/namei.c], [
1941 AC_MSG_RESULT(yes)
1942 AC_DEFINE(HAVE_KERN_PATH, 1,
1943 [kern_path() is available])
1944 ], [
1945 AC_MSG_RESULT(no)
1946 AC_MSG_ERROR([
1947 *** Neither kern_path() nor path_lookup() is available.
1948 *** Please file an issue:
1949 *** https://github.com/zfsonlinux/spl/issues/new])
3dfc591a 1950
ec18fe3c
RY		 1951 ])
1952 ])
bcb15891
YS		 1953])
1954
de081a2a
BB		 1955dnl #
1956dnl # /proc/kallsyms support,
1957dnl # Verify the kernel has CONFIG_KALLSYMS support enabled.
1958dnl #
1959AC_DEFUN([SPL_AC_CONFIG_KALLSYMS], [
1960 AC_MSG_CHECKING([whether CONFIG_KALLSYMS is defined])
1961 SPL_LINUX_TRY_COMPILE([
1962 #if !defined(CONFIG_KALLSYMS)
1963 #error CONFIG_KALLSYMS not defined
1964 #endif
1965 ],[ ],[
1966 AC_MSG_RESULT([yes])
1967 ],[
1968 AC_MSG_RESULT([no])
1969 AC_MSG_ERROR([
1970 *** This kernel does not include the required kallsyms support.
1971 *** Rebuild the kernel with CONFIG_KALLSYMS=y set.])
1972 ])
1973])
1974
42b3ce62
BB		 1975dnl #
1976dnl # zlib inflate compat,
1977dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
1978dnl #
1979AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
1980 AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
1981 SPL_LINUX_TRY_COMPILE([
1982 #if !defined(CONFIG_ZLIB_INFLATE) && \
1983 !defined(CONFIG_ZLIB_INFLATE_MODULE)
1984 #error CONFIG_ZLIB_INFLATE not defined
1985 #endif
1986 ],[ ],[
1987 AC_MSG_RESULT([yes])
1988 ],[
1989 AC_MSG_RESULT([no])
1990 AC_MSG_ERROR([
1991 *** This kernel does not include the required zlib inflate support.
1992 *** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
1993 ])
1994])
1995
1996dnl #
1997dnl # zlib deflate compat,
1998dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
1999dnl #
2000AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
2001 AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
2002 SPL_LINUX_TRY_COMPILE([
2003 #if !defined(CONFIG_ZLIB_DEFLATE) && \
2004 !defined(CONFIG_ZLIB_DEFLATE_MODULE)
2005 #error CONFIG_ZLIB_DEFLATE not defined
2006 #endif
2007 ],[ ],[
2008 AC_MSG_RESULT([yes])
2009 ],[
2010 AC_MSG_RESULT([no])
2011 AC_MSG_ERROR([
2012 *** This kernel does not include the required zlib deflate support.
2013 *** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
2014 ])
2015])
2016
3dfc591a
BB		 2017dnl #
2018dnl # 2.6.39 API compat,
2019dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
2020dnl # This was done to avoid always having to allocate the maximum size
2021dnl # workspace (268K). The caller can now specific the windowBits and
2022dnl # memLevel compression parameters to get a smaller workspace.
2023dnl #
2024AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
2025 [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
2026 SPL_LINUX_TRY_COMPILE([
2027 #include <linux/zlib.h>
2028 ],[
2029 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
2030 ],[
2031 AC_MSG_RESULT(yes)
2032 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
2033 [zlib_deflate_workspacesize() wants 2 args])
2034 ],[
2035 AC_MSG_RESULT(no)
2036 ])
2037])
a55bcaad
BB		 2038
2039dnl #
2040dnl # 2.6.39 API change,
2041dnl # Shrinker adjust to use common shrink_control structure.
2042dnl #
2043AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
2044 AC_MSG_CHECKING([whether struct shrink_control exists])
2045 SPL_LINUX_TRY_COMPILE([
2046 #include <linux/mm.h>
2047 ],[
2048 struct shrink_control sc __attribute__ ((unused));
2049
2050 sc.nr_to_scan = 0;
2051 sc.gfp_mask = GFP_KERNEL;
2052 ],[
2053 AC_MSG_RESULT(yes)
2054 AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
2055 [struct shrink_control exists])
2056 ],[
2057 AC_MSG_RESULT(no)
2058 ])
2059])
588d9004
DH		 2060
2061dnl #
2062dnl # 3.1 API Change
2063dnl #
2064dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
2065dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
2066dnl #
2067AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
2068 AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
2069 tmp_flags="$EXTRA_KCFLAGS"
2070 EXTRA_KCFLAGS="-Werror"
2071 SPL_LINUX_TRY_COMPILE([
2072 #include <linux/rwsem.h>
2073 ],[
2074 struct rw_semaphore dummy_semaphore __attribute__ ((unused));
2075 raw_spinlock_t dummy_lock __attribute__ ((unused));
2076 dummy_semaphore.wait_lock = dummy_lock;
2077 ],[
2078 AC_MSG_RESULT(yes)
2079 AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
2080 [struct rw_semaphore member wait_lock is raw_spinlock_t])
2081 ],[
2082 AC_MSG_RESULT(no)
2083 ])
2084 EXTRA_KCFLAGS="$tmp_flags"
2085])
10087fe1
RY		 2086
2087dnl #
2088dnl # 3.9 API change,
2089dnl # Moved things from linux/sched.h to linux/sched/rt.h
2090dnl #
2091AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
2092 [AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
2093 SPL_LINUX_TRY_COMPILE([
2094 #include <linux/sched.h>
2095 #include <linux/sched/rt.h>
2096 ],[
2097 return 0;
2098 ],[
2099 AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
2100 AC_MSG_RESULT(yes)
2101 ],[
2102 AC_MSG_RESULT(no)
2103 ])
2104])
2a305c34
RY		 2105
2106dnl #
2107dnl # 3.9 API change,
2108dnl # vfs_getattr() uses 2 args
2109dnl # It takes struct path * instead of struct vfsmount * and struct dentry *
2110dnl #
2111AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [
2112 AC_MSG_CHECKING([whether vfs_getattr() wants])
2113 SPL_LINUX_TRY_COMPILE([
2114 #include <linux/fs.h>
2115 ],[
2116 vfs_getattr((struct path *) NULL,
2117 (struct kstat *)NULL);
2118 ],[
2119 AC_MSG_RESULT(2 args)
2120 AC_DEFINE(HAVE_2ARGS_VFS_GETATTR, 1,
2121 [vfs_getattr wants 2 args])
2122 ],[
2123 SPL_LINUX_TRY_COMPILE([
2124 #include <linux/fs.h>
2125 ],[
2126 vfs_getattr((struct vfsmount *)NULL,
2127 (struct dentry *)NULL,
2128 (struct kstat *)NULL);
2129 ],[
2130 AC_MSG_RESULT(3 args)
2131 ],[
2132 AC_MSG_ERROR(unknown)
2133 ])
2134 ])
2135])
184c6873
NB		 2136
2137dnl #
2138dnl # 2.6.36 API compatibility.
2139dnl # Added usleep_range timer.
2140dnl # usleep_range is a finer precision implementation of msleep
2141dnl # designed to be a drop-in replacement for udelay where a precise
2142dnl # sleep / busy-wait is unnecessary.
2143dnl #
2144AC_DEFUN([SPL_AC_USLEEP_RANGE], [
2145 AC_MSG_CHECKING([whether usleep_range() is available])
2146 SPL_LINUX_TRY_COMPILE([
2147 #include <linux/delay.h>
2148 ],[
2149 usleep_range(0, 0);
2150 ],[
2151 AC_MSG_RESULT(yes)
2152 AC_DEFINE(HAVE_USLEEP_RANGE, 1,
2153 [usleep_range is available])
2154 ],[
2155 AC_MSG_RESULT(no)
2156 ])
2157])
a073aeb0
BB		 2158
2159dnl #
2160dnl # 2.6.35 API change,
2161dnl # The cachep->gfpflags member was renamed cachep->allocflags. These are
2162dnl # private allocation flags which are applied when allocating a new slab
2163dnl # in kmem_getpages(). Unfortunately there is no public API for setting
2164dnl # non-default flags.
2165dnl #
2166AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
2167 AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
2168 SPL_LINUX_TRY_COMPILE([
2169 #include <linux/slab.h>
2170 ],[
2171 struct kmem_cache cachep __attribute__ ((unused));
2172 cachep.allocflags = GFP_KERNEL;
2173 ],[
2174 AC_MSG_RESULT(yes)
2175 AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
2176 [struct kmem_cache has allocflags])
2177 ],[
2178 AC_MSG_RESULT(no)
2179
2180 AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
2181 SPL_LINUX_TRY_COMPILE([
2182 #include <linux/slab.h>
2183 ],[
2184 struct kmem_cache cachep __attribute__ ((unused));
2185 cachep.gfpflags = GFP_KERNEL;
2186 ],[
2187 AC_MSG_RESULT(yes)
2188 AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
2189 [struct kmem_cache has gfpflags])
2190 ],[
2191 AC_MSG_RESULT(no)
2192 ])
2193 ])
2194])
2fc44f66
NB		 2195
2196dnl #
2197dnl # 3.17 API change,
2198dnl # wait_on_bit() no longer requires an action argument. The former
2199dnl # "wait_on_bit" interface required an 'action' function to be provided
2200dnl # which does the actual waiting. There were over 20 such functions in the
2201dnl # kernel, many of them identical, though most cases can be satisfied by one
2202dnl # of just two functions: one which uses io_schedule() and one which just
2203dnl # uses schedule(). This API change was made to consolidate all of those
2204dnl # redundant wait functions.
2205dnl #
2206AC_DEFUN([SPL_AC_WAIT_ON_BIT], [
2207 AC_MSG_CHECKING([whether wait_on_bit() takes an action])
2208 SPL_LINUX_TRY_COMPILE([
2209 #include <linux/wait.h>
2210 ],[
2211 int (*action)(void *) = NULL;
2212 wait_on_bit(NULL, 0, action, 0);
2213 ],[
2214 AC_MSG_RESULT(yes)
2215 AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes])
2216 ],[
2217 AC_MSG_RESULT(no)
2218 ])
2219])
mirror of SPL module used by << 0.8.x ZFSOnLinux