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1 | AC_DEFUN([SPL_AC_KERNEL], [ |
2 | ver=`uname -r` | |
3 | ||
4 | AC_ARG_WITH([linux], | |
5 | AS_HELP_STRING([--with-linux=PATH], | |
6 | [Path to kernel source]), | |
7 | [kernelsrc="$withval"; kernelbuild="$withval"]) | |
8 | ||
9 | AC_ARG_WITH([linux-obj], | |
10 | AS_HELP_STRING([--with-linux-obj=PATH], | |
11 | [Path to kernel build objects]), | |
12 | [kernelbuild="$withval"]) | |
13 | ||
14 | AC_MSG_CHECKING([kernel source directory]) | |
15 | if test -z "$kernelsrc"; then | |
16 | kernelbuild= | |
17 | sourcelink=/lib/modules/${ver}/source | |
18 | buildlink=/lib/modules/${ver}/build | |
19 | ||
20 | if test -e $sourcelink; then | |
21 | kernelsrc=`(cd $sourcelink; /bin/pwd)` | |
22 | fi | |
23 | if test -e $buildlink; then | |
24 | kernelbuild=`(cd $buildlink; /bin/pwd)` | |
25 | fi | |
26 | if test -z "$kernelsrc"; then | |
27 | kernelsrc=$kernelbuild | |
28 | fi | |
29 | if test -z "$kernelsrc" -o -z "$kernelbuild"; then | |
30 | AC_MSG_RESULT([Not found]) | |
31 | AC_MSG_ERROR([ | |
32 | *** Please specify the location of the kernel source | |
33 | *** with the '--with-kernel=PATH' option]) | |
34 | fi | |
35 | fi | |
36 | ||
37 | AC_MSG_RESULT([$kernelsrc]) | |
38 | AC_MSG_CHECKING([kernel build directory]) | |
39 | AC_MSG_RESULT([$kernelbuild]) | |
40 | ||
41 | AC_MSG_CHECKING([kernel source version]) | |
42 | if test -r $kernelbuild/include/linux/version.h && | |
43 | fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then | |
44 | ||
45 | kernsrcver=`(echo "#include <linux/version.h>"; | |
46 | echo "kernsrcver=UTS_RELEASE") | | |
47 | cpp -I $kernelbuild/include | | |
48 | grep "^kernsrcver=" | cut -d \" -f 2` | |
49 | ||
50 | elif test -r $kernelbuild/include/linux/utsrelease.h && | |
51 | fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then | |
52 | ||
53 | kernsrcver=`(echo "#include <linux/utsrelease.h>"; | |
54 | echo "kernsrcver=UTS_RELEASE") | | |
55 | cpp -I $kernelbuild/include | | |
56 | grep "^kernsrcver=" | cut -d \" -f 2` | |
57 | fi | |
58 | ||
59 | if test -z "$kernsrcver"; then | |
60 | AC_MSG_RESULT([Not found]) | |
61 | AC_MSG_ERROR([ | |
62 | *** Cannot determine the version of the linux kernel source. | |
63 | *** Please prepare the kernel before running this script]) | |
64 | fi | |
65 | ||
66 | AC_MSG_RESULT([$kernsrcver]) | |
67 | ||
68 | kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver | |
69 | LINUX=${kernelsrc} | |
70 | LINUX_OBJ=${kernelbuild} | |
71 | ||
72 | AC_SUBST(LINUX) | |
73 | AC_SUBST(LINUX_OBJ) | |
74 | AC_SUBST(kmoduledir) | |
75 | ]) | |
76 | ||
77 | AC_DEFUN([SPL_AC_DEBUG], [ | |
78 | AC_MSG_CHECKING([whether debugging is enabled]) | |
79 | AC_ARG_ENABLE( [debug], | |
80 | AS_HELP_STRING([--enable-debug], | |
81 | [Enable generic debug support (default off)]), | |
82 | [ case "$enableval" in | |
83 | yes) spl_ac_debug=yes ;; | |
84 | no) spl_ac_debug=no ;; | |
85 | *) AC_MSG_RESULT([Error!]) | |
86 | AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;; | |
87 | esac ] | |
88 | ) | |
89 | if test "$spl_ac_debug" = yes; then | |
90 | KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG" | |
91 | else | |
92 | KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG" | |
93 | AC_DEFINE([NDEBUG], [1], | |
94 | [Define to 1 to disable debug tracing]) | |
95 | fi | |
96 | AC_MSG_RESULT([${spl_ac_debug=no}]) | |
97 | ]) | |
98 | ||
99 | AC_DEFUN([SPL_AC_DEBUG_KMEM], [ | |
100 | AC_MSG_CHECKING([whether kmem debugging is enabled]) | |
101 | AC_ARG_ENABLE( [debug-kmem], | |
102 | AS_HELP_STRING([--enable-debug-kmem], | |
103 | [Enable kmem debug support (default off)]), | |
104 | [ case "$enableval" in | |
105 | yes) spl_ac_debug=yes ;; | |
106 | no) spl_ac_debug=no ;; | |
107 | *) AC_MSG_RESULT([Error!]) | |
108 | AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kmem]) ;; | |
109 | esac ] | |
110 | ) | |
111 | if test "$spl_ac_debug" = yes; then | |
112 | KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM" | |
113 | AC_DEFINE([DEBUG_KMEM], [1], | |
114 | [Define to 1 to enable kmem debugging]) | |
115 | fi | |
116 | AC_MSG_RESULT([${spl_ac_debug=no}]) | |
117 | ]) | |
118 | ||
119 | AC_DEFUN([SPL_AC_DEBUG_MUTEX], [ | |
120 | AC_MSG_CHECKING([whether mutex debugging is enabled]) | |
121 | AC_ARG_ENABLE( [debug-mutex], | |
122 | AS_HELP_STRING([--enable-debug-mutex], | |
123 | [Enable mutex debug support (default off)]), | |
124 | [ case "$enableval" in | |
125 | yes) spl_ac_debug=yes ;; | |
126 | no) spl_ac_debug=no ;; | |
127 | *) AC_MSG_RESULT([Error!]) | |
128 | AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-mutex]) ;; | |
129 | esac ] | |
130 | ) | |
131 | if test "$spl_ac_debug" = yes; then | |
132 | KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_MUTEX" | |
133 | AC_DEFINE([DEBUG_MUTEX], [1], | |
134 | [Define to 1 to enable mutex debugging]) | |
135 | fi | |
136 | AC_MSG_RESULT([${spl_ac_debug=no}]) | |
137 | ]) | |
138 | ||
139 | AC_DEFUN([SPL_AC_DEBUG_KSTAT], [ | |
140 | AC_MSG_CHECKING([whether kstat debugging is enabled]) | |
141 | AC_ARG_ENABLE( [debug-kstat], | |
142 | AS_HELP_STRING([--enable-debug-kstat], | |
143 | [Enable kstat debug support (default off)]), | |
144 | [ case "$enableval" in | |
145 | yes) spl_ac_debug=yes ;; | |
146 | no) spl_ac_debug=no ;; | |
147 | *) AC_MSG_RESULT([Error!]) | |
148 | AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kstat]) ;; | |
149 | esac ] | |
150 | ) | |
151 | if test "$spl_ac_debug" = yes; then | |
152 | KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KSTAT" | |
153 | AC_DEFINE([DEBUG_KSTAT], [1], | |
154 | [Define to 1 to enable kstat debugging]) | |
155 | fi | |
156 | AC_MSG_RESULT([${spl_ac_debug=no}]) | |
157 | ]) | |
158 | ||
159 | AC_DEFUN([SPL_AC_DEBUG_CALLB], [ | |
160 | AC_MSG_CHECKING([whether callb debugging is enabled]) | |
161 | AC_ARG_ENABLE( [debug-callb], | |
162 | AS_HELP_STRING([--enable-debug-callb], | |
163 | [Enable callb debug support (default off)]), | |
164 | [ case "$enableval" in | |
165 | yes) spl_ac_debug=yes ;; | |
166 | no) spl_ac_debug=no ;; | |
167 | *) AC_MSG_RESULT([Error!]) | |
168 | AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-callb]) ;; | |
169 | esac ] | |
170 | ) | |
171 | if test "$spl_ac_debug" = yes; then | |
172 | KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_CALLB" | |
173 | AC_DEFINE([DEBUG_CALLB], [1], | |
174 | [Define to 1 to enable callb debugging]) | |
175 | fi | |
176 | AC_MSG_RESULT([${spl_ac_debug=no}]) | |
177 | ]) | |
178 | ||
179 | dnl # | |
180 | dnl # SPL_LINUX_CONFTEST | |
181 | dnl # | |
182 | AC_DEFUN([SPL_LINUX_CONFTEST], [ | |
183 | cat >conftest.c <<_ACEOF | |
184 | $1 | |
185 | _ACEOF | |
186 | ]) | |
187 | ||
188 | dnl # | |
189 | dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY]) | |
190 | dnl # | |
191 | m4_define([SPL_LANG_PROGRAM], [ | |
192 | $1 | |
193 | int | |
194 | main (void) | |
195 | { | |
196 | dnl Do *not* indent the following line: there may be CPP directives. | |
197 | dnl Don't move the `;' right after for the same reason. | |
198 | $2 | |
199 | ; | |
200 | return 0; | |
201 | } | |
202 | ]) | |
203 | ||
204 | dnl # | |
205 | dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE | |
206 | dnl # | |
207 | AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [ | |
208 | m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])dnl | |
209 | rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile | |
210 | echo "obj-m := conftest.o" >build/Makefile | |
211 | dnl AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM SUBDIRS=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])], | |
212 | AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])], | |
213 | [$4], | |
214 | [_AC_MSG_LOG_CONFTEST | |
215 | m4_ifvaln([$5],[$5])dnl])dnl | |
216 | rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko m4_ifval([$1], [build/conftest.c conftest.c])[]dnl | |
217 | ]) | |
218 | ||
219 | dnl # | |
220 | dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE | |
221 | dnl # | |
222 | AC_DEFUN([SPL_LINUX_TRY_COMPILE], | |
223 | [SPL_LINUX_COMPILE_IFELSE( | |
224 | [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])], | |
225 | [modules], | |
226 | [test -s build/conftest.o], | |
227 | [$3], [$4]) | |
228 | ]) | |
229 | ||
230 | dnl # | |
231 | dnl # SPL_LINUX_CONFIG | |
232 | dnl # | |
233 | AC_DEFUN([SPL_LINUX_CONFIG], | |
234 | [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1]) | |
235 | SPL_LINUX_TRY_COMPILE([ | |
236 | #ifndef AUTOCONF_INCLUDED | |
237 | #include <linux/config.h> | |
238 | #endif | |
239 | ],[ | |
240 | #ifndef CONFIG_$1 | |
241 | #error CONFIG_$1 not #defined | |
242 | #endif | |
243 | ],[ | |
244 | AC_MSG_RESULT([yes]) | |
245 | $2 | |
246 | ],[ | |
247 | AC_MSG_RESULT([no]) | |
248 | $3 | |
249 | ]) | |
250 | ]) | |
251 | ||
252 | dnl # | |
253 | dnl # SPL_CHECK_SYMBOL_EXPORT | |
254 | dnl # check symbol exported or not | |
255 | dnl # | |
256 | AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], | |
257 | [AC_MSG_CHECKING([whether symbol $1 is exported]) | |
258 | grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null | |
259 | rc=$? | |
260 | if test $rc -ne 0; then | |
261 | export=0 | |
262 | for file in $2; do | |
263 | grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null | |
264 | rc=$? | |
265 | if test $rc -eq 0; then | |
266 | export=1 | |
267 | break; | |
268 | fi | |
269 | done | |
270 | if test $export -eq 0; then | |
271 | AC_MSG_RESULT([no]) | |
272 | $4 | |
273 | else | |
274 | AC_MSG_RESULT([yes]) | |
275 | $3 | |
276 | fi | |
277 | else | |
278 | AC_MSG_RESULT([yes]) | |
279 | $3 | |
280 | fi | |
281 | ]) | |
282 | ||
283 | dnl # | |
284 | dnl # 2.6.x API change | |
285 | dnl # check if uintptr_t typedef is defined | |
286 | dnl # | |
287 | AC_DEFUN([SPL_AC_TYPE_UINTPTR_T], | |
288 | [AC_MSG_CHECKING([whether kernel defines uintptr_t]) | |
289 | SPL_LINUX_TRY_COMPILE([ | |
290 | #include <linux/types.h> | |
291 | ],[ | |
292 | uintptr_t *ptr; | |
293 | ],[ | |
294 | AC_MSG_RESULT([yes]) | |
295 | AC_DEFINE(HAVE_UINTPTR_T, 1, | |
296 | [kernel defines uintptr_t]) | |
297 | ],[ | |
298 | AC_MSG_RESULT([no]) | |
299 | ]) | |
300 | ]) | |
301 | ||
302 | dnl # | |
303 | dnl # 2.6.x API change | |
304 | dnl # check if kmem_cache_t typedef is defined | |
305 | dnl # | |
306 | AC_DEFUN([SPL_AC_TYPE_KMEM_CACHE_T], | |
307 | [AC_MSG_CHECKING([whether kernel defines kmem_cache_t]) | |
308 | SPL_LINUX_TRY_COMPILE([ | |
309 | #include <linux/slab.h> | |
310 | ],[ | |
311 | kmem_cache_t *cache; | |
312 | ],[ | |
313 | AC_MSG_RESULT([yes]) | |
314 | AC_DEFINE(HAVE_KMEM_CACHE_T, 1, | |
315 | [kernel defines kmem_cache_t]) | |
316 | ],[ | |
317 | AC_MSG_RESULT([no]) | |
318 | ]) | |
319 | ]) | |
320 | ||
321 | dnl # | |
322 | dnl # 2.6.19 API change | |
323 | dnl # kmem_cache_destroy() return void instead of int | |
324 | dnl # | |
325 | AC_DEFUN([SPL_AC_KMEM_CACHE_DESTROY_INT], | |
326 | [AC_MSG_CHECKING([whether kmem_cache_destroy() returns int]) | |
327 | SPL_LINUX_TRY_COMPILE([ | |
328 | #include <linux/slab.h> | |
329 | ],[ | |
330 | int i = kmem_cache_destroy(NULL); | |
331 | ],[ | |
332 | AC_MSG_RESULT(yes) | |
333 | AC_DEFINE(HAVE_KMEM_CACHE_DESTROY_INT, 1, | |
334 | [kmem_cache_destroy() returns int]) | |
335 | ],[ | |
336 | AC_MSG_RESULT(no) | |
337 | ]) | |
338 | ]) | |
339 | ||
340 | dnl # | |
341 | dnl # 2.6.19 API change | |
342 | dnl # panic_notifier_list use atomic_notifier operations | |
343 | dnl # | |
344 | ||
345 | AC_DEFUN([SPL_AC_ATOMIC_PANIC_NOTIFIER], | |
346 | [AC_MSG_CHECKING([whether panic_notifier_list is atomic]) | |
347 | SPL_LINUX_TRY_COMPILE([ | |
348 | #include <linux/notifier.h> | |
349 | #include <linux/kernel.h> | |
350 | ],[ | |
351 | struct atomic_notifier_head panic_notifier_list; | |
352 | ],[ | |
353 | AC_MSG_RESULT(yes) | |
354 | AC_DEFINE(HAVE_ATOMIC_PANIC_NOTIFIER, 1, | |
355 | [panic_notifier_list is atomic]) | |
356 | ],[ | |
357 | AC_MSG_RESULT(no) | |
358 | ]) | |
359 | ]) | |
360 | ||
361 | dnl # | |
362 | dnl # 2.6.20 API change | |
363 | dnl # INIT_WORK use 2 args and not store data inside | |
364 | dnl # | |
365 | AC_DEFUN([SPL_AC_3ARGS_INIT_WORK], | |
366 | [AC_MSG_CHECKING([whether INIT_WORK wants 3 args]) | |
367 | SPL_LINUX_TRY_COMPILE([ | |
368 | #include <linux/workqueue.h> | |
369 | ],[ | |
370 | struct work_struct work; | |
371 | ||
372 | INIT_WORK(&work, NULL, NULL); | |
373 | ],[ | |
374 | AC_MSG_RESULT(yes) | |
375 | AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1, | |
376 | [INIT_WORK wants 3 args]) | |
377 | ],[ | |
378 | AC_MSG_RESULT(no) | |
379 | ]) | |
380 | ]) | |
381 | ||
382 | dnl # | |
383 | dnl # 2.6.21 api change. | |
384 | dnl # 'register_sysctl_table' use only one argument instead of two | |
385 | dnl # | |
386 | AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL], | |
387 | [AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args]) | |
388 | SPL_LINUX_TRY_COMPILE([ | |
389 | #include <linux/sysctl.h> | |
390 | ],[ | |
391 | return register_sysctl_table(NULL,0); | |
392 | ],[ | |
393 | AC_MSG_RESULT(yes) | |
394 | AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1, | |
395 | [register_sysctl_table() wants 2 args]) | |
396 | ],[ | |
397 | AC_MSG_RESULT(no) | |
398 | ]) | |
399 | ]) | |
400 | ||
401 | dnl # | |
402 | dnl # 2.6.21 API change | |
403 | dnl # Use struct kmem_cache for missing kmem_cache_t | |
404 | dnl # | |
405 | AC_DEFUN([SPL_AC_KMEM_CACHE_T], [ | |
406 | AC_MSG_CHECKING([whether kernel has kmem_cache_t]) | |
407 | tmp_flags="$EXTRA_KCFLAGS" | |
408 | EXTRA_KCFLAGS="-Werror" | |
409 | SPL_LINUX_TRY_COMPILE([ | |
410 | #include <linux/slab.h> | |
411 | ],[ | |
412 | kmem_cache_t *cachep = NULL; | |
413 | kmem_cache_free(cachep, NULL); | |
414 | ||
415 | ],[ | |
416 | AC_MSG_RESULT([yes]) | |
417 | AC_DEFINE(HAVE_KMEM_CACHE_T, 1, | |
418 | [kernel has struct kmem_cache_t]) | |
419 | ],[ | |
420 | AC_MSG_RESULT([no]) | |
421 | ]) | |
422 | EXTRA_KCFLAGS="$tmp_flags" | |
423 | ]) | |
424 | ||
425 | dnl # | |
426 | dnl # 2.6.23 API change | |
427 | dnl # Slab no longer accepts a dtor argument | |
428 | dnl # | |
429 | AC_DEFUN([SPL_AC_KMEM_CACHE_CREATE_DTOR], | |
430 | [AC_MSG_CHECKING([whether kmem_cache_create() has dtor arg]) | |
431 | SPL_LINUX_TRY_COMPILE([ | |
432 | #include <linux/slab.h> | |
433 | ],[ | |
434 | kmem_cache_create(NULL, 0, 0, 0, NULL, NULL); | |
435 | ],[ | |
436 | AC_MSG_RESULT(yes) | |
437 | AC_DEFINE(HAVE_KMEM_CACHE_CREATE_DTOR, 1, | |
438 | [kmem_cache_create() has dtor arg]) | |
439 | ],[ | |
440 | AC_MSG_RESULT(no) | |
441 | ]) | |
442 | ]) | |
443 | ||
444 | dnl # | |
445 | dnl # 2.6.x API change | |
446 | dnl # Slab ctor no longer takes 3 args | |
447 | dnl # | |
448 | AC_DEFUN([SPL_AC_3ARG_KMEM_CACHE_CREATE_CTOR], | |
449 | [AC_MSG_CHECKING([whether slab ctor wants 3 args]) | |
450 | tmp_flags="$EXTRA_KCFLAGS" | |
451 | EXTRA_KCFLAGS="-Werror" | |
452 | SPL_LINUX_TRY_COMPILE([ | |
453 | #include <linux/slab.h> | |
454 | ],[ | |
455 | void (*ctor)(void *,struct kmem_cache *,unsigned long) = NULL; | |
456 | ||
457 | #ifdef HAVE_KMEM_CACHE_CREATE_DTOR | |
458 | kmem_cache_create(NULL, 0, 0, 0, ctor, NULL); | |
459 | #else | |
460 | kmem_cache_create(NULL, 0, 0, 0, ctor); | |
461 | #endif | |
462 | ],[ | |
463 | AC_MSG_RESULT(yes) | |
464 | AC_DEFINE(HAVE_3ARG_KMEM_CACHE_CREATE_CTOR, 1, | |
465 | [slab ctor wants 3 args]) | |
466 | ],[ | |
467 | AC_MSG_RESULT(no) | |
468 | ]) | |
469 | EXTRA_KCFLAGS="$tmp_flags" | |
470 | ]) | |
471 | ||
472 | dnl # | |
473 | dnl # 2.6.x API change | |
474 | dnl # Old set_shrinker API replaced with register_shrinker | |
475 | dnl # | |
476 | AC_DEFUN([SPL_AC_SET_SHRINKER], [ | |
477 | AC_MSG_CHECKING([whether set_shrinker() available]) | |
478 | SPL_LINUX_TRY_COMPILE([ | |
479 | #include <linux/mm.h> | |
480 | ],[ | |
481 | return set_shrinker(DEFAULT_SEEKS, NULL); | |
482 | ],[ | |
483 | AC_MSG_RESULT([yes]) | |
484 | AC_DEFINE(HAVE_SET_SHRINKER, 1, | |
485 | [set_shrinker() available]) | |
486 | ],[ | |
487 | AC_MSG_RESULT([no]) | |
488 | ]) | |
489 | ]) | |
490 | ||
491 | dnl # | |
492 | dnl # 2.6.x API change | |
493 | dnl # struct path entry added to struct nameidata | |
494 | dnl # | |
495 | AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA], | |
496 | [AC_MSG_CHECKING([whether struct path used in struct nameidata]) | |
497 | SPL_LINUX_TRY_COMPILE([ | |
498 | #include <linux/namei.h> | |
499 | ],[ | |
500 | struct nameidata nd; | |
501 | ||
502 | nd.path.mnt = NULL; | |
503 | nd.path.dentry = NULL; | |
504 | ],[ | |
505 | AC_MSG_RESULT(yes) | |
506 | AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1, | |
507 | [struct path used in struct nameidata]) | |
508 | ],[ | |
509 | AC_MSG_RESULT(no) | |
510 | ]) | |
511 | ]) | |
512 | ||
513 | dnl # | |
514 | dnl # Custom SPL patch may export this system it is not required | |
515 | dnl # | |
516 | AC_DEFUN([SPL_AC_TASK_CURR], [ | |
517 | SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c], | |
518 | [AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])], | |
519 | []) | |
520 | ]) | |
521 | ||
522 | dnl # | |
523 | dnl # 2.6.x API change | |
524 | dnl # Use CTL_UNNUMBERED when binary sysctl is not required | |
525 | dnl # | |
526 | AC_DEFUN([SPL_AC_CTL_UNNUMBERED], | |
527 | [AC_MSG_CHECKING([whether unnumbered sysctl support exists]) | |
528 | SPL_LINUX_TRY_COMPILE([ | |
529 | #include <linux/sysctl.h> | |
530 | ],[ | |
531 | #ifndef CTL_UNNUMBERED | |
532 | #error CTL_UNNUMBERED undefined | |
533 | #endif | |
534 | ],[ | |
535 | AC_MSG_RESULT(yes) | |
536 | AC_DEFINE(HAVE_CTL_UNNUMBERED, 1, | |
537 | [unnumbered sysctl support exists]) | |
538 | ],[ | |
539 | AC_MSG_RESULT(no) | |
540 | ]) | |
541 | ]) |