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Fix NULL deref in balance_pgdat()
[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
86fd39f3 51 SPL_AC_MUTEX_OWNER_TASK_STRUCT
86933a6e 52 SPL_AC_MUTEX_LOCK_NESTED
86933a6e
BB		 53 SPL_AC_3ARGS_ON_EACH_CPU
54 SPL_AC_KALLSYMS_LOOKUP_NAME
55 SPL_AC_GET_VMALLOC_INFO
56 SPL_AC_PGDAT_HELPERS
57 SPL_AC_FIRST_ONLINE_PGDAT
58 SPL_AC_NEXT_ONLINE_PGDAT
59 SPL_AC_NEXT_ZONE
60 SPL_AC_PGDAT_LIST
86933a6e 61 SPL_AC_GLOBAL_PAGE_STATE
6ae7fef5
BB		 62 SPL_AC_ZONE_STAT_ITEM_FREE
63 SPL_AC_ZONE_STAT_ITEM_INACTIVE
64 SPL_AC_ZONE_STAT_ITEM_ACTIVE
65 SPL_AC_GET_ZONE_COUNTS
7119bf70 66 SPL_AC_USER_PATH_DIR
51a727e9
BB		 67 SPL_AC_SET_FS_PWD
68 SPL_AC_2ARGS_SET_FS_PWD
86933a6e
BB		 69 SPL_AC_2ARGS_VFS_UNLINK
70 SPL_AC_4ARGS_VFS_RENAME
9b2048c2 71 SPL_AC_FS_STRUCT_SPINLOCK
ec7d53e9
BB		 72 SPL_AC_CRED_STRUCT
73 SPL_AC_GROUPS_SEARCH
e811949a 74 SPL_AC_PUT_TASK_STRUCT
3977f837 75 SPL_AC_5ARGS_PROC_HANDLER
b868e22f 76 SPL_AC_KVASPRINTF
f0ff89fc 77 SPL_AC_3ARGS_FILE_FSYNC
46aa7b39 78 SPL_AC_EXPORTED_RWSEM_IS_LOCKED
914b0631 79 SPL_AC_KERNEL_INVALIDATE_INODES
9b0f9079 80 SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
e76f4bf1
BB		 81 SPL_AC_SHRINK_DCACHE_MEMORY
82 SPL_AC_SHRINK_ICACHE_MEMORY
b1cbc461 83 SPL_AC_KERN_PATH_PARENT
3dfc591a 84 SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
a55bcaad 85 SPL_AC_SHRINK_CONTROL_STRUCT
86933a6e
BB		 86])
87
88AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
bb339d06 89 modpost=$LINUX/scripts/Makefile.modpost
86933a6e 90 AC_MSG_CHECKING([kernel file name for module symbols])
bb339d06
BB		 91 if test -f "$modpost"; then
92 if grep -q Modules.symvers $modpost; then
93 LINUX_SYMBOLS=Modules.symvers
94 else
95 LINUX_SYMBOLS=Module.symvers
96 fi
912fd84d
BB		 97
98 if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
99 AC_MSG_ERROR([
100 *** Please make sure the kernel devel package for your distribution
101 *** is installed. If your building with a custom kernel make sure the
102 *** kernel is configured, built, and the '--with-linux=PATH' configure
103 *** option refers to the location of the kernel source.])
104 fi
86933a6e 105 else
bb339d06 106 LINUX_SYMBOLS=NONE
86933a6e
BB		 107 fi
108 AC_MSG_RESULT($LINUX_SYMBOLS)
109 AC_SUBST(LINUX_SYMBOLS)
110])
111
57d86234 112AC_DEFUN([SPL_AC_KERNEL], [
57d86234 113 AC_ARG_WITH([linux],
114 AS_HELP_STRING([--with-linux=PATH],
115 [Path to kernel source]),
39a3d2a4 116 [kernelsrc="$withval"])
57d86234 117
118 AC_ARG_WITH([linux-obj],
119 AS_HELP_STRING([--with-linux-obj=PATH],
120 [Path to kernel build objects]),
121 [kernelbuild="$withval"])
122
123 AC_MSG_CHECKING([kernel source directory])
124 if test -z "$kernelsrc"; then
22ccfaa8
BB		 125 if test -e "/lib/modules/$(uname -r)/source"; then
126 headersdir="/lib/modules/$(uname -r)/source"
127 sourcelink=$(readlink -f "$headersdir")
128 elif test -e "/lib/modules/$(uname -r)/build"; then
129 headersdir="/lib/modules/$(uname -r)/build"
534c4e38
BM		 130 sourcelink=$(readlink -f "$headersdir")
131 else
132 sourcelink=$(ls -1d /usr/src/kernels/* \
133 /usr/src/linux-* \
134 2>/dev/null | grep -v obj | tail -1)
135 fi
57d86234 136
8fd4e3af 137 if test -n "$sourcelink" && test -e ${sourcelink}; then
d4326403 138 kernelsrc=`readlink -f ${sourcelink}`
d4326403 139 else
57d86234 140 AC_MSG_RESULT([Not found])
141 AC_MSG_ERROR([
8fd4e3af
BB		 142 *** Please make sure the kernel devel package for your distribution
143 *** is installed then try again. If that fails you can specify the
144 *** location of the kernel source with the '--with-linux=PATH' option.])
57d86234 145 fi
c5f70460
BB		 146 else
147 if test "$kernelsrc" = "NONE"; then
148 kernsrcver=NONE
149 fi
57d86234 150 fi
151
152 AC_MSG_RESULT([$kernelsrc])
153 AC_MSG_CHECKING([kernel build directory])
39a3d2a4 154 if test -z "$kernelbuild"; then
22ccfaa8
BB		 155 if test -e "/lib/modules/$(uname -r)/build"; then
156 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
157 elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
e2d28a37
BB		 158 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
159 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
160 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
161 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
162 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
39a3d2a4
BB		 163 else
164 kernelbuild=${kernelsrc}
165 fi
bf338d8d 166 fi
57d86234 167 AC_MSG_RESULT([$kernelbuild])
168
169 AC_MSG_CHECKING([kernel source version])
fd921c2e
BB		 170 utsrelease1=$kernelbuild/include/linux/version.h
171 utsrelease2=$kernelbuild/include/linux/utsrelease.h
172 utsrelease3=$kernelbuild/include/generated/utsrelease.h
173 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
174 utsrelease=linux/version.h
175 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
176 utsrelease=linux/utsrelease.h
177 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
178 utsrelease=generated/utsrelease.h
179 fi
57d86234 180
fd921c2e
BB		 181 if test "$utsrelease"; then
182 kernsrcver=`(echo "#include <$utsrelease>";
57d86234 183 echo "kernsrcver=UTS_RELEASE") |
d4326403 184 cpp -I $kernelbuild/include |
57d86234 185 grep "^kernsrcver=" | cut -d \" -f 2`
57d86234 186
fd921c2e
BB		 187 if test -z "$kernsrcver"; then
188 AC_MSG_RESULT([Not found])
189 AC_MSG_ERROR([*** Cannot determine kernel version.])
190 fi
191 else
57d86234 192 AC_MSG_RESULT([Not found])
fd921c2e 193 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
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
7731d46b
BB		 209AC_DEFUN([SPL_AC_KERNEL_CONFIG], [
210 SPL_LINUX_CONFIG([PREEMPT],
211 AC_MSG_ERROR([
212 *** Kernel built with CONFIG_PREEMPT which is not supported.
213 ** You must rebuild your kernel without this option.]), [])
214])
215
287b2fb1
BB		 216dnl #
217dnl # Default SPL user configuration
218dnl #
ad35b6a6 219AC_DEFUN([SPL_AC_CONFIG_USER], [])
287b2fb1
BB		 220
221dnl #
222dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
223dnl # are missing it is non-fatal but you will not be able to build
224dnl # RPM packages and will be warned if you try too.
225dnl #
226AC_DEFUN([SPL_AC_RPM], [
227 RPM=rpm
228 RPMBUILD=rpmbuild
229
230 AC_MSG_CHECKING([whether $RPM is available])
231 AS_IF([tmp=$($RPM --version 2>/dev/null)], [
232 RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
233 HAVE_RPM=yes
234 AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
235 ],[
236 HAVE_RPM=no
237 AC_MSG_RESULT([$HAVE_RPM])
238 ])
239
240 AC_MSG_CHECKING([whether $RPMBUILD is available])
241 AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
242 RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
243 HAVE_RPMBUILD=yes
244 AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
245 ],[
246 HAVE_RPMBUILD=no
247 AC_MSG_RESULT([$HAVE_RPMBUILD])
248 ])
249
250 AC_SUBST(HAVE_RPM)
251 AC_SUBST(RPM)
252 AC_SUBST(RPM_VERSION)
253
254 AC_SUBST(HAVE_RPMBUILD)
255 AC_SUBST(RPMBUILD)
256 AC_SUBST(RPMBUILD_VERSION)
257])
258
259dnl #
260dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
261dnl # tools are missing it is non-fatal but you will not be able to build
262dnl # DEB packages and will be warned if you try too.
263dnl #
264AC_DEFUN([SPL_AC_DPKG], [
265 DPKG=dpkg
266 DPKGBUILD=dpkg-buildpackage
267
268 AC_MSG_CHECKING([whether $DPKG is available])
269 AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
270 DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
271 HAVE_DPKG=yes
272 AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
273 ],[
274 HAVE_DPKG=no
275 AC_MSG_RESULT([$HAVE_DPKG])
276 ])
277
278 AC_MSG_CHECKING([whether $DPKGBUILD is available])
279 AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
280 DPKGBUILD_VERSION=$(echo $tmp | \
281 $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
282 HAVE_DPKGBUILD=yes
283 AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
284 ],[
285 HAVE_DPKGBUILD=no
286 AC_MSG_RESULT([$HAVE_DPKGBUILD])
287 ])
288
289 AC_SUBST(HAVE_DPKG)
290 AC_SUBST(DPKG)
291 AC_SUBST(DPKG_VERSION)
292
293 AC_SUBST(HAVE_DPKGBUILD)
294 AC_SUBST(DPKGBUILD)
295 AC_SUBST(DPKGBUILD_VERSION)
296])
297
298dnl #
299dnl # Until native packaging for various different packing systems
300dnl # can be added the least we can do is attempt to use alien to
301dnl # convert the RPM packages to the needed package type. This is
302dnl # a hack but so far it has worked reasonable well.
303dnl #
304AC_DEFUN([SPL_AC_ALIEN], [
305 ALIEN=alien
306
307 AC_MSG_CHECKING([whether $ALIEN is available])
308 AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
309 ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
310 HAVE_ALIEN=yes
311 AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
312 ],[
313 HAVE_ALIEN=no
314 AC_MSG_RESULT([$HAVE_ALIEN])
315 ])
316
317 AC_SUBST(HAVE_ALIEN)
318 AC_SUBST(ALIEN)
319 AC_SUBST(ALIEN_VERSION)
320])
321
322dnl #
323dnl # Using the VENDOR tag from config.guess set the default
324dnl # package type for 'make pkg': (rpm | deb | tgz)
325dnl #
326AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
73fc084e
BB		 327 AC_MSG_CHECKING([linux distribution])
328 if test -f /etc/redhat-release ; then
329 VENDOR=redhat ;
330 elif test -f /etc/fedora-release ; then
331 VENDOR=fedora ;
332 elif test -f /etc/lsb-release ; then
333 VENDOR=ubuntu ;
334 elif test -f /etc/debian_version ; then
335 VENDOR=debian ;
336 elif test -f /etc/SuSE-release ; then
337 VENDOR=sles ;
338 elif test -f /etc/slackware-version ; then
339 VENDOR=slackware ;
340 elif test -f /etc/gentoo-release ; then
341 VENDOR=gentoo ;
342 else
343 VENDOR= ;
344 fi
345 AC_MSG_RESULT([$VENDOR])
346 AC_SUBST(VENDOR)
287b2fb1
BB		 347
348 AC_MSG_CHECKING([default package type])
349 case "$VENDOR" in
350 fedora) DEFAULT_PACKAGE=rpm ;;
351 redhat) DEFAULT_PACKAGE=rpm ;;
352 sles) DEFAULT_PACKAGE=rpm ;;
353 ubuntu) DEFAULT_PACKAGE=deb ;;
354 debian) DEFAULT_PACKAGE=deb ;;
355 slackware) DEFAULT_PACKAGE=tgz ;;
356 *) DEFAULT_PACKAGE=rpm ;;
357 esac
358
359 AC_MSG_RESULT([$DEFAULT_PACKAGE])
360 AC_SUBST(DEFAULT_PACKAGE)
361])
362
363dnl #
364dnl # Default SPL user configuration
365dnl #
366AC_DEFUN([SPL_AC_PACKAGE], [
367 SPL_AC_RPM
368 SPL_AC_DPKG
369 SPL_AC_ALIEN
370 SPL_AC_DEFAULT_PACKAGE
371])
372
6a1c3d41 373AC_DEFUN([SPL_AC_LICENSE], [
86933a6e
BB		 374 AC_MSG_CHECKING([spl license])
375 LICENSE=GPL
376 AC_MSG_RESULT([$LICENSE])
6a1c3d41 377 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
86933a6e
BB		 378 AC_SUBST(LICENSE)
379])
380
381AC_DEFUN([SPL_AC_CONFIG], [
382 SPL_CONFIG=all
383 AC_ARG_WITH([config],
384 AS_HELP_STRING([--with-config=CONFIG],
c1541dfe 385 [Config file 'kernel|user|all|srpm']),
86933a6e
BB		 386 [SPL_CONFIG="$withval"])
387
388 AC_MSG_CHECKING([spl config])
389 AC_MSG_RESULT([$SPL_CONFIG]);
390 AC_SUBST(SPL_CONFIG)
391
392 case "$SPL_CONFIG" in
393 kernel) SPL_AC_CONFIG_KERNEL ;;
394 user) SPL_AC_CONFIG_USER ;;
395 all) SPL_AC_CONFIG_KERNEL
396 SPL_AC_CONFIG_USER ;;
c1541dfe 397 srpm) ;;
86933a6e
BB		 398 *)
399 AC_MSG_RESULT([Error!])
400 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
c1541dfe 401 user kernel|user|all|srpm]) ;;
86933a6e
BB		 402 esac
403
404 AM_CONDITIONAL([CONFIG_USER],
405 [test "$SPL_CONFIG" = user] ||
406 [test "$SPL_CONFIG" = all])
407 AM_CONDITIONAL([CONFIG_KERNEL],
408 [test "$SPL_CONFIG" = kernel] ||
409 [test "$SPL_CONFIG" = all])
6a1c3d41 410])
411
055ffd98
BB		 412dnl #
413dnl # Enable if the SPL should be compiled with internal debugging enabled.
414dnl # By default this support is disabled.
415dnl #
57d86234 416AC_DEFUN([SPL_AC_DEBUG], [
c950d148 417 AC_MSG_CHECKING([whether debugging is enabled])
055ffd98
BB		 418 AC_ARG_ENABLE([debug],
419 [AS_HELP_STRING([--enable-debug],
420 [Enable generic debug support @<:@default=no@:>@])],
421 [],
422 [enable_debug=no])
423
424 AS_IF([test "x$enable_debug" = xyes],
c950d148 425 [
c950d148
BB		 426 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
427 DEBUG_CFLAGS="-DDEBUG -Werror"
428 ],
429 [
c950d148
BB		 430 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
431 DEBUG_CFLAGS="-DNDEBUG"
432 ])
055ffd98 433
c950d148 434 AC_SUBST(DEBUG_CFLAGS)
055ffd98 435 AC_MSG_RESULT([$enable_debug])
57d86234 436])
437
055ffd98
BB		 438dnl #
439dnl # Enabled by default it provides a minimal level of memory tracking.
440dnl # A total count of bytes allocated is kept for each alloc and free.
441dnl # Then at module unload time a report to the console will be printed
442dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
443dnl # and provide an easy way to inspect the kmem based slab.
444dnl #
57d86234 445AC_DEFUN([SPL_AC_DEBUG_KMEM], [
055ffd98
BB		 446 AC_ARG_ENABLE([debug-kmem],
447 [AS_HELP_STRING([--enable-debug-kmem],
448 [Enable basic kmem accounting @<:@default=yes@:>@])],
449 [],
450 [enable_debug_kmem=yes])
57d86234 451
055ffd98
BB		 452 AS_IF([test "x$enable_debug_kmem" = xyes],
453 [AC_DEFINE([DEBUG_KMEM], [1],
454 [Define to 1 to enable basic kmem accounting])
455 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"])
456
457 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
458 AC_MSG_RESULT([$enable_debug_kmem])
57d86234 459])
460
055ffd98
BB		 461dnl #
462dnl # Disabled by default it provides detailed memory tracking. This
463dnl # feature also requires --enable-debug-kmem to be set. When enabled
464dnl # not only will total bytes be tracked but also the location of every
465dnl # alloc and free. When the SPL module is unloaded a list of all leaked
466dnl # addresses and where they were allocated will be dumped to the console.
467dnl # Enabling this feature has a significant impact on performance but it
468dnl # makes finding memory leaks pretty straight forward.
469dnl #
470AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
471 AC_ARG_ENABLE([debug-kmem-tracking],
472 [AS_HELP_STRING([--enable-debug-kmem-tracking],
473 [Enable detailed kmem tracking @<:@default=no@:>@])],
474 [],
475 [enable_debug_kmem_tracking=no])
476
477 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
478 [AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
479 [Define to 1 to enable detailed kmem tracking])
480 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"])
481
482 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
483 AC_MSG_RESULT([$enable_debug_kmem_tracking])
57d86234 484])
485
486dnl #
487dnl # SPL_LINUX_CONFTEST
488dnl #
489AC_DEFUN([SPL_LINUX_CONFTEST], [
dbe561d8 490cat confdefs.h - <<_ACEOF >conftest.c
57d86234 491$1
492_ACEOF
493])
494
495dnl #
496dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
497dnl #
498m4_define([SPL_LANG_PROGRAM], [
499$1
500int
501main (void)
502{
503dnl Do *not* indent the following line: there may be CPP directives.
504dnl Don't move the `;' right after for the same reason.
505$2
506 ;
507 return 0;
508}
509])
510
511dnl #
512dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
513dnl #
514AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
c5f70460
BB		 515 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
516 rm -Rf build && mkdir -p build
517 echo "obj-m := conftest.o" >build/Makefile
518 AS_IF(
3d0cb2d3 519 [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		 520 [$4],
521 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
522 )
523 rm -Rf build
57d86234 524])
525
526dnl #
527dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
528dnl #
529AC_DEFUN([SPL_LINUX_TRY_COMPILE],
530 [SPL_LINUX_COMPILE_IFELSE(
d50bd9e2 531 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
532 [modules],
533 [test -s build/conftest.o],
534 [$3], [$4])
57d86234 535])
536
537dnl #
538dnl # SPL_LINUX_CONFIG
539dnl #
540AC_DEFUN([SPL_LINUX_CONFIG],
541 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
542 SPL_LINUX_TRY_COMPILE([
c064bdee 543 #include <linux/module.h>
57d86234 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
86fd39f3
BB		 1130dnl #
1131dnl # 2.6.39 API change,
1132dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
1133dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
1134dnl # was defined. As of 2.6.39 this was changed to a task_struct
1135dnl # pointer which frankly makes a lot more sense.
1136dnl #
1137AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
1138 AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
1139 tmp_flags="$EXTRA_KCFLAGS"
1140 EXTRA_KCFLAGS="-Werror"
1141 SPL_LINUX_TRY_COMPILE([
1142 #include <linux/mutex.h>
1143 ],[
1144 struct mutex mtx __attribute__ ((unused));
1145 mtx.owner = current;
1146 ],[
1147 AC_MSG_RESULT(yes)
1148 AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
1149 [struct mutex owner is a task_struct])
1150 ],[
1151 AC_MSG_RESULT(no)
1152 ])
1153 EXTRA_KCFLAGS="$tmp_flags"
1154])
1155
6c9433c1
BB		 1156dnl #
1157dnl # 2.6.18 API change,
1158dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
1159dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
1160dnl # if the mutex validator is disabled or otherwise unavailable.
1161dnl #
1162AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
1163 AC_MSG_CHECKING([whether mutex_lock_nested() is available])
1164 SPL_LINUX_TRY_COMPILE([
1165 #include <linux/mutex.h>
1166 ],[
1167 struct mutex mutex;
1168 mutex_init(&mutex);
1169 mutex_lock_nested(&mutex, 0);
1170 ],[
1171 AC_MSG_RESULT(yes)
1172 AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
1173 [mutex_lock_nested() is available])
1174 ],[
1175 AC_MSG_RESULT(no)
1176 ])
1177])
1178
31a033ec
BB		 1179dnl #
1180dnl # 2.6.27 API change,
1181dnl # on_each_cpu() uses 3 args, no 'retry' argument
1182dnl #
1183AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
1184 AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
1185 SPL_LINUX_TRY_COMPILE([
1186 #include <linux/smp.h>
1187 ],[
1188 on_each_cpu(NULL, NULL, 0);
1189 ],[
1190 AC_MSG_RESULT(yes)
1191 AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
1192 [on_each_cpu wants 3 args])
1193 ],[
1194 AC_MSG_RESULT(no)
1195 ])
1196])
36b313da
BB		 1197
1198dnl #
d1ff2312
BB		 1199dnl # 2.6.18 API change,
1200dnl # kallsyms_lookup_name no longer exported
1201dnl #
1202AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME], [
1203 SPL_CHECK_SYMBOL_EXPORT(
1204 [kallsyms_lookup_name],
1205 [],
1206 [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1207 [kallsyms_lookup_name() is available])],
1208 [])
1209])
1210
1211dnl #
e11d6c5f
BB		 1212dnl # Proposed API change,
1213dnl # This symbol is not available in stock kernels. You may build a
1214dnl # custom kernel with the *-spl-export-symbols.patch which will export
1215dnl # these symbols for use. If your already rolling a custom kernel for
1216dnl # your environment this is recommended.
d1ff2312
BB		 1217dnl #
1218AC_DEFUN([SPL_AC_GET_VMALLOC_INFO], [
1219 SPL_CHECK_SYMBOL_EXPORT(
1220 [get_vmalloc_info],
1221 [],
1222 [AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
1223 [get_vmalloc_info() is available])],
1224 [])
1225])
1226
5232d256
BB		 1227dnl #
1228dnl # 2.6.17 API change
1229dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
1230dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
1231dnl # were exported in 2.6.17 for use by modules which was consistent with
1232dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
1233dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
1234dnl # were dropped entirely leaving modules no way to directly iterate over
1235dnl # the zone list. Because we need access to the zone helpers we check
1236dnl # if the kernel contains the old or new implementation. Then we check
1237dnl # to see if the symbols we need for each version are available. If they
1238dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
1239dnl #
1240AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
1241 AC_MSG_CHECKING([whether symbol *_pgdat exist])
1242 grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
1243 rc=$?
1244 if test $rc -eq 0; then
1245 AC_MSG_RESULT([yes])
1246 AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
1247 else
1248 AC_MSG_RESULT([no])
1249 fi
1250])
1251
d1ff2312 1252dnl #
e11d6c5f
BB		 1253dnl # Proposed API change,
1254dnl # This symbol is not available in stock kernels. You may build a
1255dnl # custom kernel with the *-spl-export-symbols.patch which will export
1256dnl # these symbols for use. If your already rolling a custom kernel for
1257dnl # your environment this is recommended.
36b313da
BB		 1258dnl #
1259AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT], [
1260 SPL_CHECK_SYMBOL_EXPORT(
1261 [first_online_pgdat],
1262 [],
1263 [AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
1264 [first_online_pgdat() is available])],
1265 [])
1266])
1267
1268dnl #
e11d6c5f
BB		 1269dnl # Proposed API change,
1270dnl # This symbol is not available in stock kernels. You may build a
1271dnl # custom kernel with the *-spl-export-symbols.patch which will export
1272dnl # these symbols for use. If your already rolling a custom kernel for
1273dnl # your environment this is recommended.
36b313da
BB		 1274dnl #
1275AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT], [
1276 SPL_CHECK_SYMBOL_EXPORT(
1277 [next_online_pgdat],
1278 [],
1279 [AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
1280 [next_online_pgdat() is available])],
1281 [])
1282])
1283
1284dnl #
e11d6c5f
BB		 1285dnl # Proposed API change,
1286dnl # This symbol is not available in stock kernels. You may build a
1287dnl # custom kernel with the *-spl-export-symbols.patch which will export
1288dnl # these symbols for use. If your already rolling a custom kernel for
1289dnl # your environment this is recommended.
36b313da
BB		 1290dnl #
1291AC_DEFUN([SPL_AC_NEXT_ZONE], [
1292 SPL_CHECK_SYMBOL_EXPORT(
1293 [next_zone],
1294 [],
1295 [AC_DEFINE(HAVE_NEXT_ZONE, 1,
1296 [next_zone() is available])],
1297 [])
1298])
4ab13d3b 1299
5232d256
BB		 1300dnl #
1301dnl # 2.6.17 API change,
1302dnl # See SPL_AC_PGDAT_HELPERS for details.
1303dnl #
1304AC_DEFUN([SPL_AC_PGDAT_LIST], [
1305 SPL_CHECK_SYMBOL_EXPORT(
1306 [pgdat_list],
1307 [],
1308 [AC_DEFINE(HAVE_PGDAT_LIST, 1,
1309 [pgdat_list is available])],
1310 [])
1311])
1312
96dded38
BB		 1313dnl #
1314dnl # 2.6.18 API change,
1315dnl # First introduced global_page_state() support as an inline.
1316dnl #
1317AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
1318 AC_MSG_CHECKING([whether global_page_state() is available])
1319 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1320 #include <linux/mm.h>
96dded38 1321 ],[
03318641 1322 unsigned long state __attribute__ ((unused));
6ae7fef5 1323 state = global_page_state(0);
96dded38
BB		 1324 ],[
1325 AC_MSG_RESULT(yes)
1326 AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
1327 [global_page_state() is available])
1328 ],[
1329 AC_MSG_RESULT(no)
1330 ])
1331])
1332
e11d6c5f 1333dnl #
6ae7fef5
BB		 1334dnl # 2.6.21 API change (plus subsequent naming convention changes),
1335dnl # Public global zone stats now include a free 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_FREE_PAGES was available from 2.6.21 to current kernels, which
1341dnl # is 2.6.30 as of when this was written.
e11d6c5f 1342dnl #
6ae7fef5
BB		 1343AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
1344 AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
e11d6c5f 1345 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1346 #include <linux/mm.h>
e11d6c5f 1347 ],[
03318641 1348 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5 1349 zsi = NR_FREE_PAGES;
e11d6c5f
BB		 1350 ],[
1351 AC_MSG_RESULT(yes)
6ae7fef5
BB		 1352 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
1353 [Page state NR_FREE_PAGES is available])
e11d6c5f
BB		 1354 ],[
1355 AC_MSG_RESULT(no)
1356 ])
1357])
a093c6a4 1358
6ae7fef5
BB		 1359dnl #
1360dnl # 2.6.21 API change (plus subsequent naming convention changes),
1361dnl # Public global zone stats now include an inactive page count. However
1362dnl # the enumerated names of the counters have changed since this API
1363dnl # was introduced. We need to deduce the corrent name to use. This
1364dnl # replaces the priviate get_zone_counts() interface.
1365dnl #
1366dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
1367dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
1368dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
1369dnl #
1370AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
1371 AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
1372 SPL_LINUX_TRY_COMPILE([
1373 #include <linux/mm.h>
1374 ],[
03318641 1375 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1376 zsi = NR_INACTIVE;
1377 ],[
1378 AC_MSG_RESULT(yes)
1379 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
1380 [Page state NR_INACTIVE is available])
1381 ],[
1382 AC_MSG_RESULT(no)
1383 ])
1384
1385 AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
1386 SPL_LINUX_TRY_COMPILE([
1387 #include <linux/mm.h>
1388 ],[
03318641 1389 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1390 zsi = NR_INACTIVE_ANON;
1391 ],[
1392 AC_MSG_RESULT(yes)
1393 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
1394 [Page state NR_INACTIVE_ANON is available])
1395 ],[
1396 AC_MSG_RESULT(no)
1397 ])
1398
1399 AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
1400 SPL_LINUX_TRY_COMPILE([
1401 #include <linux/mm.h>
1402 ],[
03318641 1403 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1404 zsi = NR_INACTIVE_FILE;
1405 ],[
1406 AC_MSG_RESULT(yes)
1407 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
1408 [Page state NR_INACTIVE_FILE is available])
1409 ],[
1410 AC_MSG_RESULT(no)
1411 ])
1412])
1413
1414dnl #
1415dnl # 2.6.21 API change (plus subsequent naming convention changes),
1416dnl # Public global zone stats now include an active page count. However
1417dnl # the enumerated names of the counters have changed since this API
1418dnl # was introduced. We need to deduce the corrent name to use. This
1419dnl # replaces the priviate get_zone_counts() interface.
1420dnl #
1421dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
1422dnl # anonymous and file active pages. As of 2.6.28 it was split in
1423dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
1424dnl #
1425AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
1426 AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
1427 SPL_LINUX_TRY_COMPILE([
1428 #include <linux/mm.h>
1429 ],[
03318641 1430 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1431 zsi = NR_ACTIVE;
1432 ],[
1433 AC_MSG_RESULT(yes)
1434 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
1435 [Page state NR_ACTIVE is available])
1436 ],[
1437 AC_MSG_RESULT(no)
1438 ])
1439
1440 AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
1441 SPL_LINUX_TRY_COMPILE([
1442 #include <linux/mm.h>
1443 ],[
03318641 1444 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1445 zsi = NR_ACTIVE_ANON;
1446 ],[
1447 AC_MSG_RESULT(yes)
1448 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
1449 [Page state NR_ACTIVE_ANON is available])
1450 ],[
1451 AC_MSG_RESULT(no)
1452 ])
1453
1454 AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
1455 SPL_LINUX_TRY_COMPILE([
1456 #include <linux/mm.h>
1457 ],[
03318641 1458 enum zone_stat_item zsi __attribute__ ((unused));
6ae7fef5
BB		 1459 zsi = NR_ACTIVE_FILE;
1460 ],[
1461 AC_MSG_RESULT(yes)
1462 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
1463 [Page state NR_ACTIVE_FILE is available])
1464 ],[
1465 AC_MSG_RESULT(no)
1466 ])
1467])
1468
1469dnl #
1470dnl # Proposed API change for legacy kernels.
1471dnl # This symbol is not available in older kernels. For kernels post
1472dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
1473dnl # page state information. This symbol is only used in legacy kernels
1474dnl # any only as a last resort.
1475dnl
1476AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
1477 AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
1478 SPL_LINUX_TRY_COMPILE([
1479 ],[
1480 #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
1481 #error "global_page_state needs NR_FREE_PAGES"
1482 #endif
1483
1484 #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
1485 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
1486 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
1487 #error "global_page_state needs NR_ACTIVE*"
1488 #endif
1489
1490 #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
1491 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
1492 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
1493 #error "global_page_state needs NR_INACTIVE*"
1494 #endif
1495 ],[
1496 AC_MSG_RESULT(no)
1497 ],[
1498 AC_MSG_RESULT(yes)
1499 AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
1500 [get_zone_counts() is needed])
1501
1502 SPL_CHECK_SYMBOL_EXPORT(
1503 [get_zone_counts],
1504 [],
1505 [AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
1506 [get_zone_counts() is available])],
1507 [])
1508 ])
1509])
1510
7119bf70
BB		 1511dnl #
1512dnl # 2.6.27 API change,
1513dnl # The user_path_dir() replaces __user_walk()
1514dnl #
1515AC_DEFUN([SPL_AC_USER_PATH_DIR], [
1516 SPL_CHECK_SYMBOL_EXPORT(
1517 [user_path_at],
1518 [],
1519 [AC_DEFINE(HAVE_USER_PATH_DIR, 1,
1520 [user_path_dir() is available])],
1521 [])
1522])
1523
51a727e9
BB		 1524dnl #
1525dnl # Symbol available in RHEL kernels not in stock kernels.
1526dnl #
1527AC_DEFUN([SPL_AC_SET_FS_PWD], [
1528 SPL_CHECK_SYMBOL_EXPORT(
1529 [set_fs_pwd],
1530 [],
1531 [AC_DEFINE(HAVE_SET_FS_PWD, 1,
1532 [set_fs_pwd() is available])],
1533 [])
1534])
1535
1536dnl #
1537dnl # 2.6.25 API change,
1538dnl # Simplied API by replacing mnt+dentry args with a single path arg.
1539dnl #
1540AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
1541 [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
1542 SPL_LINUX_TRY_COMPILE([
1543 #include <linux/sched.h>
baf2979e 1544 #include <linux/fs_struct.h>
51a727e9
BB		 1545 ],[
1546 set_fs_pwd(NULL, NULL);
1547 ],[
1548 AC_MSG_RESULT(yes)
1549 AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
1550 [set_fs_pwd() wants 2 args])
1551 ],[
1552 AC_MSG_RESULT(no)
1553 ])
1554])
1555
a093c6a4
BB		 1556dnl #
1557dnl # SLES API change, never adopted in mainline,
1558dnl # Third 'struct vfsmount *' argument removed.
1559dnl #
1560AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
1561 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
1562 SPL_LINUX_TRY_COMPILE([
1563 #include <linux/fs.h>
1564 ],[
1565 vfs_unlink(NULL, NULL);
1566 ],[
1567 AC_MSG_RESULT(yes)
1568 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
1569 [vfs_unlink() wants 2 args])
1570 ],[
1571 AC_MSG_RESULT(no)
1572 ])
1573])
1574
1575dnl #
1576dnl # SLES API change, never adopted in mainline,
1577dnl # Third and sixth 'struct vfsmount *' argument removed.
1578dnl #
1579AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
1580 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
1581 SPL_LINUX_TRY_COMPILE([
1582 #include <linux/fs.h>
1583 ],[
1584 vfs_rename(NULL, NULL, NULL, NULL);
1585 ],[
1586 AC_MSG_RESULT(yes)
1587 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
1588 [vfs_rename() wants 4 args])
1589 ],[
1590 AC_MSG_RESULT(no)
1591 ])
1592])
ec7d53e9 1593
9b2048c2
BB		 1594dnl #
1595dnl # 2.6.36 API change,
1596dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
1597dnl # a spinlock_t to improve the fastpath performance.
1598dnl #
1599AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
1600 AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
97fd6a07
BB		 1601 tmp_flags="$EXTRA_KCFLAGS"
1602 EXTRA_KCFLAGS="-Werror"
9b2048c2
BB		 1603 SPL_LINUX_TRY_COMPILE([
1604 #include <linux/sched.h>
1605 #include <linux/fs_struct.h>
1606 ],[
1607 struct fs_struct fs;
1608 spin_lock_init(&fs.lock);
1609 ],[
1610 AC_MSG_RESULT(yes)
1611 AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
1612 [struct fs_struct uses spinlock_t])
1613 ],[
1614 AC_MSG_RESULT(no)
1615 ])
97fd6a07 1616 EXTRA_KCFLAGS="$tmp_flags"
9b2048c2
BB		 1617])
1618
ec7d53e9
BB		 1619dnl #
1620dnl # 2.6.29 API change,
1621dnl # check whether 'struct cred' exists
1622dnl #
1623AC_DEFUN([SPL_AC_CRED_STRUCT], [
1624 AC_MSG_CHECKING([whether struct cred exists])
1625 SPL_LINUX_TRY_COMPILE([
1626 #include <linux/cred.h>
1627 ],[
03318641 1628 struct cred *cr __attribute__ ((unused));
ec7d53e9
BB		 1629 cr = NULL;
1630 ],[
1631 AC_MSG_RESULT(yes)
1632 AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
1633 ],[
1634 AC_MSG_RESULT(no)
1635 ])
1636])
1637
1638dnl #
e811949a 1639dnl # Custom SPL patch may export this symbol.
ec7d53e9
BB		 1640dnl #
1641AC_DEFUN([SPL_AC_GROUPS_SEARCH], [
1642 SPL_CHECK_SYMBOL_EXPORT(
1643 [groups_search],
1644 [],
1645 [AC_DEFINE(HAVE_GROUPS_SEARCH, 1,
1646 [groups_search() is available])],
1647 [])
1648])
e811949a
BB		 1649
1650dnl #
1651dnl # 2.6.x API change,
1652dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
1653dnl #
1654AC_DEFUN([SPL_AC_PUT_TASK_STRUCT], [
1655 SPL_CHECK_SYMBOL_EXPORT(
1656 [__put_task_struct],
1657 [],
1658 [AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
1659 [__put_task_struct() is available])],
1660 [])
1661])
3977f837
BB		 1662
1663dnl #
1664dnl # 2.6.32 API change,
1665dnl # Unused 'struct file *' removed from prototype.
1666dnl #
1667AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
1668 AC_MSG_CHECKING([whether proc_handler() wants 5 args])
1669 SPL_LINUX_TRY_COMPILE([
1670 #include <linux/sysctl.h>
1671 ],[
1672 proc_dostring(NULL, 0, NULL, NULL, NULL);
1673 ],[
1674 AC_MSG_RESULT(yes)
1675 AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
1676 [proc_handler() wants 5 args])
1677 ],[
1678 AC_MSG_RESULT(no)
1679 ])
1680])
b868e22f
BB		 1681
1682dnl #
1683dnl # 2.6.x API change,
1684dnl # kvasprintf() function added.
1685dnl #
1686AC_DEFUN([SPL_AC_KVASPRINTF], [
1687 SPL_CHECK_SYMBOL_EXPORT(
1688 [kvasprintf],
1689 [],
1690 [AC_DEFINE(HAVE_KVASPRINTF, 1,
1691 [kvasprintf() is available])],
1692 [])
1693])
f0ff89fc
BB		 1694
1695dnl #
1696dnl # 2.6.35 API change,
1697dnl # Unused 'struct dentry *' removed from prototype.
1698dnl #
1699AC_DEFUN([SPL_AC_3ARGS_FILE_FSYNC], [
1700 AC_MSG_CHECKING([whether file_fsync() wants 3 args])
1701 SPL_LINUX_TRY_COMPILE([
1702 #include <linux/buffer_head.h>
1703 ],[
1704 file_fsync(NULL, NULL, 0);
1705 ],[
1706 AC_MSG_RESULT(yes)
1707 AC_DEFINE(HAVE_3ARGS_FILE_FSYNC, 1,
1708 [file_fsync() wants 3 args])
1709 ],[
1710 AC_MSG_RESULT(no)
1711 ])
1712])
46aa7b39
NB		 1713
1714dnl #
1715dnl # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
1716dnl # Earlier versions of rwsem_is_locked() were inline and had a race
1717dnl # condition. The fixed version is exported as a symbol. The race
1718dnl # condition is fixed by acquiring sem->wait_lock, so we must not
1719dnl # call that version while holding sem->wait_lock.
1720dnl #
1721AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED], [
1722 SPL_CHECK_SYMBOL_EXPORT(
1723 [rwsem_is_locked],
1724 [lib/rwsem-spinlock.c],
1725 [AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
1726 [rwsem_is_locked() acquires sem->wait_lock])],
1727 [])
1728])
914b0631
BB		 1729
1730dnl #
1731dnl # 2.6.37 API compat,
1732dnl # The function invalidate_inodes() is no longer exported by the kernel.
1733dnl # The prototype however is still available which means it is safe
1734dnl # to acquire the symbol's address using spl_kallsyms_lookup_name().
1735dnl #
1736AC_DEFUN([SPL_AC_KERNEL_INVALIDATE_INODES], [
1737 SPL_CHECK_SYMBOL_EXPORT(
1738 [invalidate_inodes],
1739 [],
1740 [AC_DEFINE(HAVE_INVALIDATE_INODES, 1,
1741 [invalidate_inodes() is available])],
1742 [])
1743])
e76f4bf1 1744
9b0f9079
BB		 1745dnl #
1746dnl # 2.6.39 API compat,
1747dnl # The function invalidate_inodes() now take 2 arguments. The second
1748dnl # 'kill_dirty' argument describes how invalidate_inodes() should
1749dnl # handle dirty inodes. Only when set will dirty inodes be discarded,
1750dnl # otherwise they will be handled as busy.
1751dnl #
1752dnl # Unfortunately, we don't have access to the invalidate_inodes()
1753dnl # prototype so it's not easy to check how many arguments it takes.
1754dnl # However, this change was done for the benefit of invalidate_device()
1755dnl # which also added an argument. The invalidate_device() symbol does
1756dnl # exist in the development headers so if it takes two arguments we
1757dnl # can fairly safely infer that invalidate_inodes() takes two arguments
1758dnl # as well. See commit 93b270f76e7ef3b81001576860c2701931cdc78b.
1759dnl #
1760AC_DEFUN([SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES],
1761 [AC_MSG_CHECKING([whether invalidate_inodes() wants 2 args])
1762 SPL_LINUX_TRY_COMPILE([
1763 #include <linux/fs.h>
1764 ],[
1765 return __invalidate_device(NULL, 0);
1766 ],[
1767 AC_MSG_RESULT(yes)
1768 AC_DEFINE(HAVE_2ARGS_INVALIDATE_INODES, 1,
1769 [invalidate_inodes() wants 2 args])
1770 ],[
1771 AC_MSG_RESULT(no)
1772 ])
1773])
1774
e76f4bf1
BB		 1775dnl #
1776dnl # 2.6.xx API compat,
1777dnl # There currently exists no exposed API to partially shrink the dcache.
1778dnl # The expected mechanism to shrink the cache is a registered shrinker
1779dnl # which is called during memory pressure.
1780dnl #
1781AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY], [
1782 SPL_CHECK_SYMBOL_EXPORT(
1783 [shrink_dcache_memory],
1784 [fs/dcache.c],
1785 [AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
1786 [shrink_dcache_memory() is available])],
1787 [])
1788])
1789
1790dnl #
1791dnl # 2.6.xx API compat,
1792dnl # There currently exists no exposed API to partially shrink the icache.
1793dnl # The expected mechanism to shrink the cache is a registered shrinker
1794dnl # which is called during memory pressure.
1795dnl #
1796AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY], [
1797 SPL_CHECK_SYMBOL_EXPORT(
1798 [shrink_icache_memory],
1799 [fs/inode.c],
1800 [AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
1801 [shrink_icache_memory() is available])],
1802 [])
1803])
b1cbc461
BB		 1804
1805dnl #
1806dnl # 2.6.39 API compat,
1807dnl # The path_lookup() function has been renamed to kern_path_parent()
1808dnl # and the flags argument has been removed. The only behavior now
1809dnl # offered is that of LOOKUP_PARENT. The spl already always passed
1810dnl # this flag so dropping the flag does not impact us.
1811dnl #
1812AC_DEFUN([SPL_AC_KERN_PATH_PARENT], [
1813 SPL_CHECK_SYMBOL_EXPORT(
1814 [kern_path_parent],
1815 [fs/namei.c],
1816 [AC_DEFINE(HAVE_KERN_PATH_PARENT, 1,
1817 [kern_path_parent() is available])],
1818 [])
1819])
3dfc591a
BB		 1820
1821dnl #
1822dnl # 2.6.39 API compat,
1823dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
1824dnl # This was done to avoid always having to allocate the maximum size
1825dnl # workspace (268K). The caller can now specific the windowBits and
1826dnl # memLevel compression parameters to get a smaller workspace.
1827dnl #
1828AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
1829 [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
1830 SPL_LINUX_TRY_COMPILE([
1831 #include <linux/zlib.h>
1832 ],[
1833 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
1834 ],[
1835 AC_MSG_RESULT(yes)
1836 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
1837 [zlib_deflate_workspacesize() wants 2 args])
1838 ],[
1839 AC_MSG_RESULT(no)
1840 ])
1841])
a55bcaad
BB		 1842
1843dnl #
1844dnl # 2.6.39 API change,
1845dnl # Shrinker adjust to use common shrink_control structure.
1846dnl #
1847AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
1848 AC_MSG_CHECKING([whether struct shrink_control exists])
1849 SPL_LINUX_TRY_COMPILE([
1850 #include <linux/mm.h>
1851 ],[
1852 struct shrink_control sc __attribute__ ((unused));
1853
1854 sc.nr_to_scan = 0;
1855 sc.gfp_mask = GFP_KERNEL;
1856 ],[
1857 AC_MSG_RESULT(yes)
1858 AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
1859 [struct shrink_control exists])
1860 ],[
1861 AC_MSG_RESULT(no)
1862 ])
1863])
mirror of SPL module used by << 0.8.x ZFSOnLinux