X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=build%2Fautoconf%2Flustre-build-linux.m4;h=f26375d1a3ecd800bef2826c8570098012880be4;hp=5c5dc95ad228d23f799cb2df0677c4670fbd15f4;hb=99293c489dc2330bbb8ce3734f575003d4812811;hpb=7b16772ac5bd3a3e0b5c7c52d96f261be9b22263 diff --git a/build/autoconf/lustre-build-linux.m4 b/build/autoconf/lustre-build-linux.m4 index 5c5dc95..f26375d 100644 --- a/build/autoconf/lustre-build-linux.m4 +++ b/build/autoconf/lustre-build-linux.m4 @@ -4,7 +4,7 @@ # Set things accordingly for a 2.5 kernel # AC_DEFUN([LB_LINUX_VERSION], -[AC_CHECK_FILE([$LINUX/include/linux/namei.h], +[LB_CHECK_FILE([$LINUX/include/linux/namei.h], [ linux25="yes" KMODEXT=".ko" @@ -26,17 +26,23 @@ if test $linux25 = "yes" ; then [ AC_MSG_RESULT([no]) ],[ - AC_MSG_RESULT([yes]) makerule="_module_$makerule" MODULE_TARGET="M" + LB_LINUX_TRY_MAKE([],[], + [$makerule LUSTRE_KERNEL_TEST=conftest.i], + [test -s build/conftest.i], + [ + AC_MSG_RESULT([yes]) + ],[ + AC_MSG_ERROR([unknown; check config.log for details]) + ]) ]) - else makerule="_dir_$PWD/build" fi AC_SUBST(MODULE_TARGET) -AC_SUBST(LINUX25) +AC_SUBST(linux25) AC_SUBST(KMODEXT) ]) @@ -49,8 +55,13 @@ AC_DEFUN([LB_LINUX_RELEASE], [LINUXRELEASE= rm -f build/conftest.i AC_MSG_CHECKING([for Linux release]) +if test -s $LINUX_OBJ/include/linux/utsrelease.h ; then + LINUXRELEASEHEADER=utsrelease.h +else + LINUXRELEASEHEADER=version.h +fi LB_LINUX_TRY_MAKE([ - #include + #include ],[ char *LINUXRELEASE; LINUXRELEASE=UTS_RELEASE; @@ -90,6 +101,7 @@ AC_SUBST(RELEASE) ]) # +# # LB_LINUX_PATH # # Find paths for linux, handling kernel-source rpms @@ -104,6 +116,10 @@ AC_ARG_WITH([linux], AC_MSG_RESULT([$LINUX]) AC_SUBST(LINUX) +# -------- check for linux -------- +LB_CHECK_FILE([$LINUX],[], + [AC_MSG_ERROR([Kernel source $LINUX could not be found.])]) + # -------- linux objects (for 2.6) -- AC_MSG_CHECKING([for Linux objects dir]) AC_ARG_WITH([linux-obj], @@ -114,7 +130,7 @@ AC_ARG_WITH([linux-obj], AC_MSG_RESULT([$LINUX_OBJ]) AC_SUBST(LINUX_OBJ) -# -------- check for .confg -------- +# -------- check for .config -------- AC_ARG_WITH([linux-config], [AC_HELP_STRING([--with-linux-config=path], [set path to Linux .conf (default=$LINUX_OBJ/.config)])], @@ -122,24 +138,27 @@ AC_ARG_WITH([linux-config], [LINUX_CONFIG=$LINUX_OBJ/.config]) AC_SUBST(LINUX_CONFIG) -AC_CHECK_FILE([/boot/kernel.h], +LB_CHECK_FILE([/boot/kernel.h], [KERNEL_SOURCE_HEADER='/boot/kernel.h'], - [AC_CHECK_FILE([/var/adm/running-kernel.h]), - [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h']]) + [LB_CHECK_FILE([/var/adm/running-kernel.h], + [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])]) AC_ARG_WITH([kernel-source-header], AC_HELP_STRING([--with-kernel-source-header=path], - [Use a different kernel version header. Consult README.kernel-source for details.]), + [Use a different kernel version header. Consult build/README.kernel-source for details.]), [KERNEL_SOURCE_HEADER=$with_kernel_source_header]) # ------------ .config exists ---------------- -AC_CHECK_FILE([$LINUX_CONFIG],[], - [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult README.kernel-source])]) +LB_CHECK_FILE([$LINUX_CONFIG],[], + [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])]) # ----------- make dep run? ------------------ -AC_CHECK_FILES([$LINUX_OBJ/include/linux/autoconf.h +# at 2.6.19 # $LINUX/include/linux/config.h is removed +# and at more old has only one line +# include +LB_CHECK_FILES([$LINUX_OBJ/include/linux/autoconf.h $LINUX_OBJ/include/linux/version.h - $LINUX/include/linux/config.h],[], + ],[], [AC_MSG_ERROR([Run make config in $LINUX.])]) # ------------ rhconfig.h includes runtime-generated bits -- @@ -153,17 +172,18 @@ if grep rhconfig $LINUX_OBJ/include/linux/version.h >/dev/null ; then # This is a clean kernel-source tree, we need to # enable extensive workarounds to get this to build # modules - AC_CHECK_FILE([$KERNEL_SOURCE_HEADER], + LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.]) AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.]) - AC_MSG_WARN([Consult README.kernel-source for details.]) + AC_MSG_WARN([Consult build/README.kernel-source for details.]) fi], - [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult README.kernel-source for details.])]) + [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])]) EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS" fi # this is needed before we can build modules +LB_LINUX_UML LB_LINUX_VERSION # --- check that we can build modules at all @@ -173,11 +193,49 @@ LB_LINUX_TRY_COMPILE([],[],[ ],[ AC_MSG_RESULT([no]) AC_MSG_WARN([Consult config.log for details.]) - AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult README.kernel-source]) - AC_MSG_ERROR([Kernel modules could not be built.]) + AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source]) + AC_MSG_ERROR([Kernel modules cannot be built.]) ]) LB_LINUX_RELEASE +]) # end of LB_LINUX_PATH + +# +# +# LB_LINUX_MODPOST +# +# Find modpost and check it +# +AC_DEFUN([LB_LINUX_MODPOST], +[ +# Find the modpost utility +AC_CHECK_FILE([$LINUX_OBJ/scripts/mod/modpost], + [MODPOST=$LINUX_OBJ/scripts/mod/modpost], + [AC_CHECK_FILE([$LINUX_OBJ/scripts/modpost], + [MODPOST=$LINUX_OBJ/scripts/modpost], + AC_MSG_ERROR([modpost not found.]) + )] +) +AC_SUBST(MODPOST) + +# Ensure it can run +AC_MSG_CHECKING([if modpost can be run]) +if $MODPOST ; then + AC_MSG_RESULT([yes]) +else + AC_MSG_ERROR([modpost can not be run.]) +fi + +# Check if modpost supports (and therefore requires) -m +AC_MSG_CHECKING([if modpost supports -m]) +if $MODPOST -m 2>/dev/null ; then + AC_MSG_RESULT([yes]) + MODPOST_ARGS=-m +else + AC_MSG_RESULT([no]) + MODPOST_ARGS="" +fi +AC_SUBST(MODPOST_ARGS) ]) # @@ -220,6 +278,21 @@ $1 _ACEOF ]) + +# LB_LANG_PROGRAM(C)([PROLOGUE], [BODY]) +# -------------------------------------- +m4_define([LB_LANG_PROGRAM], +[$1 +int +main (void) +{ +dnl Do *not* indent the following line: there may be CPP directives. +dnl Don't move the `;' right after for the same reason. +$2 + ; + return 0; +}]) + # # LB_LINUX_COMPILE_IFELSE # @@ -228,7 +301,7 @@ _ACEOF AC_DEFUN([LB_LINUX_COMPILE_IFELSE], [m4_ifvaln([$1], [LB_LINUX_CONFTEST([$1])])dnl rm -f build/conftest.o build/conftest.mod.c build/conftest.ko -AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])], +AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="$EXTRA_LNET_INCLUDE -I$LINUX/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 -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 $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])], [$4], [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])dnl])dnl @@ -236,13 +309,28 @@ rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest. ]) # +# LB_LINUX_ARCH +# +# Determine the kernel's idea of the current architecture +# +AC_DEFUN([LB_LINUX_ARCH], + [AC_MSG_CHECKING([Linux kernel architecture]) + AS_IF([rm -f $PWD/build/arch + make -s --no-print-directory echoarch -f $PWD/build/Makefile \ + LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX_OBJ $ARCH_UM \ + ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`], + [AC_MSG_RESULT([$LINUX_ARCH])], + [AC_MSG_ERROR([Could not determine the kernel architecture.])]) + rm -f build/arch]) + +# # LB_LINUX_TRY_COMPILE # # like AC_TRY_COMPILE # AC_DEFUN([LB_LINUX_TRY_COMPILE], [LB_LINUX_COMPILE_IFELSE( - [AC_LANG_PROGRAM([[$1]], [[$2]])], + [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])], [modules], [test -s build/conftest.o], [$3], [$4])]) @@ -254,7 +342,9 @@ AC_DEFUN([LB_LINUX_TRY_COMPILE], # AC_DEFUN([LB_LINUX_CONFIG], [AC_MSG_CHECKING([if Linux was built with CONFIG_$1]) -LB_LINUX_TRY_COMPILE([#include ],[ +LB_LINUX_TRY_COMPILE([ +#include +],[ #ifndef CONFIG_$1 #error CONFIG_$1 not #defined #endif @@ -268,12 +358,55 @@ $3 ]) # +# LB_LINUX_CONFIG_IM +# +# check if a given config option is builtin or as module +# +AC_DEFUN([LB_LINUX_CONFIG_IM], +[AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module]) +LB_LINUX_TRY_COMPILE([ +#include +],[ +#if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE)) +#error CONFIG_$1 and CONFIG_$1_MODULE not #defined +#endif +],[ +AC_MSG_RESULT([yes]) +$2 +],[ +AC_MSG_RESULT([no]) +$3 +]) +]) + +# # LB_LINUX_TRY_MAKE # # like LB_LINUX_TRY_COMPILE, but with different arguments # AC_DEFUN([LB_LINUX_TRY_MAKE], -[LB_LINUX_COMPILE_IFELSE([AC_LANG_PROGRAM([[$1]], [[$2]])], [$3], [$4], [$5], [$6])]) +[LB_LINUX_COMPILE_IFELSE([AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])], [$3], [$4], [$5], [$6])]) + +# +# LB_LINUX_CONFIG_BIG_STACK +# +# check for big stack patch +# +AC_DEFUN([LB_LINUX_CONFIG_BIG_STACK], +[if test "x$ARCH_UM" = "x" -a "x$linux25" = "xno" ; then + case $target_cpu in + i?86 | x86_64) + LB_LINUX_CONFIG([STACK_SIZE_16KB],[],[ + LB_LINUX_CONFIG([STACK_SIZE_32KB],[],[ + LB_LINUX_CONFIG([STACK_SIZE_64KB],[],[ + AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 16KB stack.]) + ]) + ]) + ]) + ;; + esac +fi +]) # # LB_PROG_LINUX @@ -282,7 +415,6 @@ AC_DEFUN([LB_LINUX_TRY_MAKE], # AC_DEFUN([LB_PROG_LINUX], [LB_LINUX_PATH -LB_LINUX_UML LB_LINUX_CONFIG([MODULES],[],[ AC_MSG_ERROR([module support is required to build Lustre kernel modules.]) @@ -300,11 +432,14 @@ if test "x$ARCH_UM" = "x" ; then fi ]) -# Portals tests -LP_PROG_LINUX +LB_LINUX_CONFIG([KMOD],[],[ + AC_MSG_WARN([]) + AC_MSG_WARN([Kernel module loading support is highly recommended.]) + AC_MSG_WARN([]) +]) + +#LB_LINUX_CONFIG_BIG_STACK -# Lustre tests -LC_PROG_LINUX ]) # @@ -313,275 +448,43 @@ LC_PROG_LINUX # AM_CONDITIONALS for linux # AC_DEFUN([LB_LINUX_CONDITIONALS], -[AM_CONDITIONAL(INKERNEL, test x$enable_inkernel = xyes) -AM_CONDITIONAL(LINUX25, test x$linux25 = xyes) -]) - -# -# LB_LINUX_STRUCT_PAGE_LIST -# -# 2.6.4 no longer has page->list -# -AC_DEFUN([LB_LINUX_STRUCT_PAGE_LIST], -[AC_MSG_CHECKING([if struct page has a list field]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - struct page page; - &page.list; -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_PAGE_LIST, 1, [struct page has a list field]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_STRUCT_SIGHAND -# -# red hat 2.4 adds sighand to struct task_struct -# -AC_DEFUN([LB_LINUX_STRUCT_SIGHAND], -[AC_MSG_CHECKING([if task_struct has a sighand field]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - struct task_struct p; - p.sighand = NULL; -],[ - AC_DEFINE(CONFIG_RH_2_4_20, 1, [this kernel contains Red Hat 2.4.20 patches]) - AC_MSG_RESULT([yes]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_FUNC_CPU_ONLINE -# -# cpu_online is different in rh 2.4, vanilla 2.4, and 2.6 -# -AC_DEFUN([LB_LINUX_FUNC_CPU_ONLINE], -[AC_MSG_CHECKING([if kernel defines cpu_online()]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - cpu_online(0); -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_CPU_ONLINE, 1, [cpu_online found]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_TYPE_CPUMASK_T -# -# same goes for cpumask_t -# -AC_DEFUN([LB_LINUX_TYPE_CPUMASK_T], -[AC_MSG_CHECKING([if kernel defines cpumask_t]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - return sizeof (cpumask_t); -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_CPUMASK_T, 1, [cpumask_t found]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_FUNC_SHOW_TASK -# -# we export show_task(), but not all kernels have it (yet) -# -AC_DEFUN([LB_LINUX_FUNC_SHOW_TASK], -[AC_MSG_CHECKING([if kernel exports show_task]) -have_show_task=0 -for file in ksyms sched ; do - if grep -q "EXPORT_SYMBOL(show_task)" \ - "$LINUX/kernel/$file.c" 2>/dev/null ; then - have_show_task=1 - break +[AM_CONDITIONAL(LINUX25, test x$linux25 = xyes) +]) + + +# +# LB_CHECK_SYMBOL_EXPORT +# check symbol exported or not +# $1 - symbol +# $2 - file(s) for find. +# $3 - do 'yes' +# $4 - do 'no' +# +# 2.6 based kernels - put modversion info into $LINUX/Module.modvers +# or check +AC_DEFUN([LB_CHECK_SYMBOL_EXPORT], +[AC_MSG_CHECKING([if Linux was built with symbol $1 is exported]) +grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null +rc=$? +if test $rc -ne 0; then + export=0 + for file in $2; do + grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null + rc=$? + if test $rc -eq 0; then + export=1 + break; fi -done -if test x$have_show_task = x1 ; then - AC_DEFINE(HAVE_SHOW_TASK, 1, [show_task is exported]) - AC_MSG_RESULT([yes]) + done + if test $export -eq 0; then + AC_MSG_RESULT([no]) + $4 + else + AC_MSG_RESULT([yes]) + $3 + fi else - AC_MSG_RESULT([no]) + AC_MSG_RESULT([yes]) + $3 fi ]) - -# -# LB_LINUX_CONFIG_EXT3 -# -# that ext3 is enabled in the kernel -# -AC_DEFUN([LB_LINUX_CONFIG_EXT3], -[LB_LINUX_CONFIG([EXT3_FS],[],[ - LB_LINUX_CONFIG([EXT3_FS_MODULE],[],[$2]) -]) -LB_LINUX_CONFIG([EXT3_FS_XATTR],[$1],[$3]) -]) - -# -# LB_LINUX_FSHOOKS -# -# If we have (and can build) fshooks.h -# -AC_DEFUN([LB_LINUX_FSHOOKS], -[AC_CHECK_FILE([$LINUX/include/linux/fshooks.h],[ - AC_MSG_CHECKING([if fshooks.h can be compiled]) - LB_LINUX_TRY_COMPILE([ - #include - ],[],[ - AC_MSG_RESULT([yes]) - ],[ - AC_MSG_RESULT([no]) - AC_MSG_WARN([You might have better luck with gcc 3.3.x.]) - AC_MSG_WARN([You can set CC=gcc33 before running configure.]) - AC_MSG_ERROR([Your compiler cannot build fshooks.h.]) - ]) -$1 -],[ -$2 -]) -]) - -# -# LB_LINUX_STRUCT_KIOBUF -# -# rh 2.4.18 has iobuf->dovary, but other kernels do not -# -AC_DEFUN([LB_LINUX_STRUCT_KIOBUF], -[AC_MSG_CHECKING([if struct kiobuf has a dovary field]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - struct kiobuf iobuf; - iobuf.dovary = 1; -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_KIOBUF_DOVARY, 1, [struct kiobuf has a dovary field]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_FUNC_COND_RESCHED -# -# cond_resched() was introduced in 2.4.20 -# -AC_DEFUN([LB_LINUX_FUNC_COND_RESCHED], -[AC_MSG_CHECKING([if kernel offers cond_resched]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - cond_resched(); -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_COND_RESCHED, 1, [cond_resched found]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_FUNC_ZAP_PAGE_RANGE -# -# if zap_page_range() takes a vma arg -# -AC_DEFUN([LB_LINUX_FUNC_ZAP_PAGE_RANGE], -[AC_MSG_CHECKING([if zap_pag_range with vma parameter]) -ZAP_PAGE_RANGE_VMA="`grep -c 'zap_page_range.*struct vm_area_struct' $LINUX/include/linux/mm.h`" -if test "$ZAP_PAGE_RANGE_VMA" != 0 ; then - AC_DEFINE(ZAP_PAGE_RANGE_VMA, 1, [zap_page_range with vma parameter]) - AC_MSG_RESULT([yes]) -else - AC_MSG_RESULT([no]) -fi -]) - -# -# LB_LINUX_FUNC_PDE -# -# if proc_fs.h defines PDE() -# -AC_DEFUN([LB_LINUX_FUNC_PDE], -[AC_MSG_CHECKING([if kernel defines PDE]) -HAVE_PDE="`grep -c 'proc_dir_entry..PDE' $LINUX/include/linux/proc_fs.h`" -if test "$HAVE_PDE" != 0 ; then - AC_DEFINE(HAVE_PDE, 1, [the kernel defines PDE]) - AC_MSG_RESULT([yes]) -else - AC_MSG_RESULT([no]) -fi -]) - -# -# LB_LINUX_FUNC_DIRECT_IO -# -# if direct_IO takes a struct file argument -# -AC_DEFUN([LB_LINUX_FUNC_DIRECT_IO], -[AC_MSG_CHECKING([if kernel passes struct file to direct_IO]) -HAVE_DIO_FILE="`grep -c 'direct_IO.*struct file' $LINUX/include/linux/fs.h`" -if test "$HAVE_DIO_FILE" != 0 ; then - AC_DEFINE(HAVE_DIO_FILE, 1, [the kernel passes struct file to direct_IO]) - AC_MSG_RESULT(yes) -else - AC_MSG_RESULT(no) -fi -]) - -# -# LB_LINUX_HEADER_MM_INLINE -# -# RHEL kernels define page_count in mm_inline.h -# -AC_DEFUN([LB_LINUX_HEADER_MM_INLINE], -[AC_MSG_CHECKING([if kernel has mm_inline.h header]) -LB_LINUX_TRY_COMPILE([ - #include -],[ - #ifndef page_count - #error mm_inline.h does not define page_count - #endif -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_MM_INLINE, 1, [mm_inline found]) -],[ - AC_MSG_RESULT([no]) -]) -]) - -# -# LB_LINUX_STRUCT_INODE -# -# if inode->i_alloc_sem exists -# -AC_DEFUN([LB_LINUX_STRUCT_INODE], -[AC_MSG_CHECKING([if struct inode has i_alloc_sem]) -LB_LINUX_TRY_COMPILE([ - #include - #include -],[ - #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,24)) - #error "down_read_trylock broken before 2.4.24" - #endif - struct inode i; - return (char *)&i.i_alloc_sem - (char *)&i; -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE(HAVE_I_ALLOC_SEM, 1, [struct inode has i_alloc_sem]) -],[ - AC_MSG_RESULT([no]) -]) -])