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Avoid 'rpm -q' bug for 'make pkg'
[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
7731d46b 11 SPL_AC_KERNEL_CONFIG
86933a6e 12
86933a6e
BB		 13 if test "${LINUX_OBJ}" != "${LINUX}"; then
14 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
15 fi
86933a6e 16 AC_SUBST(KERNELMAKE_PARAMS)
a7958f7e
BB		 17
18 KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
86933a6e
BB		 19 AC_SUBST(KERNELCPPFLAGS)
20
21 SPL_AC_DEBUG
22 SPL_AC_DEBUG_KMEM
055ffd98 23 SPL_AC_DEBUG_KMEM_TRACKING
5e9b5d83 24 SPL_AC_ATOMIC_SPINLOCK
302b88e6
BB		 25 SPL_AC_TYPE_ATOMIC64_CMPXCHG
26 SPL_AC_TYPE_ATOMIC64_XCHG
d04c8a56 27 SPL_AC_TYPE_UINTPTR_T
86933a6e
BB		 28 SPL_AC_3ARGS_INIT_WORK
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
44 SPL_AC_FDTABLE_HEADER
45 SPL_AC_FILES_FDTABLE
46 SPL_AC_UACCESS_HEADER
47 SPL_AC_KMALLOC_NODE
48 SPL_AC_MONOTONIC_CLOCK
49 SPL_AC_INODE_I_MUTEX
4d54fdee 50 SPL_AC_MUTEX_OWNER
86933a6e 51 SPL_AC_MUTEX_LOCK_NESTED
86933a6e
BB		 52 SPL_AC_3ARGS_ON_EACH_CPU
53 SPL_AC_KALLSYMS_LOOKUP_NAME
54 SPL_AC_GET_VMALLOC_INFO
55 SPL_AC_PGDAT_HELPERS
56 SPL_AC_FIRST_ONLINE_PGDAT
57 SPL_AC_NEXT_ONLINE_PGDAT
58 SPL_AC_NEXT_ZONE
59 SPL_AC_PGDAT_LIST
86933a6e 60 SPL_AC_GLOBAL_PAGE_STATE
6ae7fef5
BB		 61 SPL_AC_ZONE_STAT_ITEM_FREE
62 SPL_AC_ZONE_STAT_ITEM_INACTIVE
63 SPL_AC_ZONE_STAT_ITEM_ACTIVE
64 SPL_AC_GET_ZONE_COUNTS
7119bf70 65 SPL_AC_USER_PATH_DIR
51a727e9
BB		 66 SPL_AC_SET_FS_PWD
67 SPL_AC_2ARGS_SET_FS_PWD
86933a6e
BB		 68 SPL_AC_2ARGS_VFS_UNLINK
69 SPL_AC_4ARGS_VFS_RENAME
9b2048c2 70 SPL_AC_FS_STRUCT_SPINLOCK
ec7d53e9
BB		 71 SPL_AC_CRED_STRUCT
72 SPL_AC_GROUPS_SEARCH
e811949a 73 SPL_AC_PUT_TASK_STRUCT
3977f837 74 SPL_AC_5ARGS_PROC_HANDLER
b868e22f 75 SPL_AC_KVASPRINTF
f0ff89fc 76 SPL_AC_3ARGS_FILE_FSYNC
46aa7b39 77 SPL_AC_EXPORTED_RWSEM_IS_LOCKED
914b0631 78 SPL_AC_KERNEL_INVALIDATE_INODES
9b0f9079 79 SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
e76f4bf1
BB		 80 SPL_AC_SHRINK_DCACHE_MEMORY
81 SPL_AC_SHRINK_ICACHE_MEMORY
b1cbc461 82 SPL_AC_KERN_PATH_PARENT
3dfc591a 83 SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
86933a6e
BB		 84])
85
86AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
bb339d06 87 modpost=$LINUX/scripts/Makefile.modpost
86933a6e 88 AC_MSG_CHECKING([kernel file name for module symbols])
bb339d06
BB		 89 if test -f "$modpost"; then
90 if grep -q Modules.symvers $modpost; then
91 LINUX_SYMBOLS=Modules.symvers
92 else
93 LINUX_SYMBOLS=Module.symvers
94 fi
912fd84d
BB		 95
96 if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
97 AC_MSG_ERROR([
98 *** Please make sure the kernel devel package for your distribution
99 *** is installed. If your building with a custom kernel make sure the
100 *** kernel is configured, built, and the '--with-linux=PATH' configure
101 *** option refers to the location of the kernel source.])
102 fi
86933a6e 103 else
bb339d06 104 LINUX_SYMBOLS=NONE
86933a6e
BB		 105 fi
106 AC_MSG_RESULT($LINUX_SYMBOLS)
107 AC_SUBST(LINUX_SYMBOLS)
108])
109
57d86234 110AC_DEFUN([SPL_AC_KERNEL], [
57d86234 111 AC_ARG_WITH([linux],
112 AS_HELP_STRING([--with-linux=PATH],
113 [Path to kernel source]),
39a3d2a4 114 [kernelsrc="$withval"])
57d86234 115
116 AC_ARG_WITH([linux-obj],
117 AS_HELP_STRING([--with-linux-obj=PATH],
118 [Path to kernel build objects]),
119 [kernelbuild="$withval"])
120
121 AC_MSG_CHECKING([kernel source directory])
122 if test -z "$kernelsrc"; then
22ccfaa8
BB		 123 if test -e "/lib/modules/$(uname -r)/source"; then
124 headersdir="/lib/modules/$(uname -r)/source"
125 sourcelink=$(readlink -f "$headersdir")
126 elif test -e "/lib/modules/$(uname -r)/build"; then
127 headersdir="/lib/modules/$(uname -r)/build"
534c4e38
BM		 128 sourcelink=$(readlink -f "$headersdir")
129 else
130 sourcelink=$(ls -1d /usr/src/kernels/* \
131 /usr/src/linux-* \
132 2>/dev/null | grep -v obj | tail -1)
133 fi
57d86234 134
8fd4e3af 135 if test -n "$sourcelink" && test -e ${sourcelink}; then
d4326403 136 kernelsrc=`readlink -f ${sourcelink}`
d4326403 137 else
57d86234 138 AC_MSG_RESULT([Not found])
139 AC_MSG_ERROR([
8fd4e3af
BB		 140 *** Please make sure the kernel devel package for your distribution
141 *** is installed then try again. If that fails you can specify the
142 *** location of the kernel source with the '--with-linux=PATH' option.])
57d86234 143 fi
c5f70460
BB		 144 else
145 if test "$kernelsrc" = "NONE"; then
146 kernsrcver=NONE
147 fi
57d86234 148 fi
149
150 AC_MSG_RESULT([$kernelsrc])
151 AC_MSG_CHECKING([kernel build directory])
39a3d2a4 152 if test -z "$kernelbuild"; then
22ccfaa8
BB		 153 if test -e "/lib/modules/$(uname -r)/build"; then
154 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
155 elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
e2d28a37
BB		 156 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
157 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
158 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
159 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
160 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
39a3d2a4
BB		 161 else
162 kernelbuild=${kernelsrc}
163 fi
bf338d8d 164 fi
57d86234 165 AC_MSG_RESULT([$kernelbuild])
166
167 AC_MSG_CHECKING([kernel source version])
fd921c2e
BB		 168 utsrelease1=$kernelbuild/include/linux/version.h
169 utsrelease2=$kernelbuild/include/linux/utsrelease.h
170 utsrelease3=$kernelbuild/include/generated/utsrelease.h
171 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
172 utsrelease=linux/version.h
173 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
174 utsrelease=linux/utsrelease.h
175 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
176 utsrelease=generated/utsrelease.h
177 fi
57d86234 178
fd921c2e
BB		 179 if test "$utsrelease"; then
180 kernsrcver=`(echo "#include <$utsrelease>";
57d86234 181 echo "kernsrcver=UTS_RELEASE") |
d4326403 182 cpp -I $kernelbuild/include |
57d86234 183 grep "^kernsrcver=" | cut -d \" -f 2`
57d86234 184
fd921c2e
BB		 185 if test -z "$kernsrcver"; then
186 AC_MSG_RESULT([Not found])
187 AC_MSG_ERROR([*** Cannot determine kernel version.])
188 fi
189 else
57d86234 190 AC_MSG_RESULT([Not found])
fd921c2e 191 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
57d86234 192 fi
193
194 AC_MSG_RESULT([$kernsrcver])
195
57d86234 196 LINUX=${kernelsrc}
197 LINUX_OBJ=${kernelbuild}
c5f70460
BB		 198 LINUX_VERSION=${kernsrcver}
199
57d86234 200 AC_SUBST(LINUX)
201 AC_SUBST(LINUX_OBJ)
c5f70460 202 AC_SUBST(LINUX_VERSION)
57d86234 203
86933a6e 204 SPL_AC_MODULE_SYMVERS
2e0e7e69
BB		 205])
206
7731d46b
BB		 207AC_DEFUN([SPL_AC_KERNEL_CONFIG], [
208 SPL_LINUX_CONFIG([PREEMPT],
209 AC_MSG_ERROR([
210 *** Kernel built with CONFIG_PREEMPT which is not supported.
211 ** You must rebuild your kernel without this option.]), [])
212])
213
287b2fb1
BB		 214dnl #
215dnl # Default SPL user configuration
216dnl #
ad35b6a6 217AC_DEFUN([SPL_AC_CONFIG_USER], [])
287b2fb1
BB		 218
219dnl #
220dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
221dnl # are missing it is non-fatal but you will not be able to build
222dnl # RPM packages and will be warned if you try too.
223dnl #
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
248 AC_SUBST(HAVE_RPM)
249 AC_SUBST(RPM)
250 AC_SUBST(RPM_VERSION)
251
252 AC_SUBST(HAVE_RPMBUILD)
253 AC_SUBST(RPMBUILD)
254 AC_SUBST(RPMBUILD_VERSION)
255])
256
257dnl #
258dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
259dnl # tools are missing it is non-fatal but you will not be able to build
260dnl # DEB packages and will be warned if you try too.
261dnl #
262AC_DEFUN([SPL_AC_DPKG], [
263 DPKG=dpkg
264 DPKGBUILD=dpkg-buildpackage
265
266 AC_MSG_CHECKING([whether $DPKG is available])
267 AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
268 DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
269 HAVE_DPKG=yes
270 AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
271 ],[
272 HAVE_DPKG=no
273 AC_MSG_RESULT([$HAVE_DPKG])
274 ])
275
276 AC_MSG_CHECKING([whether $DPKGBUILD is available])
277 AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
278 DPKGBUILD_VERSION=$(echo $tmp | \
279 $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
280 HAVE_DPKGBUILD=yes
281 AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
282 ],[
283 HAVE_DPKGBUILD=no
284 AC_MSG_RESULT([$HAVE_DPKGBUILD])
285 ])
286
287 AC_SUBST(HAVE_DPKG)
288 AC_SUBST(DPKG)
289 AC_SUBST(DPKG_VERSION)
290
291 AC_SUBST(HAVE_DPKGBUILD)
292 AC_SUBST(DPKGBUILD)
293 AC_SUBST(DPKGBUILD_VERSION)
294])
295
296dnl #
297dnl # Until native packaging for various different packing systems
298dnl # can be added the least we can do is attempt to use alien to
299dnl # convert the RPM packages to the needed package type. This is
300dnl # a hack but so far it has worked reasonable well.
301dnl #
302AC_DEFUN([SPL_AC_ALIEN], [
303 ALIEN=alien
304
305 AC_MSG_CHECKING([whether $ALIEN is available])
306 AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
307 ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
308 HAVE_ALIEN=yes
309 AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
310 ],[
311 HAVE_ALIEN=no
312 AC_MSG_RESULT([$HAVE_ALIEN])
313 ])
314
315 AC_SUBST(HAVE_ALIEN)
316 AC_SUBST(ALIEN)
317 AC_SUBST(ALIEN_VERSION)
318])
319
320dnl #
321dnl # Using the VENDOR tag from config.guess set the default
322dnl # package type for 'make pkg': (rpm | deb | tgz)
323dnl #
324AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
73fc084e
BB		 325 AC_MSG_CHECKING([linux distribution])
326 if test -f /etc/redhat-release ; then
327 VENDOR=redhat ;
328 elif test -f /etc/fedora-release ; then
329 VENDOR=fedora ;
330 elif test -f /etc/lsb-release ; then
331 VENDOR=ubuntu ;
332 elif test -f /etc/debian_version ; then
333 VENDOR=debian ;
334 elif test -f /etc/SuSE-release ; then
335 VENDOR=sles ;
336 elif test -f /etc/slackware-version ; then
337 VENDOR=slackware ;
338 elif test -f /etc/gentoo-release ; then
339 VENDOR=gentoo ;
340 else
341 VENDOR= ;
342 fi
343 AC_MSG_RESULT([$VENDOR])
344 AC_SUBST(VENDOR)
287b2fb1
BB		 345
346 AC_MSG_CHECKING([default package type])
347 case "$VENDOR" in
348 fedora) DEFAULT_PACKAGE=rpm ;;
349 redhat) DEFAULT_PACKAGE=rpm ;;
350 sles) DEFAULT_PACKAGE=rpm ;;
351 ubuntu) DEFAULT_PACKAGE=deb ;;
352 debian) DEFAULT_PACKAGE=deb ;;
353 slackware) DEFAULT_PACKAGE=tgz ;;
354 *) DEFAULT_PACKAGE=rpm ;;
355 esac
356
357 AC_MSG_RESULT([$DEFAULT_PACKAGE])
358 AC_SUBST(DEFAULT_PACKAGE)
359])
360
361dnl #
362dnl # Default SPL user configuration
363dnl #
364AC_DEFUN([SPL_AC_PACKAGE], [
365 SPL_AC_RPM
366 SPL_AC_DPKG
367 SPL_AC_ALIEN
368 SPL_AC_DEFAULT_PACKAGE
369])
370
6a1c3d41 371AC_DEFUN([SPL_AC_LICENSE], [
86933a6e
BB		 372 AC_MSG_CHECKING([spl license])
373 LICENSE=GPL
374 AC_MSG_RESULT([$LICENSE])
6a1c3d41 375 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
86933a6e
BB		 376 AC_SUBST(LICENSE)
377])
378
379AC_DEFUN([SPL_AC_CONFIG], [
380 SPL_CONFIG=all
381 AC_ARG_WITH([config],
382 AS_HELP_STRING([--with-config=CONFIG],
c1541dfe 383 [Config file 'kernel|user|all|srpm']),
86933a6e
BB		 384 [SPL_CONFIG="$withval"])
385
386 AC_MSG_CHECKING([spl config])
387 AC_MSG_RESULT([$SPL_CONFIG]);
388 AC_SUBST(SPL_CONFIG)
389
390 case "$SPL_CONFIG" in
391 kernel) SPL_AC_CONFIG_KERNEL ;;
392 user) SPL_AC_CONFIG_USER ;;
393 all) SPL_AC_CONFIG_KERNEL
394 SPL_AC_CONFIG_USER ;;
c1541dfe 395 srpm) ;;
86933a6e
BB		 396 *)
397 AC_MSG_RESULT([Error!])
398 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
c1541dfe 399 user kernel|user|all|srpm]) ;;
86933a6e
BB		 400 esac
401
402 AM_CONDITIONAL([CONFIG_USER],
403 [test "$SPL_CONFIG" = user] ||
404 [test "$SPL_CONFIG" = all])
405 AM_CONDITIONAL([CONFIG_KERNEL],
406 [test "$SPL_CONFIG" = kernel] ||
407 [test "$SPL_CONFIG" = all])
6a1c3d41 408])
409
055ffd98
BB		 410dnl #
411dnl # Enable if the SPL should be compiled with internal debugging enabled.
412dnl # By default this support is disabled.
413dnl #
57d86234 414AC_DEFUN([SPL_AC_DEBUG], [
c950d148 415 AC_MSG_CHECKING([whether debugging is enabled])
055ffd98
BB		 416 AC_ARG_ENABLE([debug],
417 [AS_HELP_STRING([--enable-debug],
418 [Enable generic debug support @<:@default=no@:>@])],
419 [],
420 [enable_debug=no])
421
422 AS_IF([test "x$enable_debug" = xyes],
c950d148 423 [
c950d148
BB		 424 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
425 DEBUG_CFLAGS="-DDEBUG -Werror"
426 ],
427 [
c950d148
BB		 428 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
429 DEBUG_CFLAGS="-DNDEBUG"
430 ])
055ffd98 431
c950d148 432 AC_SUBST(DEBUG_CFLAGS)
055ffd98 433 AC_MSG_RESULT([$enable_debug])
57d86234 434])
435
055ffd98
BB		 436dnl #
437dnl # Enabled by default it provides a minimal level of memory tracking.
438dnl # A total count of bytes allocated is kept for each alloc and free.
439dnl # Then at module unload time a report to the console will be printed
440dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
441dnl # and provide an easy way to inspect the kmem based slab.
442dnl #
57d86234 443AC_DEFUN([SPL_AC_DEBUG_KMEM], [
055ffd98
BB		 444 AC_ARG_ENABLE([debug-kmem],
445 [AS_HELP_STRING([--enable-debug-kmem],
446 [Enable basic kmem accounting @<:@default=yes@:>@])],
447 [],
448 [enable_debug_kmem=yes])
57d86234 449
055ffd98
BB		 450 AS_IF([test "x$enable_debug_kmem" = xyes],
451 [AC_DEFINE([DEBUG_KMEM], [1],
452 [Define to 1 to enable basic kmem accounting])
453 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"])
454
455 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
456 AC_MSG_RESULT([$enable_debug_kmem])
57d86234 457])
458
055ffd98
BB		 459dnl #
460dnl # Disabled by default it provides detailed memory tracking. This
461dnl # feature also requires --enable-debug-kmem to be set. When enabled
462dnl # not only will total bytes be tracked but also the location of every
463dnl # alloc and free. When the SPL module is unloaded a list of all leaked
464dnl # addresses and where they were allocated will be dumped to the console.
465dnl # Enabling this feature has a significant impact on performance but it
466dnl # makes finding memory leaks pretty straight forward.
467dnl #
468AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
469 AC_ARG_ENABLE([debug-kmem-tracking],
470 [AS_HELP_STRING([--enable-debug-kmem-tracking],
471 [Enable detailed kmem tracking @<:@default=no@:>@])],
472 [],
473 [enable_debug_kmem_tracking=no])
474
475 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
476 [AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
477 [Define to 1 to enable detailed kmem tracking])
478 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"])
479
480 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
481 AC_MSG_RESULT([$enable_debug_kmem_tracking])
57d86234 482])
483
484dnl #
485dnl # SPL_LINUX_CONFTEST
486dnl #
487AC_DEFUN([SPL_LINUX_CONFTEST], [
dbe561d8 488cat confdefs.h - <<_ACEOF >conftest.c
57d86234 489$1
490_ACEOF
491])
492
493dnl #
494dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
495dnl #
496m4_define([SPL_LANG_PROGRAM], [
497$1
498int
499main (void)
500{
501dnl Do *not* indent the following line: there may be CPP directives.
502dnl Don't move the `;' right after for the same reason.
503$2
504 ;
505 return 0;
506}
507])
508
509dnl #
510dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
511dnl #
512AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
c5f70460
BB		 513 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
514 rm -Rf build && mkdir -p build
515 echo "obj-m := conftest.o" >build/Makefile
516 AS_IF(
3d0cb2d3 517 [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) >/dev/null && AC_TRY_COMMAND([$3])],
c5f70460
BB		 518 [$4],
519 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
520 )
521 rm -Rf build
57d86234 522])
523
524dnl #
525dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
526dnl #
527AC_DEFUN([SPL_LINUX_TRY_COMPILE],
528 [SPL_LINUX_COMPILE_IFELSE(
d50bd9e2 529 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
530 [modules],
531 [test -s build/conftest.o],
532 [$3], [$4])
57d86234 533])
534
535dnl #
536dnl # SPL_LINUX_CONFIG
537dnl #
538AC_DEFUN([SPL_LINUX_CONFIG],
539 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
540 SPL_LINUX_TRY_COMPILE([
541 #ifndef AUTOCONF_INCLUDED
542 #include <linux/config.h>
543 #endif
544 ],[
545 #ifndef CONFIG_$1
546 #error CONFIG_$1 not #defined
547 #endif
548 ],[
549 AC_MSG_RESULT([yes])
550 $2
551 ],[
552 AC_MSG_RESULT([no])
553 $3
554 ])
555])
556
557dnl #
558dnl # SPL_CHECK_SYMBOL_EXPORT
559dnl # check symbol exported or not
560dnl #
561AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
562 [AC_MSG_CHECKING([whether symbol $1 is exported])
2e0e7e69
BB		 563 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
564 $LINUX_OBJ/Module*.symvers 2>/dev/null
57d86234 565 rc=$?
566 if test $rc -ne 0; then
567 export=0
568 for file in $2; do
2e0e7e69
BB		 569 grep -q -E "EXPORT_SYMBOL.*($1)" \
570 "$LINUX_OBJ/$file" 2>/dev/null
57d86234 571 rc=$?
572 if test $rc -eq 0; then
573 export=1
574 break;
575 fi
576 done
577 if test $export -eq 0; then
578 AC_MSG_RESULT([no])
579 $4
580 else
581 AC_MSG_RESULT([yes])
582 $3
583 fi
584 else
585 AC_MSG_RESULT([yes])
586 $3
587 fi
588])
589
86de8532 590dnl #
591dnl # SPL_CHECK_HEADER
592dnl # check whether header exists and define HAVE_$2_HEADER
593dnl #
594AC_DEFUN([SPL_CHECK_HEADER],
595 [AC_MSG_CHECKING([whether header $1 exists])
596 SPL_LINUX_TRY_COMPILE([
d50bd9e2 597 #include <$1>
86de8532 598 ],[
599 return 0;
600 ],[
601 AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
602 AC_MSG_RESULT(yes)
603 $3
604 ],[
605 AC_MSG_RESULT(no)
606 $4
607 ])
608])
6a6cafbe 609
57d86234 610dnl #
d04c8a56
BB		 611dnl # Use the atomic implemenation based on global spinlocks. This
612dnl # should only be needed by 32-bit kernels which do not provide
613dnl # the atomic64_* API. It may be optionally enabled as a fallback
614dnl # if problems are observed with the direct mapping to the native
615dnl # Linux atomic operations. You may not disable atomic spinlocks
616dnl # if you kernel does not an atomic64_* API.
57d86234 617dnl #
d04c8a56
BB		 618AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
619 AC_ARG_ENABLE([atomic-spinlocks],
620 [AS_HELP_STRING([--enable-atomic-spinlocks],
621 [Atomic types use spinlocks @<:@default=check@:>@])],
622 [],
623 [enable_atomic_spinlocks=check])
57d86234 624
a0f6da3d 625 SPL_LINUX_TRY_COMPILE([
626 #include <asm/atomic.h>
627 ],[
03318641 628 atomic64_t *ptr __attribute__ ((unused));
a0f6da3d 629 ],[
d04c8a56 630 have_atomic64_t=yes
a0f6da3d 631 AC_DEFINE(HAVE_ATOMIC64_T, 1,
d04c8a56 632 [kernel defines atomic64_t])
a0f6da3d 633 ],[
d04c8a56
BB		 634 have_atomic64_t=no
635 ])
636
637 AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
638 AS_IF([test "x$have_atomic64_t" = xyes], [
639 enable_atomic_spinlocks=no
640 ],[
641 enable_atomic_spinlocks=yes
642 ])
a0f6da3d 643 ])
d04c8a56
BB		 644
645 AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
646 AC_DEFINE([ATOMIC_SPINLOCK], [1],
647 [Atomic types use spinlocks])
648 ],[
649 AS_IF([test "x$have_atomic64_t" = xno], [
650 AC_MSG_FAILURE(
651 [--disable-atomic-spinlocks given but required atomic64 support is unavailable])
652 ])
653 ])
654
655 AC_MSG_CHECKING([whether atomic types use spinlocks])
656 AC_MSG_RESULT([$enable_atomic_spinlocks])
657
658 AC_MSG_CHECKING([whether kernel defines atomic64_t])
659 AC_MSG_RESULT([$have_atomic64_t])
a0f6da3d 660])
661
302b88e6
BB		 662dnl #
663dnl # 2.6.24 API change,
664dnl # check if atomic64_cmpxchg is defined
665dnl #
666AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
667 [AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
668 SPL_LINUX_TRY_COMPILE([
669 #include <asm/atomic.h>
5ec44a37 670 #include <asm/system.h>
302b88e6
BB		 671 ],[
672 atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
673 ],[
674 AC_MSG_RESULT([yes])
675 AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
676 [kernel defines atomic64_cmpxchg])
677 ],[
678 AC_MSG_RESULT([no])
679 ])
680])
681
682dnl #
683dnl # 2.6.24 API change,
684dnl # check if atomic64_xchg is defined
685dnl #
686AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
687 [AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
688 SPL_LINUX_TRY_COMPILE([
689 #include <asm/atomic.h>
690 ],[
691 atomic64_xchg((atomic64_t *)NULL, 0);
692 ],[
693 AC_MSG_RESULT([yes])
694 AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
695 [kernel defines atomic64_xchg])
696 ],[
697 AC_MSG_RESULT([no])
698 ])
699])
700
d04c8a56
BB		 701dnl #
702dnl # 2.6.24 API change,
703dnl # check if uintptr_t typedef is defined
704dnl #
705AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
706 [AC_MSG_CHECKING([whether kernel defines uintptr_t])
707 SPL_LINUX_TRY_COMPILE([
708 #include <linux/types.h>
709 ],[
03318641 710 uintptr_t *ptr __attribute__ ((unused));
d04c8a56
BB		 711 ],[
712 AC_MSG_RESULT([yes])
713 AC_DEFINE(HAVE_UINTPTR_T, 1,
714 [kernel defines uintptr_t])
715 ],[
716 AC_MSG_RESULT([no])
717 ])
718])
719
57d86234 720dnl #
3d061e9d 721dnl # 2.6.20 API change,
57d86234 722dnl # INIT_WORK use 2 args and not store data inside
723dnl #
724AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
725 [AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
726 SPL_LINUX_TRY_COMPILE([
d50bd9e2 727 #include <linux/workqueue.h>
57d86234 728 ],[
03318641 729 struct work_struct work __attribute__ ((unused));
d50bd9e2 730 INIT_WORK(&work, NULL, NULL);
57d86234 731 ],[
d50bd9e2 732 AC_MSG_RESULT(yes)
733 AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
734 [INIT_WORK wants 3 args])
57d86234 735 ],[
d50bd9e2 736 AC_MSG_RESULT(no)
57d86234 737 ])
738])
739
740dnl #
3d061e9d 741dnl # 2.6.21 API change,
57d86234 742dnl # 'register_sysctl_table' use only one argument instead of two
743dnl #
744AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
745 [AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
746 SPL_LINUX_TRY_COMPILE([
d50bd9e2 747 #include <linux/sysctl.h>
57d86234 748 ],[
03318641 749 (void) register_sysctl_table(NULL, 0);
57d86234 750 ],[
d50bd9e2 751 AC_MSG_RESULT(yes)
752 AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
753 [register_sysctl_table() wants 2 args])
57d86234 754 ],[
d50bd9e2 755 AC_MSG_RESULT(no)
57d86234 756 ])
757])
758
57d86234 759dnl #
3d061e9d 760dnl # 2.6.23 API change
57d86234 761dnl # Old set_shrinker API replaced with register_shrinker
762dnl #
763AC_DEFUN([SPL_AC_SET_SHRINKER], [
764 AC_MSG_CHECKING([whether set_shrinker() available])
765 SPL_LINUX_TRY_COMPILE([
766 #include <linux/mm.h>
767 ],[
768 return set_shrinker(DEFAULT_SEEKS, NULL);
769 ],[
770 AC_MSG_RESULT([yes])
771 AC_DEFINE(HAVE_SET_SHRINKER, 1,
772 [set_shrinker() available])
773 ],[
774 AC_MSG_RESULT([no])
775 ])
776])
777
23aa63cb
BB		 778dnl #
779dnl # 2.6.35 API change,
780dnl # Add context to shrinker callback
781dnl #
782AC_DEFUN([SPL_AC_3ARGS_SHRINKER_CALLBACK],
783 [AC_MSG_CHECKING([whether shrinker callback wants 3 args])
784 tmp_flags="$EXTRA_KCFLAGS"
785 EXTRA_KCFLAGS="-Werror"
786 SPL_LINUX_TRY_COMPILE([
787 #include <linux/mm.h>
788
789 int shrinker_cb(struct shrinker *, int, unsigned int);
790 ],[
791 struct shrinker cache_shrinker = {
792 .shrink = shrinker_cb,
793 .seeks = DEFAULT_SEEKS,
794 };
795 register_shrinker(&cache_shrinker);
796 ],[
797 AC_MSG_RESULT(yes)
798 AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
799 [shrinker callback wants 3 args])
800 ],[
801 AC_MSG_RESULT(no)
802 ])
803 EXTRA_KCFLAGS="$tmp_flags"
804])
805
57d86234 806dnl #
3d061e9d 807dnl # 2.6.25 API change,
57d86234 808dnl # struct path entry added to struct nameidata
809dnl #
810AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
811 [AC_MSG_CHECKING([whether struct path used in struct nameidata])
812 SPL_LINUX_TRY_COMPILE([
d50bd9e2 813 #include <linux/namei.h>
57d86234 814 ],[
03318641 815 struct nameidata nd __attribute__ ((unused));
57d86234 816
817 nd.path.mnt = NULL;
818 nd.path.dentry = NULL;
819 ],[
d50bd9e2 820 AC_MSG_RESULT(yes)
821 AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
822 [struct path used in struct nameidata])
57d86234 823 ],[
d50bd9e2 824 AC_MSG_RESULT(no)
57d86234 825 ])
826])
827
828dnl #
829dnl # Custom SPL patch may export this system it is not required
830dnl #
831AC_DEFUN([SPL_AC_TASK_CURR], [
832 SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
833 [AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
834 [])
835])
836
837dnl #
3d061e9d 838dnl # 2.6.19 API change,
57d86234 839dnl # Use CTL_UNNUMBERED when binary sysctl is not required
840dnl #
841AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
842 [AC_MSG_CHECKING([whether unnumbered sysctl support exists])
843 SPL_LINUX_TRY_COMPILE([
d50bd9e2 844 #include <linux/sysctl.h>
57d86234 845 ],[
846 #ifndef CTL_UNNUMBERED
847 #error CTL_UNNUMBERED undefined
848 #endif
849 ],[
d50bd9e2 850 AC_MSG_RESULT(yes)
851 AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
852 [unnumbered sysctl support exists])
57d86234 853 ],[
d50bd9e2 854 AC_MSG_RESULT(no)
57d86234 855 ])
856])
877a32e9 857
79a3bf13
BB		 858dnl #
859dnl # 2.6.33 API change,
860dnl # Removed .ctl_name from struct ctl_table.
861dnl #
862AC_DEFUN([SPL_AC_CTL_NAME], [
863 AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
864 SPL_LINUX_TRY_COMPILE([
865 #include <linux/sysctl.h>
866 ],[
03318641 867 struct ctl_table ctl __attribute__ ((unused));
79a3bf13
BB		 868 ctl.ctl_name = 0;
869 ],[
870 AC_MSG_RESULT(yes)
871 AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
872 ],[
873 AC_MSG_RESULT(no)
874 ])
875])
876
877a32e9 877dnl #
878dnl # 2.6.16 API change.
879dnl # Check if 'fls64()' is available
880dnl #
881AC_DEFUN([SPL_AC_FLS64],
6a6cafbe 882 [AC_MSG_CHECKING([whether fls64() is available])
883 SPL_LINUX_TRY_COMPILE([
884 #include <linux/bitops.h>
885 ],[
886 return fls64(0);
887 ],[
888 AC_MSG_RESULT(yes)
889 AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
890 ],[
891 AC_MSG_RESULT(no)
892 ])
877a32e9 893])
46c685d0 894
895dnl #
896dnl # 2.6.18 API change, check whether device_create() is available.
897dnl # Device_create() was introduced in 2.6.18 and depricated
898dnl # class_device_create() which was fully removed in 2.6.26.
899dnl #
900AC_DEFUN([SPL_AC_DEVICE_CREATE], [
901 SPL_CHECK_SYMBOL_EXPORT(
902 [device_create],
903 [drivers/base/core.c],
904 [AC_DEFINE(HAVE_DEVICE_CREATE, 1,
905 [device_create() is available])],
6a6cafbe 906 [])
46c685d0 907])
908
8123ac4f
BB		 909dnl #
910dnl # 2.6.27 API change,
911dnl # device_create() uses 5 args, new 'drvdata' argument.
912dnl #
913AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
914 AC_MSG_CHECKING([whether device_create() wants 5 args])
915 tmp_flags="$EXTRA_KCFLAGS"
916 EXTRA_KCFLAGS="-Werror"
917 SPL_LINUX_TRY_COMPILE([
918 #include <linux/device.h>
919 ],[
920 device_create(NULL, NULL, 0, NULL, "%d", 1);
921 ],[
922 AC_MSG_RESULT(yes)
923 AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
924 [device_create wants 5 args])
925 ],[
926 AC_MSG_RESULT(no)
927 ])
928 EXTRA_KCFLAGS="$tmp_flags"
929])
930
46c685d0 931dnl #
932dnl # 2.6.13 API change, check whether class_device_create() is available.
933dnl # Class_device_create() was introduced in 2.6.13 and depricated
934dnl # class_simple_device_add() which was fully removed in 2.6.13.
935dnl #
936AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
937 SPL_CHECK_SYMBOL_EXPORT(
938 [class_device_create],
939 [drivers/base/class.c],
940 [AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
941 [class_device_create() is available])],
6a6cafbe 942 [])
46c685d0 943])
6a6cafbe 944
6a6cafbe 945dnl #
946dnl # 2.6.26 API change, set_normalized_timespec() is exported.
947dnl #
948AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
949 SPL_CHECK_SYMBOL_EXPORT(
950 [set_normalized_timespec],
951 [kernel/time.c],
952 [AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
953 [set_normalized_timespec() is available as export])],
954 [])
955])
956
957dnl #
958dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
959dnl # previously it was available in time.h as an inline.
960dnl #
86de8532 961AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
962 AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
6a6cafbe 963 SPL_LINUX_TRY_COMPILE([
964 #include <linux/time.h>
6a6cafbe 965 void set_normalized_timespec(struct timespec *ts,
25557fd8 966 time_t sec, long nsec) { }
967 ],
968 [],
969 [
6a6cafbe 970 AC_MSG_RESULT(no)
971 ],[
972 AC_MSG_RESULT(yes)
973 AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
974 [set_normalized_timespec() is available as inline])
975 ])
976])
977
978dnl #
979dnl # 2.6.18 API change,
980dnl # timespec_sub() inline function available in linux/time.h
981dnl #
86de8532 982AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
983 AC_MSG_CHECKING([whether timespec_sub() is available])
6a6cafbe 984 SPL_LINUX_TRY_COMPILE([
985 #include <linux/time.h>
986 ],[
03318641
BB		 987 struct timespec a = { 0 };
988 struct timespec b = { 0 };
989 struct timespec c __attribute__ ((unused));
6a6cafbe 990 c = timespec_sub(a, b);
991 ],[
992 AC_MSG_RESULT(yes)
993 AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
994 ],[
995 AC_MSG_RESULT(no)
996 ])
997])
998
86de8532 999dnl #
3d061e9d 1000dnl # 2.6.19 API change,
1001dnl # check if init_utsname() is available in linux/utsname.h
1002dnl #
1003AC_DEFUN([SPL_AC_INIT_UTSNAME], [
1004 AC_MSG_CHECKING([whether init_utsname() is available])
1005 SPL_LINUX_TRY_COMPILE([
1006 #include <linux/utsname.h>
1007 ],[
03318641
BB		 1008 struct new_utsname *a __attribute__ ((unused));
1009 a = init_utsname();
3d061e9d 1010 ],[
1011 AC_MSG_RESULT(yes)
1012 AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
1013 ],[
1014 AC_MSG_RESULT(no)
1015 ])
1016])
1017
1018dnl #
1019dnl # 2.6.26 API change,
1020dnl # definition of struct fdtable relocated to linux/fdtable.h
86de8532 1021dnl #
1022AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
1023 SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
1024])
322640b7 1025
1026dnl #
3d061e9d 1027dnl # 2.6.14 API change,
1028dnl # check whether 'files_fdtable()' exists
1029dnl #
1030AC_DEFUN([SPL_AC_FILES_FDTABLE], [
1031 AC_MSG_CHECKING([whether files_fdtable() is available])
1032 SPL_LINUX_TRY_COMPILE([
1033 #include <linux/sched.h>
1034 #include <linux/file.h>
1035 #ifdef HAVE_FDTABLE_HEADER
1036 #include <linux/fdtable.h>
1037 #endif
1038 ],[
1039 struct files_struct *files = current->files;
03318641
BB		 1040 struct fdtable *fdt __attribute__ ((unused));
1041 fdt = files_fdtable(files);
3d061e9d 1042 ],[
1043 AC_MSG_RESULT(yes)
1044 AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
1045 ],[
1046 AC_MSG_RESULT(no)
1047 ])
1048])
1049
1050dnl #
1051dnl # 2.6.18 API change,
1052dnl # added linux/uaccess.h
322640b7 1053dnl #
1054AC_DEFUN([SPL_AC_UACCESS_HEADER], [
1055 SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
1056])
3d061e9d 1057
1058dnl #
1059dnl # 2.6.12 API change,
1060dnl # check whether 'kmalloc_node()' is available.
1061dnl #
1062AC_DEFUN([SPL_AC_KMALLOC_NODE], [
1063 AC_MSG_CHECKING([whether kmalloc_node() is available])
1064 SPL_LINUX_TRY_COMPILE([
1065 #include <linux/slab.h>
1066 ],[
03318641
BB		 1067 void *a __attribute__ ((unused));
1068 a = kmalloc_node(1, GFP_KERNEL, 0);
3d061e9d 1069 ],[
1070 AC_MSG_RESULT(yes)
1071 AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
1072 ],[
1073 AC_MSG_RESULT(no)
1074 ])
1075])
1076
1077dnl #
1078dnl # 2.6.9 API change,
1079dnl # check whether 'monotonic_clock()' is available it may
1080dnl # be available for some archs but not others.
1081dnl #
1082AC_DEFUN([SPL_AC_MONOTONIC_CLOCK], [
1083 SPL_CHECK_SYMBOL_EXPORT(
1084 [monotonic_clock],
1085 [],
1086 [AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
1087 [monotonic_clock() is available])],
1088 [])
1089])
1090
1091dnl #
1092dnl # 2.6.16 API change,
1093dnl # check whether 'struct inode' has i_mutex
1094dnl #
1095AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
1096 AC_MSG_CHECKING([whether struct inode has i_mutex])
1097 SPL_LINUX_TRY_COMPILE([
1098 #include <linux/fs.h>
1099 #include <linux/mutex.h>
1100 ],[
1101 struct inode i;
1102 mutex_init(&i.i_mutex);
1103 ],[
1104 AC_MSG_RESULT(yes)
1105 AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
1106 ],[
1107 AC_MSG_RESULT(no)
1108 ])
1109])
b61a6e8b 1110
4d54fdee
BB		 1111dnl #
1112dnl # 2.6.29 API change,
1113dnl # Adaptive mutexs introduced.
1114dnl #
1115AC_DEFUN([SPL_AC_MUTEX_OWNER], [
1116 AC_MSG_CHECKING([whether struct mutex has owner])
1117 SPL_LINUX_TRY_COMPILE([
1118 #include <linux/mutex.h>
1119 ],[
03318641 1120 struct mutex mtx __attribute__ ((unused));
4d54fdee
BB		 1121 mtx.owner = NULL;
1122 ],[
1123 AC_MSG_RESULT(yes)
1124 AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
1125 ],[
1126 AC_MSG_RESULT(no)
1127 ])
1128])
1129
6c9433c1
BB		 1130dnl #
1131dnl # 2.6.18 API change,
1132dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
1133dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
1134dnl # if the mutex validator is disabled or otherwise unavailable.
1135dnl #
1136AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
1137 AC_MSG_CHECKING([whether mutex_lock_nested() is available])
1138 SPL_LINUX_TRY_COMPILE([
1139 #include <linux/mutex.h>
1140 ],[
1141 struct mutex mutex;
1142 mutex_init(&mutex);
1143 mutex_lock_nested(&mutex, 0);
1144 ],[
1145 AC_MSG_RESULT(yes)
1146 AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
1147 [mutex_lock_nested() is available])
1148 ],[
1149 AC_MSG_RESULT(no)
1150 ])
1151])
1152
31a033ec
BB		 1153dnl #
1154dnl # 2.6.27 API change,
1155dnl # on_each_cpu() uses 3 args, no 'retry' argument
1156dnl #
1157AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
1158 AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
1159 SPL_LINUX_TRY_COMPILE([
1160 #include <linux/smp.h>
1161 ],[
1162 on_each_cpu(NULL, NULL, 0);
1163 ],[
1164 AC_MSG_RESULT(yes)
1165 AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
1166 [on_each_cpu wants 3 args])
1167 ],[
1168 AC_MSG_RESULT(no)
1169 ])
1170])
36b313da
BB		 1171
1172dnl #
d1ff2312
BB		 1173dnl # 2.6.18 API change,
1174dnl # kallsyms_lookup_name no longer exported
1175dnl #
1176AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME], [
1177 SPL_CHECK_SYMBOL_EXPORT(
1178 [kallsyms_lookup_name],
1179 [],
1180 [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1181 [kallsyms_lookup_name() is available])],
1182 [])
1183])
1184
1185dnl #
e11d6c5f
BB		 1186dnl # Proposed API change,
1187dnl # This symbol is not available in stock kernels. You may build a
1188dnl # custom kernel with the *-spl-export-symbols.patch which will export
1189dnl # these symbols for use. If your already rolling a custom kernel for
1190dnl # your environment this is recommended.
d1ff2312
BB		 1191dnl #
1192AC_DEFUN([SPL_AC_GET_VMALLOC_INFO], [
1193 SPL_CHECK_SYMBOL_EXPORT(
1194 [get_vmalloc_info],
1195 [],
1196 [AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
1197 [get_vmalloc_info() is available])],
1198 [])
1199])
1200
5232d256
BB		 1201dnl #
1202dnl # 2.6.17 API change
1203dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
1204dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
1205dnl # were exported in 2.6.17 for use by modules which was consistent with
1206dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
1207dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
1208dnl # were dropped entirely leaving modules no way to directly iterate over
1209dnl # the zone list. Because we need access to the zone helpers we check
1210dnl # if the kernel contains the old or new implementation. Then we check
1211dnl # to see if the symbols we need for each version are available. If they
1212dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
1213dnl #
1214AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
1215 AC_MSG_CHECKING([whether symbol *_pgdat exist])
1216 grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
1217 rc=$?
1218 if test $rc -eq 0; then
1219 AC_MSG_RESULT([yes])
1220 AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
1221 else
1222 AC_MSG_RESULT([no])
1223 fi
1224])
1225
d1ff2312 1226dnl #
e11d6c5f
BB		 1227dnl # Proposed API change,
1228dnl # This symbol is not available in stock kernels. You may build a
1229dnl # custom kernel with the *-spl-export-symbols.patch which will export
1230dnl # these symbols for use. If your already rolling a custom kernel for
1231dnl # your environment this is recommended.
36b313da
BB		 1232dnl #
1233AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT], [
1234 SPL_CHECK_SYMBOL_EXPORT(
1235 [first_online_pgdat],
1236 [],
1237 [AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
1238 [first_online_pgdat() is available])],
1239 [])
1240])
1241
1242dnl #
e11d6c5f
BB		 1243dnl # Proposed API change,
1244dnl # This symbol is not available in stock kernels. You may build a
1245dnl # custom kernel with the *-spl-export-symbols.patch which will export
1246dnl # these symbols for use. If your already rolling a custom kernel for
1247dnl # your environment this is recommended.
36b313da
BB		 1248dnl #
1249AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT], [
1250 SPL_CHECK_SYMBOL_EXPORT(
1251 [next_online_pgdat],
1252 [],
1253 [AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
1254 [next_online_pgdat() is available])],
1255 [])
1256])
1257
1258dnl #
e11d6c5f
BB		 1259dnl # Proposed API change,
1260dnl # This symbol is not available in stock kernels. You may build a
1261dnl # custom kernel with the *-spl-export-symbols.patch which will export
1262dnl # these symbols for use. If your already rolling a custom kernel for
1263dnl # your environment this is recommended.
36b313da
BB		 1264dnl #
1265AC_DEFUN([SPL_AC_NEXT_ZONE], [
1266 SPL_CHECK_SYMBOL_EXPORT(
1267 [next_zone],
1268 [],
1269 [AC_DEFINE(HAVE_NEXT_ZONE, 1,
1270 [next_zone() is available])],
1271 [])
1272])
4ab13d3b 1273
5232d256
BB		 1274dnl #
1275dnl # 2.6.17 API change,
1276dnl # See SPL_AC_PGDAT_HELPERS for details.
1277dnl #
1278AC_DEFUN([SPL_AC_PGDAT_LIST], [
1279 SPL_CHECK_SYMBOL_EXPORT(
1280 [pgdat_list],
1281 [],
1282 [AC_DEFINE(HAVE_PGDAT_LIST, 1,
1283 [pgdat_list is available])],
1284 [])
1285])
1286
96dded38
BB		 1287dnl #
1288dnl # 2.6.18 API change,
1289dnl # First introduced global_page_state() support as an inline.
1290dnl #
1291AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
1292 AC_MSG_CHECKING([whether global_page_state() is available])
1293 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1294 #include <linux/mm.h>
96dded38 1295 ],[
03318641 1296 unsigned long state __attribute__ ((unused));
6ae7fef5 1297 state = global_page_state(0);
96dded38
BB		 1298 ],[
1299 AC_MSG_RESULT(yes)
1300 AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
1301 [global_page_state() is available])
1302 ],[
1303 AC_MSG_RESULT(no)
1304 ])
1305])
1306
e11d6c5f 1307dnl #
6ae7fef5
BB		 1308dnl # 2.6.21 API change (plus subsequent naming convention changes),
1309dnl # Public global zone stats now include a free page count. However
1310dnl # the enumerated names of the counters have changed since this API
1311dnl # was introduced. We need to deduce the corrent name to use. This
1312dnl # replaces the priviate get_zone_counts() interface.
1313dnl #
1314dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
1315dnl # is 2.6.30 as of when this was written.
e11d6c5f 1316dnl #
6ae7fef5
BB		 1317AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
1318 AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
e11d6c5f 1319 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1320 #include <linux/mm.h>
e11d6c5f 1321 ],[
03318641 1322 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5 1323 zsi = NR_FREE_PAGES;
e11d6c5f
BB		 1324 ],[
1325 AC_MSG_RESULT(yes)
6ae7fef5
BB		 1326 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
1327 [Page state NR_FREE_PAGES is available])
e11d6c5f
BB		 1328 ],[
1329 AC_MSG_RESULT(no)
1330 ])
1331])
a093c6a4 1332
6ae7fef5
BB		 1333dnl #
1334dnl # 2.6.21 API change (plus subsequent naming convention changes),
1335dnl # Public global zone stats now include an inactive page count. However
1336dnl # the enumerated names of the counters have changed since this API
1337dnl # was introduced. We need to deduce the corrent name to use. This
1338dnl # replaces the priviate get_zone_counts() interface.
1339dnl #
1340dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
1341dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
1342dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
1343dnl #
1344AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
1345 AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
1346 SPL_LINUX_TRY_COMPILE([
1347 #include <linux/mm.h>
1348 ],[
03318641 1349 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1350 zsi = NR_INACTIVE;
1351 ],[
1352 AC_MSG_RESULT(yes)
1353 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
1354 [Page state NR_INACTIVE is available])
1355 ],[
1356 AC_MSG_RESULT(no)
1357 ])
1358
1359 AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
1360 SPL_LINUX_TRY_COMPILE([
1361 #include <linux/mm.h>
1362 ],[
03318641 1363 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1364 zsi = NR_INACTIVE_ANON;
1365 ],[
1366 AC_MSG_RESULT(yes)
1367 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
1368 [Page state NR_INACTIVE_ANON is available])
1369 ],[
1370 AC_MSG_RESULT(no)
1371 ])
1372
1373 AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
1374 SPL_LINUX_TRY_COMPILE([
1375 #include <linux/mm.h>
1376 ],[
03318641 1377 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1378 zsi = NR_INACTIVE_FILE;
1379 ],[
1380 AC_MSG_RESULT(yes)
1381 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
1382 [Page state NR_INACTIVE_FILE is available])
1383 ],[
1384 AC_MSG_RESULT(no)
1385 ])
1386])
1387
1388dnl #
1389dnl # 2.6.21 API change (plus subsequent naming convention changes),
1390dnl # Public global zone stats now include an active page count. However
1391dnl # the enumerated names of the counters have changed since this API
1392dnl # was introduced. We need to deduce the corrent name to use. This
1393dnl # replaces the priviate get_zone_counts() interface.
1394dnl #
1395dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
1396dnl # anonymous and file active pages. As of 2.6.28 it was split in
1397dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
1398dnl #
1399AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
1400 AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
1401 SPL_LINUX_TRY_COMPILE([
1402 #include <linux/mm.h>
1403 ],[
03318641 1404 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1405 zsi = NR_ACTIVE;
1406 ],[
1407 AC_MSG_RESULT(yes)
1408 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
1409 [Page state NR_ACTIVE is available])
1410 ],[
1411 AC_MSG_RESULT(no)
1412 ])
1413
1414 AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
1415 SPL_LINUX_TRY_COMPILE([
1416 #include <linux/mm.h>
1417 ],[
03318641 1418 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1419 zsi = NR_ACTIVE_ANON;
1420 ],[
1421 AC_MSG_RESULT(yes)
1422 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
1423 [Page state NR_ACTIVE_ANON is available])
1424 ],[
1425 AC_MSG_RESULT(no)
1426 ])
1427
1428 AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
1429 SPL_LINUX_TRY_COMPILE([
1430 #include <linux/mm.h>
1431 ],[
03318641 1432 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1433 zsi = NR_ACTIVE_FILE;
1434 ],[
1435 AC_MSG_RESULT(yes)
1436 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
1437 [Page state NR_ACTIVE_FILE is available])
1438 ],[
1439 AC_MSG_RESULT(no)
1440 ])
1441])
1442
1443dnl #
1444dnl # Proposed API change for legacy kernels.
1445dnl # This symbol is not available in older kernels. For kernels post
1446dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
1447dnl # page state information. This symbol is only used in legacy kernels
1448dnl # any only as a last resort.
1449dnl
1450AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
1451 AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
1452 SPL_LINUX_TRY_COMPILE([
1453 ],[
1454 #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
1455 #error "global_page_state needs NR_FREE_PAGES"
1456 #endif
1457
1458 #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
1459 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
1460 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
1461 #error "global_page_state needs NR_ACTIVE*"
1462 #endif
1463
1464 #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
1465 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
1466 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
1467 #error "global_page_state needs NR_INACTIVE*"
1468 #endif
1469 ],[
1470 AC_MSG_RESULT(no)
1471 ],[
1472 AC_MSG_RESULT(yes)
1473 AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
1474 [get_zone_counts() is needed])
1475
1476 SPL_CHECK_SYMBOL_EXPORT(
1477 [get_zone_counts],
1478 [],
1479 [AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
1480 [get_zone_counts() is available])],
1481 [])
1482 ])
1483])
1484
7119bf70
BB		 1485dnl #
1486dnl # 2.6.27 API change,
1487dnl # The user_path_dir() replaces __user_walk()
1488dnl #
1489AC_DEFUN([SPL_AC_USER_PATH_DIR], [
1490 SPL_CHECK_SYMBOL_EXPORT(
1491 [user_path_at],
1492 [],
1493 [AC_DEFINE(HAVE_USER_PATH_DIR, 1,
1494 [user_path_dir() is available])],
1495 [])
1496])
1497
51a727e9
BB		 1498dnl #
1499dnl # Symbol available in RHEL kernels not in stock kernels.
1500dnl #
1501AC_DEFUN([SPL_AC_SET_FS_PWD], [
1502 SPL_CHECK_SYMBOL_EXPORT(
1503 [set_fs_pwd],
1504 [],
1505 [AC_DEFINE(HAVE_SET_FS_PWD, 1,
1506 [set_fs_pwd() is available])],
1507 [])
1508])
1509
1510dnl #
1511dnl # 2.6.25 API change,
1512dnl # Simplied API by replacing mnt+dentry args with a single path arg.
1513dnl #
1514AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
1515 [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
1516 SPL_LINUX_TRY_COMPILE([
1517 #include <linux/sched.h>
baf2979e 1518 #include <linux/fs_struct.h>
51a727e9
BB		 1519 ],[
1520 set_fs_pwd(NULL, NULL);
1521 ],[
1522 AC_MSG_RESULT(yes)
1523 AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
1524 [set_fs_pwd() wants 2 args])
1525 ],[
1526 AC_MSG_RESULT(no)
1527 ])
1528])
1529
a093c6a4
BB		 1530dnl #
1531dnl # SLES API change, never adopted in mainline,
1532dnl # Third 'struct vfsmount *' argument removed.
1533dnl #
1534AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
1535 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
1536 SPL_LINUX_TRY_COMPILE([
1537 #include <linux/fs.h>
1538 ],[
1539 vfs_unlink(NULL, NULL);
1540 ],[
1541 AC_MSG_RESULT(yes)
1542 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
1543 [vfs_unlink() wants 2 args])
1544 ],[
1545 AC_MSG_RESULT(no)
1546 ])
1547])
1548
1549dnl #
1550dnl # SLES API change, never adopted in mainline,
1551dnl # Third and sixth 'struct vfsmount *' argument removed.
1552dnl #
1553AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
1554 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
1555 SPL_LINUX_TRY_COMPILE([
1556 #include <linux/fs.h>
1557 ],[
1558 vfs_rename(NULL, NULL, NULL, NULL);
1559 ],[
1560 AC_MSG_RESULT(yes)
1561 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
1562 [vfs_rename() wants 4 args])
1563 ],[
1564 AC_MSG_RESULT(no)
1565 ])
1566])
ec7d53e9 1567
9b2048c2
BB		 1568dnl #
1569dnl # 2.6.36 API change,
1570dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
1571dnl # a spinlock_t to improve the fastpath performance.
1572dnl #
1573AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
1574 AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
1575 SPL_LINUX_TRY_COMPILE([
1576 #include <linux/sched.h>
1577 #include <linux/fs_struct.h>
1578 ],[
1579 struct fs_struct fs;
1580 spin_lock_init(&fs.lock);
1581 ],[
1582 AC_MSG_RESULT(yes)
1583 AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
1584 [struct fs_struct uses spinlock_t])
1585 ],[
1586 AC_MSG_RESULT(no)
1587 ])
1588])
1589
ec7d53e9
BB		 1590dnl #
1591dnl # 2.6.29 API change,
1592dnl # check whether 'struct cred' exists
1593dnl #
1594AC_DEFUN([SPL_AC_CRED_STRUCT], [
1595 AC_MSG_CHECKING([whether struct cred exists])
1596 SPL_LINUX_TRY_COMPILE([
1597 #include <linux/cred.h>
1598 ],[
03318641 1599 struct cred *cr __attribute__ ((unused));
ec7d53e9
BB		 1600 cr = NULL;
1601 ],[
1602 AC_MSG_RESULT(yes)
1603 AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
1604 ],[
1605 AC_MSG_RESULT(no)
1606 ])
1607])
1608
1609dnl #
e811949a 1610dnl # Custom SPL patch may export this symbol.
ec7d53e9
BB		 1611dnl #
1612AC_DEFUN([SPL_AC_GROUPS_SEARCH], [
1613 SPL_CHECK_SYMBOL_EXPORT(
1614 [groups_search],
1615 [],
1616 [AC_DEFINE(HAVE_GROUPS_SEARCH, 1,
1617 [groups_search() is available])],
1618 [])
1619])
e811949a
BB		 1620
1621dnl #
1622dnl # 2.6.x API change,
1623dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
1624dnl #
1625AC_DEFUN([SPL_AC_PUT_TASK_STRUCT], [
1626 SPL_CHECK_SYMBOL_EXPORT(
1627 [__put_task_struct],
1628 [],
1629 [AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
1630 [__put_task_struct() is available])],
1631 [])
1632])
3977f837
BB		 1633
1634dnl #
1635dnl # 2.6.32 API change,
1636dnl # Unused 'struct file *' removed from prototype.
1637dnl #
1638AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
1639 AC_MSG_CHECKING([whether proc_handler() wants 5 args])
1640 SPL_LINUX_TRY_COMPILE([
1641 #include <linux/sysctl.h>
1642 ],[
1643 proc_dostring(NULL, 0, NULL, NULL, NULL);
1644 ],[
1645 AC_MSG_RESULT(yes)
1646 AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
1647 [proc_handler() wants 5 args])
1648 ],[
1649 AC_MSG_RESULT(no)
1650 ])
1651])
b868e22f
BB		 1652
1653dnl #
1654dnl # 2.6.x API change,
1655dnl # kvasprintf() function added.
1656dnl #
1657AC_DEFUN([SPL_AC_KVASPRINTF], [
1658 SPL_CHECK_SYMBOL_EXPORT(
1659 [kvasprintf],
1660 [],
1661 [AC_DEFINE(HAVE_KVASPRINTF, 1,
1662 [kvasprintf() is available])],
1663 [])
1664])
f0ff89fc
BB		 1665
1666dnl #
1667dnl # 2.6.35 API change,
1668dnl # Unused 'struct dentry *' removed from prototype.
1669dnl #
1670AC_DEFUN([SPL_AC_3ARGS_FILE_FSYNC], [
1671 AC_MSG_CHECKING([whether file_fsync() wants 3 args])
1672 SPL_LINUX_TRY_COMPILE([
1673 #include <linux/buffer_head.h>
1674 ],[
1675 file_fsync(NULL, NULL, 0);
1676 ],[
1677 AC_MSG_RESULT(yes)
1678 AC_DEFINE(HAVE_3ARGS_FILE_FSYNC, 1,
1679 [file_fsync() wants 3 args])
1680 ],[
1681 AC_MSG_RESULT(no)
1682 ])
1683])
46aa7b39
NB		 1684
1685dnl #
1686dnl # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
1687dnl # Earlier versions of rwsem_is_locked() were inline and had a race
1688dnl # condition. The fixed version is exported as a symbol. The race
1689dnl # condition is fixed by acquiring sem->wait_lock, so we must not
1690dnl # call that version while holding sem->wait_lock.
1691dnl #
1692AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED], [
1693 SPL_CHECK_SYMBOL_EXPORT(
1694 [rwsem_is_locked],
1695 [lib/rwsem-spinlock.c],
1696 [AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
1697 [rwsem_is_locked() acquires sem->wait_lock])],
1698 [])
1699])
914b0631
BB		 1700
1701dnl #
1702dnl # 2.6.37 API compat,
1703dnl # The function invalidate_inodes() is no longer exported by the kernel.
1704dnl # The prototype however is still available which means it is safe
1705dnl # to acquire the symbol's address using spl_kallsyms_lookup_name().
1706dnl #
1707AC_DEFUN([SPL_AC_KERNEL_INVALIDATE_INODES], [
1708 SPL_CHECK_SYMBOL_EXPORT(
1709 [invalidate_inodes],
1710 [],
1711 [AC_DEFINE(HAVE_INVALIDATE_INODES, 1,
1712 [invalidate_inodes() is available])],
1713 [])
1714])
e76f4bf1 1715
9b0f9079
BB		 1716dnl #
1717dnl # 2.6.39 API compat,
1718dnl # The function invalidate_inodes() now take 2 arguments. The second
1719dnl # 'kill_dirty' argument describes how invalidate_inodes() should
1720dnl # handle dirty inodes. Only when set will dirty inodes be discarded,
1721dnl # otherwise they will be handled as busy.
1722dnl #
1723dnl # Unfortunately, we don't have access to the invalidate_inodes()
1724dnl # prototype so it's not easy to check how many arguments it takes.
1725dnl # However, this change was done for the benefit of invalidate_device()
1726dnl # which also added an argument. The invalidate_device() symbol does
1727dnl # exist in the development headers so if it takes two arguments we
1728dnl # can fairly safely infer that invalidate_inodes() takes two arguments
1729dnl # as well. See commit 93b270f76e7ef3b81001576860c2701931cdc78b.
1730dnl #
1731AC_DEFUN([SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES],
1732 [AC_MSG_CHECKING([whether invalidate_inodes() wants 2 args])
1733 SPL_LINUX_TRY_COMPILE([
1734 #include <linux/fs.h>
1735 ],[
1736 return __invalidate_device(NULL, 0);
1737 ],[
1738 AC_MSG_RESULT(yes)
1739 AC_DEFINE(HAVE_2ARGS_INVALIDATE_INODES, 1,
1740 [invalidate_inodes() wants 2 args])
1741 ],[
1742 AC_MSG_RESULT(no)
1743 ])
1744])
1745
e76f4bf1
BB		 1746dnl #
1747dnl # 2.6.xx API compat,
1748dnl # There currently exists no exposed API to partially shrink the dcache.
1749dnl # The expected mechanism to shrink the cache is a registered shrinker
1750dnl # which is called during memory pressure.
1751dnl #
1752AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY], [
1753 SPL_CHECK_SYMBOL_EXPORT(
1754 [shrink_dcache_memory],
1755 [fs/dcache.c],
1756 [AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
1757 [shrink_dcache_memory() is available])],
1758 [])
1759])
1760
1761dnl #
1762dnl # 2.6.xx API compat,
1763dnl # There currently exists no exposed API to partially shrink the icache.
1764dnl # The expected mechanism to shrink the cache is a registered shrinker
1765dnl # which is called during memory pressure.
1766dnl #
1767AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY], [
1768 SPL_CHECK_SYMBOL_EXPORT(
1769 [shrink_icache_memory],
1770 [fs/inode.c],
1771 [AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
1772 [shrink_icache_memory() is available])],
1773 [])
1774])
b1cbc461
BB		 1775
1776dnl #
1777dnl # 2.6.39 API compat,
1778dnl # The path_lookup() function has been renamed to kern_path_parent()
1779dnl # and the flags argument has been removed. The only behavior now
1780dnl # offered is that of LOOKUP_PARENT. The spl already always passed
1781dnl # this flag so dropping the flag does not impact us.
1782dnl #
1783AC_DEFUN([SPL_AC_KERN_PATH_PARENT], [
1784 SPL_CHECK_SYMBOL_EXPORT(
1785 [kern_path_parent],
1786 [fs/namei.c],
1787 [AC_DEFINE(HAVE_KERN_PATH_PARENT, 1,
1788 [kern_path_parent() is available])],
1789 [])
1790])
3dfc591a
BB		 1791
1792dnl #
1793dnl # 2.6.39 API compat,
1794dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
1795dnl # This was done to avoid always having to allocate the maximum size
1796dnl # workspace (268K). The caller can now specific the windowBits and
1797dnl # memLevel compression parameters to get a smaller workspace.
1798dnl #
1799AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
1800 [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
1801 SPL_LINUX_TRY_COMPILE([
1802 #include <linux/zlib.h>
1803 ],[
1804 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
1805 ],[
1806 AC_MSG_RESULT(yes)
1807 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
1808 [zlib_deflate_workspacesize() wants 2 args])
1809 ],[
1810 AC_MSG_RESULT(no)
1811 ])
1812])
mirror of SPL module used by << 0.8.x ZFSOnLinux