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Ensure kmem_alloc() and vmem_alloc() never fail
[mirror_spl.git] / config / spl-build.m4
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716154c5
BB		 1###############################################################################
2# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
3# Copyright (C) 2007 The Regents of the University of California.
4# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
5###############################################################################
6# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
7###############################################################################
8
86933a6e
BB		 9AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
10 SPL_AC_KERNEL
11
86933a6e
BB		 12 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
13 dnl # compiler options are added by the kernel build system.
14 abs_srcdir=`readlink -f ${srcdir}`
c950d148 15 KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
16b719f0
BB		 16 KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir}/include"
17 KERNELCPPFLAGS="$KERNELCPPFLAGS -include ${abs_srcdir}/spl_config.h"
86933a6e
BB		 18
19 if test "${LINUX_OBJ}" != "${LINUX}"; then
20 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
21 fi
22
23 AC_SUBST(KERNELMAKE_PARAMS)
24 AC_SUBST(KERNELCPPFLAGS)
25
26 SPL_AC_DEBUG
27 SPL_AC_DEBUG_KMEM
055ffd98 28 SPL_AC_DEBUG_KMEM_TRACKING
5e9b5d83 29 SPL_AC_ATOMIC_SPINLOCK
302b88e6
BB		 30 SPL_AC_TYPE_ATOMIC64_CMPXCHG
31 SPL_AC_TYPE_ATOMIC64_XCHG
d04c8a56 32 SPL_AC_TYPE_UINTPTR_T
86933a6e
BB		 33 SPL_AC_3ARGS_INIT_WORK
34 SPL_AC_2ARGS_REGISTER_SYSCTL
35 SPL_AC_SET_SHRINKER
36 SPL_AC_PATH_IN_NAMEIDATA
37 SPL_AC_TASK_CURR
38 SPL_AC_CTL_UNNUMBERED
79a3bf13 39 SPL_AC_CTL_NAME
86933a6e
BB		 40 SPL_AC_FLS64
41 SPL_AC_DEVICE_CREATE
42 SPL_AC_5ARGS_DEVICE_CREATE
43 SPL_AC_CLASS_DEVICE_CREATE
44 SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
45 SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
46 SPL_AC_TIMESPEC_SUB
47 SPL_AC_INIT_UTSNAME
48 SPL_AC_FDTABLE_HEADER
49 SPL_AC_FILES_FDTABLE
50 SPL_AC_UACCESS_HEADER
51 SPL_AC_KMALLOC_NODE
52 SPL_AC_MONOTONIC_CLOCK
53 SPL_AC_INODE_I_MUTEX
4d54fdee 54 SPL_AC_MUTEX_OWNER
86933a6e 55 SPL_AC_MUTEX_LOCK_NESTED
86933a6e
BB		 56 SPL_AC_3ARGS_ON_EACH_CPU
57 SPL_AC_KALLSYMS_LOOKUP_NAME
58 SPL_AC_GET_VMALLOC_INFO
59 SPL_AC_PGDAT_HELPERS
60 SPL_AC_FIRST_ONLINE_PGDAT
61 SPL_AC_NEXT_ONLINE_PGDAT
62 SPL_AC_NEXT_ZONE
63 SPL_AC_PGDAT_LIST
86933a6e 64 SPL_AC_GLOBAL_PAGE_STATE
6ae7fef5
BB		 65 SPL_AC_ZONE_STAT_ITEM_FREE
66 SPL_AC_ZONE_STAT_ITEM_INACTIVE
67 SPL_AC_ZONE_STAT_ITEM_ACTIVE
68 SPL_AC_GET_ZONE_COUNTS
7119bf70 69 SPL_AC_USER_PATH_DIR
51a727e9
BB		 70 SPL_AC_SET_FS_PWD
71 SPL_AC_2ARGS_SET_FS_PWD
86933a6e
BB		 72 SPL_AC_2ARGS_VFS_UNLINK
73 SPL_AC_4ARGS_VFS_RENAME
ec7d53e9
BB		 74 SPL_AC_CRED_STRUCT
75 SPL_AC_GROUPS_SEARCH
e811949a 76 SPL_AC_PUT_TASK_STRUCT
3977f837 77 SPL_AC_5ARGS_PROC_HANDLER
b868e22f 78 SPL_AC_KVASPRINTF
f0ff89fc 79 SPL_AC_3ARGS_FILE_FSYNC
86933a6e
BB		 80])
81
82AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
bb339d06 83 modpost=$LINUX/scripts/Makefile.modpost
86933a6e 84 AC_MSG_CHECKING([kernel file name for module symbols])
bb339d06
BB		 85 if test -f "$modpost"; then
86 if grep -q Modules.symvers $modpost; then
87 LINUX_SYMBOLS=Modules.symvers
88 else
89 LINUX_SYMBOLS=Module.symvers
90 fi
86933a6e 91 else
bb339d06 92 LINUX_SYMBOLS=NONE
86933a6e
BB		 93 fi
94 AC_MSG_RESULT($LINUX_SYMBOLS)
95 AC_SUBST(LINUX_SYMBOLS)
96])
97
57d86234 98AC_DEFUN([SPL_AC_KERNEL], [
57d86234 99 AC_ARG_WITH([linux],
100 AS_HELP_STRING([--with-linux=PATH],
101 [Path to kernel source]),
39a3d2a4 102 [kernelsrc="$withval"])
57d86234 103
104 AC_ARG_WITH([linux-obj],
105 AS_HELP_STRING([--with-linux-obj=PATH],
106 [Path to kernel build objects]),
107 [kernelbuild="$withval"])
108
109 AC_MSG_CHECKING([kernel source directory])
110 if test -z "$kernelsrc"; then
534c4e38
BM		 111 headersdir="/lib/modules/$(uname -r)/build"
112 if test -e "$headersdir"; then
113 sourcelink=$(readlink -f "$headersdir")
114 else
115 sourcelink=$(ls -1d /usr/src/kernels/* \
116 /usr/src/linux-* \
117 2>/dev/null | grep -v obj | tail -1)
118 fi
57d86234 119
8fd4e3af 120 if test -n "$sourcelink" && test -e ${sourcelink}; then
d4326403 121 kernelsrc=`readlink -f ${sourcelink}`
d4326403 122 else
57d86234 123 AC_MSG_RESULT([Not found])
124 AC_MSG_ERROR([
8fd4e3af
BB		 125 *** Please make sure the kernel devel package for your distribution
126 *** is installed then try again. If that fails you can specify the
127 *** location of the kernel source with the '--with-linux=PATH' option.])
57d86234 128 fi
c5f70460
BB		 129 else
130 if test "$kernelsrc" = "NONE"; then
131 kernsrcver=NONE
132 fi
57d86234 133 fi
134
135 AC_MSG_RESULT([$kernelsrc])
136 AC_MSG_CHECKING([kernel build directory])
39a3d2a4 137 if test -z "$kernelbuild"; then
e2d28a37
BB		 138 if test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
139 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
140 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
141 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
142 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
143 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
39a3d2a4
BB		 144 else
145 kernelbuild=${kernelsrc}
146 fi
bf338d8d 147 fi
57d86234 148 AC_MSG_RESULT([$kernelbuild])
149
150 AC_MSG_CHECKING([kernel source version])
fd921c2e
BB		 151 utsrelease1=$kernelbuild/include/linux/version.h
152 utsrelease2=$kernelbuild/include/linux/utsrelease.h
153 utsrelease3=$kernelbuild/include/generated/utsrelease.h
154 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
155 utsrelease=linux/version.h
156 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
157 utsrelease=linux/utsrelease.h
158 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
159 utsrelease=generated/utsrelease.h
160 fi
57d86234 161
fd921c2e
BB		 162 if test "$utsrelease"; then
163 kernsrcver=`(echo "#include <$utsrelease>";
57d86234 164 echo "kernsrcver=UTS_RELEASE") |
d4326403 165 cpp -I $kernelbuild/include |
57d86234 166 grep "^kernsrcver=" | cut -d \" -f 2`
57d86234 167
fd921c2e
BB		 168 if test -z "$kernsrcver"; then
169 AC_MSG_RESULT([Not found])
170 AC_MSG_ERROR([*** Cannot determine kernel version.])
171 fi
172 else
57d86234 173 AC_MSG_RESULT([Not found])
fd921c2e 174 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
57d86234 175 fi
176
177 AC_MSG_RESULT([$kernsrcver])
178
57d86234 179 LINUX=${kernelsrc}
180 LINUX_OBJ=${kernelbuild}
c5f70460
BB		 181 LINUX_VERSION=${kernsrcver}
182
57d86234 183 AC_SUBST(LINUX)
184 AC_SUBST(LINUX_OBJ)
c5f70460 185 AC_SUBST(LINUX_VERSION)
57d86234 186
86933a6e 187 SPL_AC_MODULE_SYMVERS
2e0e7e69
BB		 188])
189
86933a6e
BB		 190dnl #
191dnl # Default SPL user configuration
192dnl #
18142514
BB		 193AC_DEFUN([SPL_AC_CONFIG_USER], [
194 dnl # Explicitly check for gawk, we require it for the the usermode
195 dnl # helper. For some reason the standard awk command does not
196 dnl # behave correctly when invoked from the usermode helper.
197 AS_IF([test "x$AWK" != xgawk], [
198 AC_MSG_ERROR([
199 *** Required util gawk missing. Please install the required
200 *** gawk package for your distribution and try again.])
201 ])
202])
86933a6e 203
6a1c3d41 204AC_DEFUN([SPL_AC_LICENSE], [
86933a6e
BB		 205 AC_MSG_CHECKING([spl license])
206 LICENSE=GPL
207 AC_MSG_RESULT([$LICENSE])
6a1c3d41 208 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
86933a6e
BB		 209 AC_SUBST(LICENSE)
210])
211
212AC_DEFUN([SPL_AC_CONFIG], [
213 SPL_CONFIG=all
214 AC_ARG_WITH([config],
215 AS_HELP_STRING([--with-config=CONFIG],
c1541dfe 216 [Config file 'kernel|user|all|srpm']),
86933a6e
BB		 217 [SPL_CONFIG="$withval"])
218
219 AC_MSG_CHECKING([spl config])
220 AC_MSG_RESULT([$SPL_CONFIG]);
221 AC_SUBST(SPL_CONFIG)
222
223 case "$SPL_CONFIG" in
224 kernel) SPL_AC_CONFIG_KERNEL ;;
225 user) SPL_AC_CONFIG_USER ;;
226 all) SPL_AC_CONFIG_KERNEL
227 SPL_AC_CONFIG_USER ;;
c1541dfe 228 srpm) ;;
86933a6e
BB		 229 *)
230 AC_MSG_RESULT([Error!])
231 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
c1541dfe 232 user kernel|user|all|srpm]) ;;
86933a6e
BB		 233 esac
234
235 AM_CONDITIONAL([CONFIG_USER],
236 [test "$SPL_CONFIG" = user] ||
237 [test "$SPL_CONFIG" = all])
238 AM_CONDITIONAL([CONFIG_KERNEL],
239 [test "$SPL_CONFIG" = kernel] ||
240 [test "$SPL_CONFIG" = all])
6a1c3d41 241])
242
055ffd98
BB		 243dnl #
244dnl # Enable if the SPL should be compiled with internal debugging enabled.
245dnl # By default this support is disabled.
246dnl #
57d86234 247AC_DEFUN([SPL_AC_DEBUG], [
c950d148 248 AC_MSG_CHECKING([whether debugging is enabled])
055ffd98
BB		 249 AC_ARG_ENABLE([debug],
250 [AS_HELP_STRING([--enable-debug],
251 [Enable generic debug support @<:@default=no@:>@])],
252 [],
253 [enable_debug=no])
254
255 AS_IF([test "x$enable_debug" = xyes],
c950d148 256 [
c950d148
BB		 257 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
258 DEBUG_CFLAGS="-DDEBUG -Werror"
259 ],
260 [
c950d148
BB		 261 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
262 DEBUG_CFLAGS="-DNDEBUG"
263 ])
055ffd98 264
c950d148 265 AC_SUBST(DEBUG_CFLAGS)
055ffd98 266 AC_MSG_RESULT([$enable_debug])
57d86234 267])
268
055ffd98
BB		 269dnl #
270dnl # Enabled by default it provides a minimal level of memory tracking.
271dnl # A total count of bytes allocated is kept for each alloc and free.
272dnl # Then at module unload time a report to the console will be printed
273dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
274dnl # and provide an easy way to inspect the kmem based slab.
275dnl #
57d86234 276AC_DEFUN([SPL_AC_DEBUG_KMEM], [
055ffd98
BB		 277 AC_ARG_ENABLE([debug-kmem],
278 [AS_HELP_STRING([--enable-debug-kmem],
279 [Enable basic kmem accounting @<:@default=yes@:>@])],
280 [],
281 [enable_debug_kmem=yes])
57d86234 282
055ffd98
BB		 283 AS_IF([test "x$enable_debug_kmem" = xyes],
284 [AC_DEFINE([DEBUG_KMEM], [1],
285 [Define to 1 to enable basic kmem accounting])
286 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"])
287
288 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
289 AC_MSG_RESULT([$enable_debug_kmem])
57d86234 290])
291
055ffd98
BB		 292dnl #
293dnl # Disabled by default it provides detailed memory tracking. This
294dnl # feature also requires --enable-debug-kmem to be set. When enabled
295dnl # not only will total bytes be tracked but also the location of every
296dnl # alloc and free. When the SPL module is unloaded a list of all leaked
297dnl # addresses and where they were allocated will be dumped to the console.
298dnl # Enabling this feature has a significant impact on performance but it
299dnl # makes finding memory leaks pretty straight forward.
300dnl #
301AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
302 AC_ARG_ENABLE([debug-kmem-tracking],
303 [AS_HELP_STRING([--enable-debug-kmem-tracking],
304 [Enable detailed kmem tracking @<:@default=no@:>@])],
305 [],
306 [enable_debug_kmem_tracking=no])
307
308 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
309 [AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
310 [Define to 1 to enable detailed kmem tracking])
311 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"])
312
313 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
314 AC_MSG_RESULT([$enable_debug_kmem_tracking])
57d86234 315])
316
317dnl #
318dnl # SPL_LINUX_CONFTEST
319dnl #
320AC_DEFUN([SPL_LINUX_CONFTEST], [
dbe561d8 321cat confdefs.h - <<_ACEOF >conftest.c
57d86234 322$1
323_ACEOF
324])
325
326dnl #
327dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
328dnl #
329m4_define([SPL_LANG_PROGRAM], [
330$1
331int
332main (void)
333{
334dnl Do *not* indent the following line: there may be CPP directives.
335dnl Don't move the `;' right after for the same reason.
336$2
337 ;
338 return 0;
339}
340])
341
342dnl #
343dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
344dnl #
345AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
c5f70460
BB		 346 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
347 rm -Rf build && mkdir -p build
348 echo "obj-m := conftest.o" >build/Makefile
349 AS_IF(
3d0cb2d3 350 [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		 351 [$4],
352 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
353 )
354 rm -Rf build
57d86234 355])
356
357dnl #
358dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
359dnl #
360AC_DEFUN([SPL_LINUX_TRY_COMPILE],
361 [SPL_LINUX_COMPILE_IFELSE(
d50bd9e2 362 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
363 [modules],
364 [test -s build/conftest.o],
365 [$3], [$4])
57d86234 366])
367
368dnl #
369dnl # SPL_LINUX_CONFIG
370dnl #
371AC_DEFUN([SPL_LINUX_CONFIG],
372 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
373 SPL_LINUX_TRY_COMPILE([
374 #ifndef AUTOCONF_INCLUDED
375 #include <linux/config.h>
376 #endif
377 ],[
378 #ifndef CONFIG_$1
379 #error CONFIG_$1 not #defined
380 #endif
381 ],[
382 AC_MSG_RESULT([yes])
383 $2
384 ],[
385 AC_MSG_RESULT([no])
386 $3
387 ])
388])
389
390dnl #
391dnl # SPL_CHECK_SYMBOL_EXPORT
392dnl # check symbol exported or not
393dnl #
394AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
395 [AC_MSG_CHECKING([whether symbol $1 is exported])
2e0e7e69
BB		 396 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
397 $LINUX_OBJ/Module*.symvers 2>/dev/null
57d86234 398 rc=$?
399 if test $rc -ne 0; then
400 export=0
401 for file in $2; do
2e0e7e69
BB		 402 grep -q -E "EXPORT_SYMBOL.*($1)" \
403 "$LINUX_OBJ/$file" 2>/dev/null
57d86234 404 rc=$?
405 if test $rc -eq 0; then
406 export=1
407 break;
408 fi
409 done
410 if test $export -eq 0; then
411 AC_MSG_RESULT([no])
412 $4
413 else
414 AC_MSG_RESULT([yes])
415 $3
416 fi
417 else
418 AC_MSG_RESULT([yes])
419 $3
420 fi
421])
422
86de8532 423dnl #
424dnl # SPL_CHECK_HEADER
425dnl # check whether header exists and define HAVE_$2_HEADER
426dnl #
427AC_DEFUN([SPL_CHECK_HEADER],
428 [AC_MSG_CHECKING([whether header $1 exists])
429 SPL_LINUX_TRY_COMPILE([
d50bd9e2 430 #include <$1>
86de8532 431 ],[
432 return 0;
433 ],[
434 AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
435 AC_MSG_RESULT(yes)
436 $3
437 ],[
438 AC_MSG_RESULT(no)
439 $4
440 ])
441])
6a6cafbe 442
57d86234 443dnl #
d04c8a56
BB		 444dnl # Use the atomic implemenation based on global spinlocks. This
445dnl # should only be needed by 32-bit kernels which do not provide
446dnl # the atomic64_* API. It may be optionally enabled as a fallback
447dnl # if problems are observed with the direct mapping to the native
448dnl # Linux atomic operations. You may not disable atomic spinlocks
449dnl # if you kernel does not an atomic64_* API.
57d86234 450dnl #
d04c8a56
BB		 451AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
452 AC_ARG_ENABLE([atomic-spinlocks],
453 [AS_HELP_STRING([--enable-atomic-spinlocks],
454 [Atomic types use spinlocks @<:@default=check@:>@])],
455 [],
456 [enable_atomic_spinlocks=check])
57d86234 457
a0f6da3d 458 SPL_LINUX_TRY_COMPILE([
459 #include <asm/atomic.h>
460 ],[
461 atomic64_t *ptr;
462 ],[
d04c8a56 463 have_atomic64_t=yes
a0f6da3d 464 AC_DEFINE(HAVE_ATOMIC64_T, 1,
d04c8a56 465 [kernel defines atomic64_t])
a0f6da3d 466 ],[
d04c8a56
BB		 467 have_atomic64_t=no
468 ])
469
470 AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
471 AS_IF([test "x$have_atomic64_t" = xyes], [
472 enable_atomic_spinlocks=no
473 ],[
474 enable_atomic_spinlocks=yes
475 ])
a0f6da3d 476 ])
d04c8a56
BB		 477
478 AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
479 AC_DEFINE([ATOMIC_SPINLOCK], [1],
480 [Atomic types use spinlocks])
481 ],[
482 AS_IF([test "x$have_atomic64_t" = xno], [
483 AC_MSG_FAILURE(
484 [--disable-atomic-spinlocks given but required atomic64 support is unavailable])
485 ])
486 ])
487
488 AC_MSG_CHECKING([whether atomic types use spinlocks])
489 AC_MSG_RESULT([$enable_atomic_spinlocks])
490
491 AC_MSG_CHECKING([whether kernel defines atomic64_t])
492 AC_MSG_RESULT([$have_atomic64_t])
a0f6da3d 493])
494
302b88e6
BB		 495dnl #
496dnl # 2.6.24 API change,
497dnl # check if atomic64_cmpxchg is defined
498dnl #
499AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
500 [AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
501 SPL_LINUX_TRY_COMPILE([
502 #include <asm/atomic.h>
503 ],[
504 atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
505 ],[
506 AC_MSG_RESULT([yes])
507 AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
508 [kernel defines atomic64_cmpxchg])
509 ],[
510 AC_MSG_RESULT([no])
511 ])
512])
513
514dnl #
515dnl # 2.6.24 API change,
516dnl # check if atomic64_xchg is defined
517dnl #
518AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
519 [AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
520 SPL_LINUX_TRY_COMPILE([
521 #include <asm/atomic.h>
522 ],[
523 atomic64_xchg((atomic64_t *)NULL, 0);
524 ],[
525 AC_MSG_RESULT([yes])
526 AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
527 [kernel defines atomic64_xchg])
528 ],[
529 AC_MSG_RESULT([no])
530 ])
531])
532
d04c8a56
BB		 533dnl #
534dnl # 2.6.24 API change,
535dnl # check if uintptr_t typedef is defined
536dnl #
537AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
538 [AC_MSG_CHECKING([whether kernel defines uintptr_t])
539 SPL_LINUX_TRY_COMPILE([
540 #include <linux/types.h>
541 ],[
542 uintptr_t *ptr;
543 ],[
544 AC_MSG_RESULT([yes])
545 AC_DEFINE(HAVE_UINTPTR_T, 1,
546 [kernel defines uintptr_t])
547 ],[
548 AC_MSG_RESULT([no])
549 ])
550])
551
57d86234 552dnl #
3d061e9d 553dnl # 2.6.20 API change,
57d86234 554dnl # INIT_WORK use 2 args and not store data inside
555dnl #
556AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
557 [AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
558 SPL_LINUX_TRY_COMPILE([
d50bd9e2 559 #include <linux/workqueue.h>
57d86234 560 ],[
d50bd9e2 561 struct work_struct work;
562 INIT_WORK(&work, NULL, NULL);
57d86234 563 ],[
d50bd9e2 564 AC_MSG_RESULT(yes)
565 AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
566 [INIT_WORK wants 3 args])
57d86234 567 ],[
d50bd9e2 568 AC_MSG_RESULT(no)
57d86234 569 ])
570])
571
572dnl #
3d061e9d 573dnl # 2.6.21 API change,
57d86234 574dnl # 'register_sysctl_table' use only one argument instead of two
575dnl #
576AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
577 [AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
578 SPL_LINUX_TRY_COMPILE([
d50bd9e2 579 #include <linux/sysctl.h>
57d86234 580 ],[
d50bd9e2 581 return register_sysctl_table(NULL,0);
57d86234 582 ],[
d50bd9e2 583 AC_MSG_RESULT(yes)
584 AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
585 [register_sysctl_table() wants 2 args])
57d86234 586 ],[
d50bd9e2 587 AC_MSG_RESULT(no)
57d86234 588 ])
589])
590
57d86234 591dnl #
3d061e9d 592dnl # 2.6.23 API change
57d86234 593dnl # Old set_shrinker API replaced with register_shrinker
594dnl #
595AC_DEFUN([SPL_AC_SET_SHRINKER], [
596 AC_MSG_CHECKING([whether set_shrinker() available])
597 SPL_LINUX_TRY_COMPILE([
598 #include <linux/mm.h>
599 ],[
600 return set_shrinker(DEFAULT_SEEKS, NULL);
601 ],[
602 AC_MSG_RESULT([yes])
603 AC_DEFINE(HAVE_SET_SHRINKER, 1,
604 [set_shrinker() available])
605 ],[
606 AC_MSG_RESULT([no])
607 ])
608])
609
610dnl #
3d061e9d 611dnl # 2.6.25 API change,
57d86234 612dnl # struct path entry added to struct nameidata
613dnl #
614AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
615 [AC_MSG_CHECKING([whether struct path used in struct nameidata])
616 SPL_LINUX_TRY_COMPILE([
d50bd9e2 617 #include <linux/namei.h>
57d86234 618 ],[
d50bd9e2 619 struct nameidata nd;
57d86234 620
621 nd.path.mnt = NULL;
622 nd.path.dentry = NULL;
623 ],[
d50bd9e2 624 AC_MSG_RESULT(yes)
625 AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
626 [struct path used in struct nameidata])
57d86234 627 ],[
d50bd9e2 628 AC_MSG_RESULT(no)
57d86234 629 ])
630])
631
632dnl #
633dnl # Custom SPL patch may export this system it is not required
634dnl #
635AC_DEFUN([SPL_AC_TASK_CURR], [
636 SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
637 [AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
638 [])
639])
640
641dnl #
3d061e9d 642dnl # 2.6.19 API change,
57d86234 643dnl # Use CTL_UNNUMBERED when binary sysctl is not required
644dnl #
645AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
646 [AC_MSG_CHECKING([whether unnumbered sysctl support exists])
647 SPL_LINUX_TRY_COMPILE([
d50bd9e2 648 #include <linux/sysctl.h>
57d86234 649 ],[
650 #ifndef CTL_UNNUMBERED
651 #error CTL_UNNUMBERED undefined
652 #endif
653 ],[
d50bd9e2 654 AC_MSG_RESULT(yes)
655 AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
656 [unnumbered sysctl support exists])
57d86234 657 ],[
d50bd9e2 658 AC_MSG_RESULT(no)
57d86234 659 ])
660])
877a32e9 661
79a3bf13
BB		 662dnl #
663dnl # 2.6.33 API change,
664dnl # Removed .ctl_name from struct ctl_table.
665dnl #
666AC_DEFUN([SPL_AC_CTL_NAME], [
667 AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
668 SPL_LINUX_TRY_COMPILE([
669 #include <linux/sysctl.h>
670 ],[
671 struct ctl_table ctl;
672 ctl.ctl_name = 0;
673 ],[
674 AC_MSG_RESULT(yes)
675 AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
676 ],[
677 AC_MSG_RESULT(no)
678 ])
679])
680
877a32e9 681dnl #
682dnl # 2.6.16 API change.
683dnl # Check if 'fls64()' is available
684dnl #
685AC_DEFUN([SPL_AC_FLS64],
6a6cafbe 686 [AC_MSG_CHECKING([whether fls64() is available])
687 SPL_LINUX_TRY_COMPILE([
688 #include <linux/bitops.h>
689 ],[
690 return fls64(0);
691 ],[
692 AC_MSG_RESULT(yes)
693 AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
694 ],[
695 AC_MSG_RESULT(no)
696 ])
877a32e9 697])
46c685d0 698
699dnl #
700dnl # 2.6.18 API change, check whether device_create() is available.
701dnl # Device_create() was introduced in 2.6.18 and depricated
702dnl # class_device_create() which was fully removed in 2.6.26.
703dnl #
704AC_DEFUN([SPL_AC_DEVICE_CREATE], [
705 SPL_CHECK_SYMBOL_EXPORT(
706 [device_create],
707 [drivers/base/core.c],
708 [AC_DEFINE(HAVE_DEVICE_CREATE, 1,
709 [device_create() is available])],
6a6cafbe 710 [])
46c685d0 711])
712
8123ac4f
BB		 713dnl #
714dnl # 2.6.27 API change,
715dnl # device_create() uses 5 args, new 'drvdata' argument.
716dnl #
717AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
718 AC_MSG_CHECKING([whether device_create() wants 5 args])
719 tmp_flags="$EXTRA_KCFLAGS"
720 EXTRA_KCFLAGS="-Werror"
721 SPL_LINUX_TRY_COMPILE([
722 #include <linux/device.h>
723 ],[
724 device_create(NULL, NULL, 0, NULL, "%d", 1);
725 ],[
726 AC_MSG_RESULT(yes)
727 AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
728 [device_create wants 5 args])
729 ],[
730 AC_MSG_RESULT(no)
731 ])
732 EXTRA_KCFLAGS="$tmp_flags"
733])
734
46c685d0 735dnl #
736dnl # 2.6.13 API change, check whether class_device_create() is available.
737dnl # Class_device_create() was introduced in 2.6.13 and depricated
738dnl # class_simple_device_add() which was fully removed in 2.6.13.
739dnl #
740AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
741 SPL_CHECK_SYMBOL_EXPORT(
742 [class_device_create],
743 [drivers/base/class.c],
744 [AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
745 [class_device_create() is available])],
6a6cafbe 746 [])
46c685d0 747])
6a6cafbe 748
6a6cafbe 749dnl #
750dnl # 2.6.26 API change, set_normalized_timespec() is exported.
751dnl #
752AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
753 SPL_CHECK_SYMBOL_EXPORT(
754 [set_normalized_timespec],
755 [kernel/time.c],
756 [AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
757 [set_normalized_timespec() is available as export])],
758 [])
759])
760
761dnl #
762dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
763dnl # previously it was available in time.h as an inline.
764dnl #
86de8532 765AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
766 AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
6a6cafbe 767 SPL_LINUX_TRY_COMPILE([
768 #include <linux/time.h>
6a6cafbe 769 void set_normalized_timespec(struct timespec *ts,
25557fd8 770 time_t sec, long nsec) { }
771 ],
772 [],
773 [
6a6cafbe 774 AC_MSG_RESULT(no)
775 ],[
776 AC_MSG_RESULT(yes)
777 AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
778 [set_normalized_timespec() is available as inline])
779 ])
780])
781
782dnl #
783dnl # 2.6.18 API change,
784dnl # timespec_sub() inline function available in linux/time.h
785dnl #
86de8532 786AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
787 AC_MSG_CHECKING([whether timespec_sub() is available])
6a6cafbe 788 SPL_LINUX_TRY_COMPILE([
789 #include <linux/time.h>
790 ],[
791 struct timespec a, b, c = { 0 };
792 c = timespec_sub(a, b);
793 ],[
794 AC_MSG_RESULT(yes)
795 AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
796 ],[
797 AC_MSG_RESULT(no)
798 ])
799])
800
86de8532 801dnl #
3d061e9d 802dnl # 2.6.19 API change,
803dnl # check if init_utsname() is available in linux/utsname.h
804dnl #
805AC_DEFUN([SPL_AC_INIT_UTSNAME], [
806 AC_MSG_CHECKING([whether init_utsname() is available])
807 SPL_LINUX_TRY_COMPILE([
808 #include <linux/utsname.h>
809 ],[
810 struct new_utsname *a = init_utsname();
811 ],[
812 AC_MSG_RESULT(yes)
813 AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
814 ],[
815 AC_MSG_RESULT(no)
816 ])
817])
818
819dnl #
820dnl # 2.6.26 API change,
821dnl # definition of struct fdtable relocated to linux/fdtable.h
86de8532 822dnl #
823AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
824 SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
825])
322640b7 826
827dnl #
3d061e9d 828dnl # 2.6.14 API change,
829dnl # check whether 'files_fdtable()' exists
830dnl #
831AC_DEFUN([SPL_AC_FILES_FDTABLE], [
832 AC_MSG_CHECKING([whether files_fdtable() is available])
833 SPL_LINUX_TRY_COMPILE([
834 #include <linux/sched.h>
835 #include <linux/file.h>
836 #ifdef HAVE_FDTABLE_HEADER
837 #include <linux/fdtable.h>
838 #endif
839 ],[
840 struct files_struct *files = current->files;
841 struct fdtable *fdt = files_fdtable(files);
842 ],[
843 AC_MSG_RESULT(yes)
844 AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
845 ],[
846 AC_MSG_RESULT(no)
847 ])
848])
849
850dnl #
851dnl # 2.6.18 API change,
852dnl # added linux/uaccess.h
322640b7 853dnl #
854AC_DEFUN([SPL_AC_UACCESS_HEADER], [
855 SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
856])
3d061e9d 857
858dnl #
859dnl # 2.6.12 API change,
860dnl # check whether 'kmalloc_node()' is available.
861dnl #
862AC_DEFUN([SPL_AC_KMALLOC_NODE], [
863 AC_MSG_CHECKING([whether kmalloc_node() is available])
864 SPL_LINUX_TRY_COMPILE([
865 #include <linux/slab.h>
866 ],[
867 void *a = kmalloc_node(1, GFP_KERNEL, 0);
868 ],[
869 AC_MSG_RESULT(yes)
870 AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
871 ],[
872 AC_MSG_RESULT(no)
873 ])
874])
875
876dnl #
877dnl # 2.6.9 API change,
878dnl # check whether 'monotonic_clock()' is available it may
879dnl # be available for some archs but not others.
880dnl #
881AC_DEFUN([SPL_AC_MONOTONIC_CLOCK], [
882 SPL_CHECK_SYMBOL_EXPORT(
883 [monotonic_clock],
884 [],
885 [AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
886 [monotonic_clock() is available])],
887 [])
888])
889
890dnl #
891dnl # 2.6.16 API change,
892dnl # check whether 'struct inode' has i_mutex
893dnl #
894AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
895 AC_MSG_CHECKING([whether struct inode has i_mutex])
896 SPL_LINUX_TRY_COMPILE([
897 #include <linux/fs.h>
898 #include <linux/mutex.h>
899 ],[
900 struct inode i;
901 mutex_init(&i.i_mutex);
902 ],[
903 AC_MSG_RESULT(yes)
904 AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
905 ],[
906 AC_MSG_RESULT(no)
907 ])
908])
b61a6e8b 909
4d54fdee
BB		 910dnl #
911dnl # 2.6.29 API change,
912dnl # Adaptive mutexs introduced.
913dnl #
914AC_DEFUN([SPL_AC_MUTEX_OWNER], [
915 AC_MSG_CHECKING([whether struct mutex has owner])
916 SPL_LINUX_TRY_COMPILE([
917 #include <linux/mutex.h>
918 ],[
919 struct mutex mtx;
920 mtx.owner = NULL;
921 ],[
922 AC_MSG_RESULT(yes)
923 AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
924 ],[
925 AC_MSG_RESULT(no)
926 ])
927])
928
6c9433c1
BB		 929dnl #
930dnl # 2.6.18 API change,
931dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
932dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
933dnl # if the mutex validator is disabled or otherwise unavailable.
934dnl #
935AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
936 AC_MSG_CHECKING([whether mutex_lock_nested() is available])
937 SPL_LINUX_TRY_COMPILE([
938 #include <linux/mutex.h>
939 ],[
940 struct mutex mutex;
941 mutex_init(&mutex);
942 mutex_lock_nested(&mutex, 0);
943 ],[
944 AC_MSG_RESULT(yes)
945 AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
946 [mutex_lock_nested() is available])
947 ],[
948 AC_MSG_RESULT(no)
949 ])
950])
951
31a033ec
BB		 952dnl #
953dnl # 2.6.27 API change,
954dnl # on_each_cpu() uses 3 args, no 'retry' argument
955dnl #
956AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
957 AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
958 SPL_LINUX_TRY_COMPILE([
959 #include <linux/smp.h>
960 ],[
961 on_each_cpu(NULL, NULL, 0);
962 ],[
963 AC_MSG_RESULT(yes)
964 AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
965 [on_each_cpu wants 3 args])
966 ],[
967 AC_MSG_RESULT(no)
968 ])
969])
36b313da
BB		 970
971dnl #
d1ff2312
BB		 972dnl # 2.6.18 API change,
973dnl # kallsyms_lookup_name no longer exported
974dnl #
975AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME], [
976 SPL_CHECK_SYMBOL_EXPORT(
977 [kallsyms_lookup_name],
978 [],
979 [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
980 [kallsyms_lookup_name() is available])],
981 [])
982])
983
984dnl #
e11d6c5f
BB		 985dnl # Proposed API change,
986dnl # This symbol is not available in stock kernels. You may build a
987dnl # custom kernel with the *-spl-export-symbols.patch which will export
988dnl # these symbols for use. If your already rolling a custom kernel for
989dnl # your environment this is recommended.
d1ff2312
BB		 990dnl #
991AC_DEFUN([SPL_AC_GET_VMALLOC_INFO], [
992 SPL_CHECK_SYMBOL_EXPORT(
993 [get_vmalloc_info],
994 [],
995 [AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
996 [get_vmalloc_info() is available])],
997 [])
998])
999
5232d256
BB		 1000dnl #
1001dnl # 2.6.17 API change
1002dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
1003dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
1004dnl # were exported in 2.6.17 for use by modules which was consistent with
1005dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
1006dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
1007dnl # were dropped entirely leaving modules no way to directly iterate over
1008dnl # the zone list. Because we need access to the zone helpers we check
1009dnl # if the kernel contains the old or new implementation. Then we check
1010dnl # to see if the symbols we need for each version are available. If they
1011dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
1012dnl #
1013AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
1014 AC_MSG_CHECKING([whether symbol *_pgdat exist])
1015 grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
1016 rc=$?
1017 if test $rc -eq 0; then
1018 AC_MSG_RESULT([yes])
1019 AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
1020 else
1021 AC_MSG_RESULT([no])
1022 fi
1023])
1024
d1ff2312 1025dnl #
e11d6c5f
BB		 1026dnl # Proposed API change,
1027dnl # This symbol is not available in stock kernels. You may build a
1028dnl # custom kernel with the *-spl-export-symbols.patch which will export
1029dnl # these symbols for use. If your already rolling a custom kernel for
1030dnl # your environment this is recommended.
36b313da
BB		 1031dnl #
1032AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT], [
1033 SPL_CHECK_SYMBOL_EXPORT(
1034 [first_online_pgdat],
1035 [],
1036 [AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
1037 [first_online_pgdat() is available])],
1038 [])
1039])
1040
1041dnl #
e11d6c5f
BB		 1042dnl # Proposed API change,
1043dnl # This symbol is not available in stock kernels. You may build a
1044dnl # custom kernel with the *-spl-export-symbols.patch which will export
1045dnl # these symbols for use. If your already rolling a custom kernel for
1046dnl # your environment this is recommended.
36b313da
BB		 1047dnl #
1048AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT], [
1049 SPL_CHECK_SYMBOL_EXPORT(
1050 [next_online_pgdat],
1051 [],
1052 [AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
1053 [next_online_pgdat() is available])],
1054 [])
1055])
1056
1057dnl #
e11d6c5f
BB		 1058dnl # Proposed API change,
1059dnl # This symbol is not available in stock kernels. You may build a
1060dnl # custom kernel with the *-spl-export-symbols.patch which will export
1061dnl # these symbols for use. If your already rolling a custom kernel for
1062dnl # your environment this is recommended.
36b313da
BB		 1063dnl #
1064AC_DEFUN([SPL_AC_NEXT_ZONE], [
1065 SPL_CHECK_SYMBOL_EXPORT(
1066 [next_zone],
1067 [],
1068 [AC_DEFINE(HAVE_NEXT_ZONE, 1,
1069 [next_zone() is available])],
1070 [])
1071])
4ab13d3b 1072
5232d256
BB		 1073dnl #
1074dnl # 2.6.17 API change,
1075dnl # See SPL_AC_PGDAT_HELPERS for details.
1076dnl #
1077AC_DEFUN([SPL_AC_PGDAT_LIST], [
1078 SPL_CHECK_SYMBOL_EXPORT(
1079 [pgdat_list],
1080 [],
1081 [AC_DEFINE(HAVE_PGDAT_LIST, 1,
1082 [pgdat_list is available])],
1083 [])
1084])
1085
96dded38
BB		 1086dnl #
1087dnl # 2.6.18 API change,
1088dnl # First introduced global_page_state() support as an inline.
1089dnl #
1090AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
1091 AC_MSG_CHECKING([whether global_page_state() is available])
1092 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1093 #include <linux/mm.h>
96dded38
BB		 1094 ],[
1095 unsigned long state;
6ae7fef5 1096 state = global_page_state(0);
96dded38
BB		 1097 ],[
1098 AC_MSG_RESULT(yes)
1099 AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
1100 [global_page_state() is available])
1101 ],[
1102 AC_MSG_RESULT(no)
1103 ])
1104])
1105
e11d6c5f 1106dnl #
6ae7fef5
BB		 1107dnl # 2.6.21 API change (plus subsequent naming convention changes),
1108dnl # Public global zone stats now include a free page count. However
1109dnl # the enumerated names of the counters have changed since this API
1110dnl # was introduced. We need to deduce the corrent name to use. This
1111dnl # replaces the priviate get_zone_counts() interface.
1112dnl #
1113dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
1114dnl # is 2.6.30 as of when this was written.
e11d6c5f 1115dnl #
6ae7fef5
BB		 1116AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
1117 AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
e11d6c5f 1118 SPL_LINUX_TRY_COMPILE([
6ae7fef5 1119 #include <linux/mm.h>
e11d6c5f 1120 ],[
6ae7fef5
BB		 1121 enum zone_stat_item zsi;
1122 zsi = NR_FREE_PAGES;
e11d6c5f
BB		 1123 ],[
1124 AC_MSG_RESULT(yes)
6ae7fef5
BB		 1125 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
1126 [Page state NR_FREE_PAGES is available])
e11d6c5f
BB		 1127 ],[
1128 AC_MSG_RESULT(no)
1129 ])
1130])
a093c6a4 1131
6ae7fef5
BB		 1132dnl #
1133dnl # 2.6.21 API change (plus subsequent naming convention changes),
1134dnl # Public global zone stats now include an inactive page count. However
1135dnl # the enumerated names of the counters have changed since this API
1136dnl # was introduced. We need to deduce the corrent name to use. This
1137dnl # replaces the priviate get_zone_counts() interface.
1138dnl #
1139dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
1140dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
1141dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
1142dnl #
1143AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
1144 AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
1145 SPL_LINUX_TRY_COMPILE([
1146 #include <linux/mm.h>
1147 ],[
1148 enum zone_stat_item zsi;
1149 zsi = NR_INACTIVE;
1150 ],[
1151 AC_MSG_RESULT(yes)
1152 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
1153 [Page state NR_INACTIVE is available])
1154 ],[
1155 AC_MSG_RESULT(no)
1156 ])
1157
1158 AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
1159 SPL_LINUX_TRY_COMPILE([
1160 #include <linux/mm.h>
1161 ],[
1162 enum zone_stat_item zsi;
1163 zsi = NR_INACTIVE_ANON;
1164 ],[
1165 AC_MSG_RESULT(yes)
1166 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
1167 [Page state NR_INACTIVE_ANON is available])
1168 ],[
1169 AC_MSG_RESULT(no)
1170 ])
1171
1172 AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
1173 SPL_LINUX_TRY_COMPILE([
1174 #include <linux/mm.h>
1175 ],[
1176 enum zone_stat_item zsi;
1177 zsi = NR_INACTIVE_FILE;
1178 ],[
1179 AC_MSG_RESULT(yes)
1180 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
1181 [Page state NR_INACTIVE_FILE is available])
1182 ],[
1183 AC_MSG_RESULT(no)
1184 ])
1185])
1186
1187dnl #
1188dnl # 2.6.21 API change (plus subsequent naming convention changes),
1189dnl # Public global zone stats now include an active page count. However
1190dnl # the enumerated names of the counters have changed since this API
1191dnl # was introduced. We need to deduce the corrent name to use. This
1192dnl # replaces the priviate get_zone_counts() interface.
1193dnl #
1194dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
1195dnl # anonymous and file active pages. As of 2.6.28 it was split in
1196dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
1197dnl #
1198AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
1199 AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
1200 SPL_LINUX_TRY_COMPILE([
1201 #include <linux/mm.h>
1202 ],[
1203 enum zone_stat_item zsi;
1204 zsi = NR_ACTIVE;
1205 ],[
1206 AC_MSG_RESULT(yes)
1207 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
1208 [Page state NR_ACTIVE is available])
1209 ],[
1210 AC_MSG_RESULT(no)
1211 ])
1212
1213 AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
1214 SPL_LINUX_TRY_COMPILE([
1215 #include <linux/mm.h>
1216 ],[
1217 enum zone_stat_item zsi;
1218 zsi = NR_ACTIVE_ANON;
1219 ],[
1220 AC_MSG_RESULT(yes)
1221 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
1222 [Page state NR_ACTIVE_ANON is available])
1223 ],[
1224 AC_MSG_RESULT(no)
1225 ])
1226
1227 AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
1228 SPL_LINUX_TRY_COMPILE([
1229 #include <linux/mm.h>
1230 ],[
1231 enum zone_stat_item zsi;
1232 zsi = NR_ACTIVE_FILE;
1233 ],[
1234 AC_MSG_RESULT(yes)
1235 AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
1236 [Page state NR_ACTIVE_FILE is available])
1237 ],[
1238 AC_MSG_RESULT(no)
1239 ])
1240])
1241
1242dnl #
1243dnl # Proposed API change for legacy kernels.
1244dnl # This symbol is not available in older kernels. For kernels post
1245dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
1246dnl # page state information. This symbol is only used in legacy kernels
1247dnl # any only as a last resort.
1248dnl
1249AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
1250 AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
1251 SPL_LINUX_TRY_COMPILE([
1252 ],[
1253 #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
1254 #error "global_page_state needs NR_FREE_PAGES"
1255 #endif
1256
1257 #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
1258 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
1259 !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
1260 #error "global_page_state needs NR_ACTIVE*"
1261 #endif
1262
1263 #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
1264 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
1265 !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
1266 #error "global_page_state needs NR_INACTIVE*"
1267 #endif
1268 ],[
1269 AC_MSG_RESULT(no)
1270 ],[
1271 AC_MSG_RESULT(yes)
1272 AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
1273 [get_zone_counts() is needed])
1274
1275 SPL_CHECK_SYMBOL_EXPORT(
1276 [get_zone_counts],
1277 [],
1278 [AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
1279 [get_zone_counts() is available])],
1280 [])
1281 ])
1282])
1283
7119bf70
BB		 1284dnl #
1285dnl # 2.6.27 API change,
1286dnl # The user_path_dir() replaces __user_walk()
1287dnl #
1288AC_DEFUN([SPL_AC_USER_PATH_DIR], [
1289 SPL_CHECK_SYMBOL_EXPORT(
1290 [user_path_at],
1291 [],
1292 [AC_DEFINE(HAVE_USER_PATH_DIR, 1,
1293 [user_path_dir() is available])],
1294 [])
1295])
1296
51a727e9
BB		 1297dnl #
1298dnl # Symbol available in RHEL kernels not in stock kernels.
1299dnl #
1300AC_DEFUN([SPL_AC_SET_FS_PWD], [
1301 SPL_CHECK_SYMBOL_EXPORT(
1302 [set_fs_pwd],
1303 [],
1304 [AC_DEFINE(HAVE_SET_FS_PWD, 1,
1305 [set_fs_pwd() is available])],
1306 [])
1307])
1308
1309dnl #
1310dnl # 2.6.25 API change,
1311dnl # Simplied API by replacing mnt+dentry args with a single path arg.
1312dnl #
1313AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
1314 [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
1315 SPL_LINUX_TRY_COMPILE([
1316 #include <linux/sched.h>
baf2979e 1317 #include <linux/fs_struct.h>
51a727e9
BB		 1318 ],[
1319 set_fs_pwd(NULL, NULL);
1320 ],[
1321 AC_MSG_RESULT(yes)
1322 AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
1323 [set_fs_pwd() wants 2 args])
1324 ],[
1325 AC_MSG_RESULT(no)
1326 ])
1327])
1328
a093c6a4
BB		 1329dnl #
1330dnl # SLES API change, never adopted in mainline,
1331dnl # Third 'struct vfsmount *' argument removed.
1332dnl #
1333AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
1334 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
1335 SPL_LINUX_TRY_COMPILE([
1336 #include <linux/fs.h>
1337 ],[
1338 vfs_unlink(NULL, NULL);
1339 ],[
1340 AC_MSG_RESULT(yes)
1341 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
1342 [vfs_unlink() wants 2 args])
1343 ],[
1344 AC_MSG_RESULT(no)
1345 ])
1346])
1347
1348dnl #
1349dnl # SLES API change, never adopted in mainline,
1350dnl # Third and sixth 'struct vfsmount *' argument removed.
1351dnl #
1352AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
1353 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
1354 SPL_LINUX_TRY_COMPILE([
1355 #include <linux/fs.h>
1356 ],[
1357 vfs_rename(NULL, NULL, NULL, NULL);
1358 ],[
1359 AC_MSG_RESULT(yes)
1360 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
1361 [vfs_rename() wants 4 args])
1362 ],[
1363 AC_MSG_RESULT(no)
1364 ])
1365])
ec7d53e9
BB		 1366
1367dnl #
1368dnl # 2.6.29 API change,
1369dnl # check whether 'struct cred' exists
1370dnl #
1371AC_DEFUN([SPL_AC_CRED_STRUCT], [
1372 AC_MSG_CHECKING([whether struct cred exists])
1373 SPL_LINUX_TRY_COMPILE([
1374 #include <linux/cred.h>
1375 ],[
1376 struct cred *cr;
1377 cr = NULL;
1378 ],[
1379 AC_MSG_RESULT(yes)
1380 AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
1381 ],[
1382 AC_MSG_RESULT(no)
1383 ])
1384])
1385
1386dnl #
e811949a 1387dnl # Custom SPL patch may export this symbol.
ec7d53e9
BB		 1388dnl #
1389AC_DEFUN([SPL_AC_GROUPS_SEARCH], [
1390 SPL_CHECK_SYMBOL_EXPORT(
1391 [groups_search],
1392 [],
1393 [AC_DEFINE(HAVE_GROUPS_SEARCH, 1,
1394 [groups_search() is available])],
1395 [])
1396])
e811949a
BB		 1397
1398dnl #
1399dnl # 2.6.x API change,
1400dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
1401dnl #
1402AC_DEFUN([SPL_AC_PUT_TASK_STRUCT], [
1403 SPL_CHECK_SYMBOL_EXPORT(
1404 [__put_task_struct],
1405 [],
1406 [AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
1407 [__put_task_struct() is available])],
1408 [])
1409])
3977f837
BB		 1410
1411dnl #
1412dnl # 2.6.32 API change,
1413dnl # Unused 'struct file *' removed from prototype.
1414dnl #
1415AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
1416 AC_MSG_CHECKING([whether proc_handler() wants 5 args])
1417 SPL_LINUX_TRY_COMPILE([
1418 #include <linux/sysctl.h>
1419 ],[
1420 proc_dostring(NULL, 0, NULL, NULL, NULL);
1421 ],[
1422 AC_MSG_RESULT(yes)
1423 AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
1424 [proc_handler() wants 5 args])
1425 ],[
1426 AC_MSG_RESULT(no)
1427 ])
1428])
b868e22f
BB		 1429
1430dnl #
1431dnl # 2.6.x API change,
1432dnl # kvasprintf() function added.
1433dnl #
1434AC_DEFUN([SPL_AC_KVASPRINTF], [
1435 SPL_CHECK_SYMBOL_EXPORT(
1436 [kvasprintf],
1437 [],
1438 [AC_DEFINE(HAVE_KVASPRINTF, 1,
1439 [kvasprintf() is available])],
1440 [])
1441])
f0ff89fc
BB		 1442
1443dnl #
1444dnl # 2.6.35 API change,
1445dnl # Unused 'struct dentry *' removed from prototype.
1446dnl #
1447AC_DEFUN([SPL_AC_3ARGS_FILE_FSYNC], [
1448 AC_MSG_CHECKING([whether file_fsync() wants 3 args])
1449 SPL_LINUX_TRY_COMPILE([
1450 #include <linux/buffer_head.h>
1451 ],[
1452 file_fsync(NULL, NULL, 0);
1453 ],[
1454 AC_MSG_RESULT(yes)
1455 AC_DEFINE(HAVE_3ARGS_FILE_FSYNC, 1,
1456 [file_fsync() wants 3 args])
1457 ],[
1458 AC_MSG_RESULT(no)
1459 ])
1460])
mirror of SPL module used by << 0.8.x ZFSOnLinux