AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_KERNEL
- SPL_AC_KERNEL_CONFIG
if test "${LINUX_OBJ}" != "${LINUX}"; then
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
AC_SUBST(KERNELCPPFLAGS)
- SPL_AC_DEBUG
- SPL_AC_DEBUG_KMEM
- SPL_AC_DEBUG_KMEM_TRACKING
+ SPL_AC_TEST_MODULE
SPL_AC_ATOMIC_SPINLOCK
- SPL_AC_TYPE_ATOMIC64_CMPXCHG
- SPL_AC_TYPE_ATOMIC64_XCHG
- SPL_AC_TYPE_UINTPTR_T
- SPL_AC_3ARGS_INIT_WORK
- SPL_AC_2ARGS_REGISTER_SYSCTL
- SPL_AC_SET_SHRINKER
- SPL_AC_3ARGS_SHRINKER_CALLBACK
- SPL_AC_PATH_IN_NAMEIDATA
- SPL_AC_TASK_CURR
- SPL_AC_CTL_UNNUMBERED
+ SPL_AC_SHRINKER_CALLBACK
SPL_AC_CTL_NAME
- SPL_AC_FLS64
- SPL_AC_DEVICE_CREATE
- SPL_AC_5ARGS_DEVICE_CREATE
- SPL_AC_CLASS_DEVICE_CREATE
- SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
- SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
- SPL_AC_TIMESPEC_SUB
- SPL_AC_INIT_UTSNAME
- SPL_AC_FDTABLE_HEADER
- SPL_AC_FILES_FDTABLE
- SPL_AC_UACCESS_HEADER
- SPL_AC_KMALLOC_NODE
- SPL_AC_MONOTONIC_CLOCK
- SPL_AC_INODE_I_MUTEX
- SPL_AC_MUTEX_OWNER
- SPL_AC_MUTEX_OWNER_TASK_STRUCT
- SPL_AC_MUTEX_LOCK_NESTED
- SPL_AC_3ARGS_ON_EACH_CPU
- SPL_AC_KALLSYMS_LOOKUP_NAME
- SPL_AC_GET_VMALLOC_INFO
- SPL_AC_PGDAT_HELPERS
- SPL_AC_FIRST_ONLINE_PGDAT
- SPL_AC_NEXT_ONLINE_PGDAT
- SPL_AC_NEXT_ZONE
- SPL_AC_PGDAT_LIST
- SPL_AC_GLOBAL_PAGE_STATE
- SPL_AC_ZONE_STAT_ITEM_FREE
- SPL_AC_ZONE_STAT_ITEM_INACTIVE
- SPL_AC_ZONE_STAT_ITEM_ACTIVE
- SPL_AC_GET_ZONE_COUNTS
- SPL_AC_USER_PATH_DIR
- SPL_AC_SET_FS_PWD
- SPL_AC_2ARGS_SET_FS_PWD
- SPL_AC_2ARGS_VFS_UNLINK
- SPL_AC_4ARGS_VFS_RENAME
- SPL_AC_VFS_FSYNC
+ SPL_AC_CONFIG_TRIM_UNUSED_KSYMS
+ SPL_AC_PDE_DATA
+ SPL_AC_SET_FS_PWD_WITH_CONST
SPL_AC_2ARGS_VFS_FSYNC
+ SPL_AC_INODE_TRUNCATE_RANGE
SPL_AC_FS_STRUCT_SPINLOCK
- SPL_AC_CRED_STRUCT
- SPL_AC_GROUPS_SEARCH
- SPL_AC_PUT_TASK_STRUCT
- SPL_AC_5ARGS_PROC_HANDLER
- SPL_AC_KVASPRINTF
- SPL_AC_EXPORTED_RWSEM_IS_LOCKED
- SPL_AC_KERNEL_INVALIDATE_INODES
- SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
- SPL_AC_SHRINK_DCACHE_MEMORY
- SPL_AC_SHRINK_ICACHE_MEMORY
- SPL_AC_KERN_PATH_PARENT_HEADER
- SPL_AC_KERN_PATH_PARENT_SYMBOL
+ SPL_AC_KUIDGID_T
+ SPL_AC_KERNEL_FALLOCATE
+ SPL_AC_CONFIG_ZLIB_INFLATE
+ SPL_AC_CONFIG_ZLIB_DEFLATE
SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
SPL_AC_SHRINK_CONTROL_STRUCT
SPL_AC_RWSEM_SPINLOCK_IS_RAW
+ SPL_AC_RWSEM_ACTIVITY
+ SPL_AC_RWSEM_ATOMIC_LONG_COUNT
+ SPL_AC_SCHED_RT_HEADER
+ SPL_AC_SCHED_SIGNAL_HEADER
+ SPL_AC_4ARGS_VFS_GETATTR
+ SPL_AC_3ARGS_VFS_GETATTR
+ SPL_AC_2ARGS_VFS_GETATTR
+ SPL_AC_USLEEP_RANGE
+ SPL_AC_KMEM_CACHE_ALLOCFLAGS
+ SPL_AC_WAIT_ON_BIT
+ SPL_AC_INODE_LOCK
+ SPL_AC_GROUP_INFO_GID
+ SPL_AC_KMEM_CACHE_CREATE_USERCOPY
+ SPL_AC_WAIT_QUEUE_ENTRY_T
+ SPL_AC_WAIT_QUEUE_HEAD_ENTRY
+ SPL_AC_IO_SCHEDULE_TIMEOUT
+ SPL_AC_KERNEL_WRITE
+ SPL_AC_KERNEL_READ
+ SPL_AC_KERNEL_TIMER_FUNCTION_TIMER_LIST
])
AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
modpost=$LINUX/scripts/Makefile.modpost
AC_MSG_CHECKING([kernel file name for module symbols])
- if test -f "$modpost"; then
+ if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
if grep -q Modules.symvers $modpost; then
LINUX_SYMBOLS=Modules.symvers
else
if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
AC_MSG_ERROR([
*** Please make sure the kernel devel package for your distribution
- *** is installed. If your building with a custom kernel make sure the
+ *** is installed. If you are building with a custom kernel, make sure the
*** kernel is configured, built, and the '--with-linux=PATH' configure
*** option refers to the location of the kernel source.])
fi
sourcelink=$(readlink -f "$headersdir")
else
sourcelink=$(ls -1d /usr/src/kernels/* \
- /usr/src/linux-* \
+ /usr/src/linux-* \
2>/dev/null | grep -v obj | tail -1)
fi
if test -n "$sourcelink" && test -e ${sourcelink}; then
kernelsrc=`readlink -f ${sourcelink}`
else
- AC_MSG_RESULT([Not found])
- AC_MSG_ERROR([
- *** Please make sure the kernel devel package for your distribution
- *** is installed then try again. If that fails you can specify the
- *** location of the kernel source with the '--with-linux=PATH' option.])
+ kernelsrc="[Not found]"
fi
else
if test "$kernelsrc" = "NONE"; then
kernsrcver=NONE
fi
+ withlinux=yes
fi
AC_MSG_RESULT([$kernelsrc])
+ if test ! -d "$kernelsrc"; then
+ AC_MSG_ERROR([
+ *** Please make sure the kernel devel package for your distribution
+ *** is installed and then try again. If that fails, you can specify the
+ *** location of the kernel source with the '--with-linux=PATH' option.])
+ fi
+
AC_MSG_CHECKING([kernel build directory])
if test -z "$kernelbuild"; then
- if test -e "/lib/modules/$(uname -r)/build"; then
+ if test x$withlinux != xyes -a -e "/lib/modules/$(uname -r)/build"; then
kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
fi
else
AC_MSG_RESULT([Not found])
- AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+ if test "x$enable_linux_builtin" != xyes; then
+ AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+ else
+ AC_MSG_ERROR([
+ *** Cannot find UTS_RELEASE definition.
+ *** Please run 'make prepare' inside the kernel source tree.])
+ fi
fi
AC_MSG_RESULT([$kernsrcver])
SPL_AC_MODULE_SYMVERS
])
-AC_DEFUN([SPL_AC_KERNEL_CONFIG], [
- SPL_LINUX_CONFIG([PREEMPT],
- AC_MSG_ERROR([
- *** Kernel built with CONFIG_PREEMPT which is not supported.
- ** You must rebuild your kernel without this option.]), [])
-])
-
dnl #
dnl # Default SPL user configuration
dnl #
dnl #
dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
-dnl # are missing it is non-fatal but you will not be able to build
+dnl # are missing, it is non-fatal, but you will not be able to build
dnl # RPM packages and will be warned if you try too.
dnl #
+dnl # By default, the generic spec file will be used because it requires
+dnl # minimal dependencies. Distribution specific spec files can be
+dnl # placed under the 'rpm/<distribution>' directory and enabled using
+dnl # the --with-spec=<distribution> configure option.
+dnl #
AC_DEFUN([SPL_AC_RPM], [
RPM=rpm
RPMBUILD=rpmbuild
AC_MSG_RESULT([$HAVE_RPMBUILD])
])
+ RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1"'
+ RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM) 1"'
+ RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_TRACKING) 1"'
+ RPM_DEFINE_UTIL=
+ RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
+ RPM_DEFINE_KMOD+=' --define "_wrong_version_format_terminate_build 0"'
+ RPM_DEFINE_DKMS=
+
+ SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
+ SRPM_DEFINE_UTIL=
+ SRPM_DEFINE_KMOD=
+ SRPM_DEFINE_DKMS=
+
+ RPM_SPEC_DIR="rpm/generic"
+ AC_ARG_WITH([spec],
+ AS_HELP_STRING([--with-spec=SPEC],
+ [Spec files 'generic|redhat']),
+ [RPM_SPEC_DIR="rpm/$withval"])
+
+ AC_MSG_CHECKING([whether spec files are available])
+ AC_MSG_RESULT([yes ($RPM_SPEC_DIR/*.spec.in)])
+
AC_SUBST(HAVE_RPM)
AC_SUBST(RPM)
AC_SUBST(RPM_VERSION)
AC_SUBST(HAVE_RPMBUILD)
AC_SUBST(RPMBUILD)
AC_SUBST(RPMBUILD_VERSION)
+
+ AC_SUBST(RPM_SPEC_DIR)
+ AC_SUBST(RPM_DEFINE_UTIL)
+ AC_SUBST(RPM_DEFINE_KMOD)
+ AC_SUBST(RPM_DEFINE_DKMS)
+ AC_SUBST(RPM_DEFINE_COMMON)
+ AC_SUBST(SRPM_DEFINE_UTIL)
+ AC_SUBST(SRPM_DEFINE_KMOD)
+ AC_SUBST(SRPM_DEFINE_DKMS)
+ AC_SUBST(SRPM_DEFINE_COMMON)
])
dnl #
AC_SUBST(DPKGBUILD_VERSION)
])
-dnl #
-dnl # Check for pacman+makepkg to build Arch Linux packages. If these
-dnl # tools are missing it is non-fatal but you will not be able to
-dnl # build Arch Linux packages and will be warned if you try too.
-dnl #
-AC_DEFUN([SPL_AC_PACMAN], [
- PACMAN=pacman
- MAKEPKG=makepkg
-
- AC_MSG_CHECKING([whether $PACMAN is available])
- tmp=$($PACMAN --version 2>/dev/null)
- AS_IF([test -n "$tmp"], [
- PACMAN_VERSION=$(echo $tmp |
- $AWK '/Pacman/ { print $[3] }' |
- $SED 's/^v//')
- HAVE_PACMAN=yes
- AC_MSG_RESULT([$HAVE_PACMAN ($PACMAN_VERSION)])
- ],[
- HAVE_PACMAN=no
- AC_MSG_RESULT([$HAVE_PACMAN])
- ])
-
- AC_MSG_CHECKING([whether $MAKEPKG is available])
- tmp=$($MAKEPKG --version 2>/dev/null)
- AS_IF([test -n "$tmp"], [
- MAKEPKG_VERSION=$(echo $tmp | $AWK '/makepkg/ { print $[3] }')
- HAVE_MAKEPKG=yes
- AC_MSG_RESULT([$HAVE_MAKEPKG ($MAKEPKG_VERSION)])
- ],[
- HAVE_MAKEPKG=no
- AC_MSG_RESULT([$HAVE_MAKEPKG])
- ])
-
- AC_SUBST(HAVE_PACMAN)
- AC_SUBST(PACMAN)
- AC_SUBST(PACMAN_VERSION)
-
- AC_SUBST(HAVE_MAKEPKG)
- AC_SUBST(MAKEPKG)
- AC_SUBST(MAKEPKG_VERSION)
-])
-
dnl #
dnl # Until native packaging for various different packing systems
dnl # can be added the least we can do is attempt to use alien to
dnl #
AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
AC_MSG_CHECKING([linux distribution])
- if test -f /etc/redhat-release ; then
- VENDOR=redhat ;
+ if test -f /etc/toss-release ; then
+ VENDOR=toss ;
elif test -f /etc/fedora-release ; then
VENDOR=fedora ;
+ elif test -f /etc/redhat-release ; then
+ VENDOR=redhat ;
+ elif test -f /etc/gentoo-release ; then
+ VENDOR=gentoo ;
elif test -f /etc/arch-release ; then
VENDOR=arch ;
- elif test -f /etc/lsb-release ; then
- VENDOR=ubuntu ;
- elif test -f /etc/debian_version ; then
- VENDOR=debian ;
elif test -f /etc/SuSE-release ; then
VENDOR=sles ;
elif test -f /etc/slackware-version ; then
VENDOR=slackware ;
- elif test -f /etc/gentoo-release ; then
- VENDOR=gentoo ;
+ elif test -f /etc/lunar.release ; then
+ VENDOR=lunar ;
+ elif test -f /etc/lsb-release ; then
+ VENDOR=ubuntu ;
+ elif test -f /etc/debian_version ; then
+ VENDOR=debian ;
else
VENDOR= ;
fi
AC_MSG_CHECKING([default package type])
case "$VENDOR" in
- fedora) DEFAULT_PACKAGE=rpm ;;
- redhat) DEFAULT_PACKAGE=rpm ;;
- sles) DEFAULT_PACKAGE=rpm ;;
- ubuntu) DEFAULT_PACKAGE=deb ;;
- debian) DEFAULT_PACKAGE=deb ;;
- slackware) DEFAULT_PACKAGE=tgz ;;
- arch) DEFAULT_PACKAGE=arch;;
- *) DEFAULT_PACKAGE=rpm ;;
+ toss) DEFAULT_PACKAGE=rpm ;;
+ redhat) DEFAULT_PACKAGE=rpm ;;
+ fedora) DEFAULT_PACKAGE=rpm ;;
+ gentoo) DEFAULT_PACKAGE=tgz ;;
+ arch) DEFAULT_PACKAGE=tgz ;;
+ sles) DEFAULT_PACKAGE=rpm ;;
+ slackware) DEFAULT_PACKAGE=tgz ;;
+ lunar) DEFAULT_PACKAGE=tgz ;;
+ ubuntu) DEFAULT_PACKAGE=deb ;;
+ debian) DEFAULT_PACKAGE=deb ;;
+ *) DEFAULT_PACKAGE=rpm ;;
esac
AC_MSG_RESULT([$DEFAULT_PACKAGE])
SPL_AC_RPM
SPL_AC_DPKG
SPL_AC_ALIEN
-
- AS_IF([test "$VENDOR" = "arch"], [SPL_AC_PACMAN])
])
AC_DEFUN([SPL_AC_LICENSE], [
+ AC_MSG_CHECKING([spl author])
+ AC_MSG_RESULT([$SPL_META_AUTHOR])
+
AC_MSG_CHECKING([spl license])
- LICENSE=GPL
- AC_MSG_RESULT([$LICENSE])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
- AC_SUBST(LICENSE)
+ AC_MSG_RESULT([$SPL_META_LICENSE])
])
AC_DEFUN([SPL_AC_CONFIG], [
- SPL_CONFIG=all
- AC_ARG_WITH([config],
- AS_HELP_STRING([--with-config=CONFIG],
- [Config file 'kernel|user|all|srpm']),
- [SPL_CONFIG="$withval"])
-
- AC_MSG_CHECKING([spl config])
- AC_MSG_RESULT([$SPL_CONFIG]);
- AC_SUBST(SPL_CONFIG)
-
- case "$SPL_CONFIG" in
- kernel) SPL_AC_CONFIG_KERNEL ;;
- user) SPL_AC_CONFIG_USER ;;
- all) SPL_AC_CONFIG_KERNEL
- SPL_AC_CONFIG_USER ;;
+ SPL_CONFIG=all
+ AC_ARG_WITH([config],
+ AS_HELP_STRING([--with-config=CONFIG],
+ [Config file 'kernel|user|all|srpm']),
+ [SPL_CONFIG="$withval"])
+ AC_ARG_ENABLE([linux-builtin],
+ [AC_HELP_STRING([--enable-linux-builtin],
+ [Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
+ [],
+ [enable_linux_builtin=no])
+
+ AC_MSG_CHECKING([spl config])
+ AC_MSG_RESULT([$SPL_CONFIG]);
+ AC_SUBST(SPL_CONFIG)
+
+ case "$SPL_CONFIG" in
+ kernel) SPL_AC_CONFIG_KERNEL ;;
+ user) SPL_AC_CONFIG_USER ;;
+ all) SPL_AC_CONFIG_KERNEL
+ SPL_AC_CONFIG_USER ;;
srpm) ;;
- *)
- AC_MSG_RESULT([Error!])
- AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
- user kernel|user|all|srpm]) ;;
- esac
-
- AM_CONDITIONAL([CONFIG_USER],
- [test "$SPL_CONFIG" = user] ||
- [test "$SPL_CONFIG" = all])
- AM_CONDITIONAL([CONFIG_KERNEL],
- [test "$SPL_CONFIG" = kernel] ||
- [test "$SPL_CONFIG" = all])
+ *)
+ AC_MSG_RESULT([Error!])
+ AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
+ user kernel|user|all|srpm]) ;;
+ esac
+
+ AM_CONDITIONAL([CONFIG_USER],
+ [test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
+ AM_CONDITIONAL([CONFIG_KERNEL],
+ [test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
+ [test "x$enable_linux_builtin" != xyes ])
])
dnl #
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
DEBUG_CFLAGS="-DDEBUG -Werror"
- ],
- [
+ DEBUG_SPL="_with_debug"
+ ], [
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
DEBUG_CFLAGS="-DNDEBUG"
+ DEBUG_SPL="_without_debug"
])
AC_SUBST(DEBUG_CFLAGS)
+ AC_SUBST(DEBUG_SPL)
AC_MSG_RESULT([$enable_debug])
])
dnl # Enabled by default it provides a minimal level of memory tracking.
dnl # A total count of bytes allocated is kept for each alloc and free.
dnl # Then at module unload time a report to the console will be printed
-dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
-dnl # and provide an easy way to inspect the kmem based slab.
+dnl # if memory was leaked.
dnl #
AC_DEFUN([SPL_AC_DEBUG_KMEM], [
AC_ARG_ENABLE([debug-kmem],
[AS_HELP_STRING([--enable-debug-kmem],
- [Enable basic kmem accounting @<:@default=yes@:>@])],
+ [Enable basic kmem accounting @<:@default=no@:>@])],
[],
- [enable_debug_kmem=yes])
+ [enable_debug_kmem=no])
AS_IF([test "x$enable_debug_kmem" = xyes],
- [AC_DEFINE([DEBUG_KMEM], [1],
+ [
+ KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
+ DEBUG_KMEM="_with_debug_kmem"
+ AC_DEFINE([DEBUG_KMEM], [1],
[Define to 1 to enable basic kmem accounting])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"])
+ ], [
+ DEBUG_KMEM="_without_debug_kmem"
+ ])
+ AC_SUBST(DEBUG_KMEM)
AC_MSG_CHECKING([whether basic kmem accounting is enabled])
AC_MSG_RESULT([$enable_debug_kmem])
])
[enable_debug_kmem_tracking=no])
AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
- [AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
+ [
+ KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
+ DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
+ AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
[Define to 1 to enable detailed kmem tracking])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"])
+ ], [
+ DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
+ ])
+ AC_SUBST(DEBUG_KMEM_TRACKING)
AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
AC_MSG_RESULT([$enable_debug_kmem_tracking])
])
dnl #
AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
- rm -Rf build && mkdir -p build
+ rm -Rf build && mkdir -p build && touch build/conftest.mod.c
echo "obj-m := conftest.o" >build/Makefile
+ modpost_flag=''
+ test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
AS_IF(
- [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])],
- [$4],
- [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
+ [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 $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
+ [$4],
+ [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
)
rm -Rf build
])
[$3], [$4])
])
-dnl #
-dnl # SPL_LINUX_CONFIG
-dnl #
-AC_DEFUN([SPL_LINUX_CONFIG],
- [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/module.h>
- ],[
- #ifndef CONFIG_$1
- #error CONFIG_$1 not #defined
- #endif
- ],[
- AC_MSG_RESULT([yes])
- $2
- ],[
- AC_MSG_RESULT([no])
- $3
- ])
-])
-
dnl #
dnl # SPL_CHECK_SYMBOL_EXPORT
dnl # check symbol exported or not
dnl #
-AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
- [AC_MSG_CHECKING([whether symbol $1 is exported])
+AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
$LINUX_OBJ/Module*.symvers 2>/dev/null
rc=$?
grep -q -E "EXPORT_SYMBOL.*($1)" \
"$LINUX_OBJ/$file" 2>/dev/null
rc=$?
- if test $rc -eq 0; then
- export=1
- break;
- fi
+ if test $rc -eq 0; then
+ export=1
+ break;
+ fi
done
- if test $export -eq 0; then
- AC_MSG_RESULT([no])
+ if test $export -eq 0; then :
$4
- else
- AC_MSG_RESULT([yes])
+ else :
$3
fi
- else
- AC_MSG_RESULT([yes])
+ else :
$3
fi
])
+dnl #
+dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
+dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
+dnl # is called if not compiling for builtin
+dnl #
+AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
+ SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
+ if test $rc -ne 0; then :
+ $6
+ else
+ if test "x$enable_linux_builtin" != xyes; then
+ SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
+ fi
+ if test $rc -ne 0; then :
+ $6
+ else :
+ $5
+ fi
+ fi
+])
+
dnl #
dnl # SPL_CHECK_SYMBOL_HEADER
dnl # check if a symbol prototype is defined in listed headers.
for file in $3; do
grep -q "$2" "$LINUX/$file" 2>/dev/null
rc=$?
- if test $rc -eq 0; then
- header=1
- break;
- fi
+ if test $rc -eq 0; then
+ header=1
+ break;
+ fi
done
if test $header -eq 0; then
AC_MSG_RESULT([no])
])
])
+dnl #
+dnl # Basic toolchain sanity check. Verify that kernel modules can
+dnl # be built and which symbols can be used.
+dnl #
+AC_DEFUN([SPL_AC_TEST_MODULE],
+ [AC_MSG_CHECKING([whether modules can be built])
+ SPL_LINUX_TRY_COMPILE([],[],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ if test "x$enable_linux_builtin" != xyes; then
+ AC_MSG_ERROR([*** Unable to build an empty module.])
+ else
+ AC_MSG_ERROR([
+ *** Unable to build an empty module.
+ *** Please run 'make scripts' inside the kernel source tree.])
+ fi
+ ])
+
+ AS_IF([test "x$cross_compiling" != xyes], [
+ AC_RUN_IFELSE([
+ AC_LANG_PROGRAM([
+ #include "$LINUX/include/linux/license.h"
+ ], [
+ return !license_is_gpl_compatible(
+ "$SPL_META_LICENSE");
+ ])
+ ], [
+ AC_DEFINE([SPL_IS_GPL_COMPATIBLE], [1],
+ [Define to 1 if GPL-only symbols can be used])
+ ], [
+ ])
+ ])
+])
+
dnl #
dnl # Use the atomic implemenation based on global spinlocks. This
dnl # should only be needed by 32-bit kernels which do not provide
[enable_atomic_spinlocks=check])
SPL_LINUX_TRY_COMPILE([
- #include <asm/atomic.h>
+ #include <linux/fs.h>
],[
atomic64_t *ptr __attribute__ ((unused));
],[
AC_MSG_CHECKING([whether kernel defines atomic64_t])
AC_MSG_RESULT([$have_atomic64_t])
])
-
-dnl #
-dnl # 2.6.24 API change,
-dnl # check if atomic64_cmpxchg is defined
-dnl #
-AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
- [AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
- SPL_LINUX_TRY_COMPILE([
- #include <asm/atomic.h>
- #include <asm/system.h>
- ],[
- atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
- ],[
- AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
- [kernel defines atomic64_cmpxchg])
- ],[
- AC_MSG_RESULT([no])
- ])
-])
-
-dnl #
-dnl # 2.6.24 API change,
-dnl # check if atomic64_xchg is defined
-dnl #
-AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
- [AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
- SPL_LINUX_TRY_COMPILE([
- #include <asm/atomic.h>
- ],[
- atomic64_xchg((atomic64_t *)NULL, 0);
- ],[
- AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
- [kernel defines atomic64_xchg])
- ],[
- AC_MSG_RESULT([no])
- ])
-])
-
-dnl #
-dnl # 2.6.24 API change,
-dnl # check if uintptr_t typedef is defined
-dnl #
-AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
- [AC_MSG_CHECKING([whether kernel defines uintptr_t])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/types.h>
- ],[
- uintptr_t *ptr __attribute__ ((unused));
- ],[
- AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_UINTPTR_T, 1,
- [kernel defines uintptr_t])
- ],[
- AC_MSG_RESULT([no])
- ])
-])
-
-dnl #
-dnl # 2.6.20 API change,
-dnl # INIT_WORK use 2 args and not store data inside
-dnl #
-AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
- [AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/workqueue.h>
- ],[
- struct work_struct work __attribute__ ((unused));
- INIT_WORK(&work, NULL, NULL);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
- [INIT_WORK wants 3 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.21 API change,
-dnl # 'register_sysctl_table' use only one argument instead of two
-dnl #
-AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
- [AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sysctl.h>
- ],[
- (void) register_sysctl_table(NULL, 0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
- [register_sysctl_table() wants 2 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.23 API change
-dnl # Old set_shrinker API replaced with register_shrinker
-dnl #
-AC_DEFUN([SPL_AC_SET_SHRINKER], [
- AC_MSG_CHECKING([whether set_shrinker() available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- return set_shrinker(DEFAULT_SEEKS, NULL);
- ],[
- AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_SET_SHRINKER, 1,
- [set_shrinker() available])
- ],[
- AC_MSG_RESULT([no])
- ])
-])
-
-dnl #
-dnl # 2.6.35 API change,
-dnl # Add context to shrinker callback
-dnl #
-AC_DEFUN([SPL_AC_3ARGS_SHRINKER_CALLBACK],
- [AC_MSG_CHECKING([whether shrinker callback wants 3 args])
- tmp_flags="$EXTRA_KCFLAGS"
- EXTRA_KCFLAGS="-Werror"
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
-
- int shrinker_cb(struct shrinker *, int, unsigned int);
- ],[
- struct shrinker cache_shrinker = {
- .shrink = shrinker_cb,
- .seeks = DEFAULT_SEEKS,
- };
- register_shrinker(&cache_shrinker);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
- [shrinker callback wants 3 args])
- ],[
- AC_MSG_RESULT(no)
- ])
- EXTRA_KCFLAGS="$tmp_flags"
-])
-
-dnl #
-dnl # 2.6.25 API change,
-dnl # struct path entry added to struct nameidata
-dnl #
-AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
- [AC_MSG_CHECKING([whether struct path used in struct nameidata])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/namei.h>
- ],[
- struct nameidata nd __attribute__ ((unused));
-
- nd.path.mnt = NULL;
- nd.path.dentry = NULL;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
- [struct path used in struct nameidata])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # Custom SPL patch may export this system it is not required
-dnl #
-AC_DEFUN([SPL_AC_TASK_CURR], [
- SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
- [AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
- [])
-])
-
-dnl #
-dnl # 2.6.19 API change,
-dnl # Use CTL_UNNUMBERED when binary sysctl is not required
-dnl #
-AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
- [AC_MSG_CHECKING([whether unnumbered sysctl support exists])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sysctl.h>
- ],[
- #ifndef CTL_UNNUMBERED
- #error CTL_UNNUMBERED undefined
- #endif
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
- [unnumbered sysctl support exists])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.33 API change,
-dnl # Removed .ctl_name from struct ctl_table.
-dnl #
-AC_DEFUN([SPL_AC_CTL_NAME], [
- AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sysctl.h>
- ],[
- struct ctl_table ctl __attribute__ ((unused));
- ctl.ctl_name = 0;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.16 API change.
-dnl # Check if 'fls64()' is available
-dnl #
-AC_DEFUN([SPL_AC_FLS64],
- [AC_MSG_CHECKING([whether fls64() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/bitops.h>
- ],[
- return fls64(0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.18 API change, check whether device_create() is available.
-dnl # Device_create() was introduced in 2.6.18 and depricated
-dnl # class_device_create() which was fully removed in 2.6.26.
-dnl #
-AC_DEFUN([SPL_AC_DEVICE_CREATE], [
- SPL_CHECK_SYMBOL_EXPORT(
- [device_create],
- [drivers/base/core.c],
- [AC_DEFINE(HAVE_DEVICE_CREATE, 1,
- [device_create() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.27 API change,
-dnl # device_create() uses 5 args, new 'drvdata' argument.
-dnl #
-AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
- AC_MSG_CHECKING([whether device_create() wants 5 args])
- tmp_flags="$EXTRA_KCFLAGS"
- EXTRA_KCFLAGS="-Werror"
- SPL_LINUX_TRY_COMPILE([
- #include <linux/device.h>
- ],[
- device_create(NULL, NULL, 0, NULL, "%d", 1);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
- [device_create wants 5 args])
- ],[
- AC_MSG_RESULT(no)
- ])
- EXTRA_KCFLAGS="$tmp_flags"
-])
-
-dnl #
-dnl # 2.6.13 API change, check whether class_device_create() is available.
-dnl # Class_device_create() was introduced in 2.6.13 and depricated
-dnl # class_simple_device_add() which was fully removed in 2.6.13.
-dnl #
-AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
- SPL_CHECK_SYMBOL_EXPORT(
- [class_device_create],
- [drivers/base/class.c],
- [AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
- [class_device_create() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.26 API change, set_normalized_timespec() is exported.
-dnl #
-AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
- SPL_CHECK_SYMBOL_EXPORT(
- [set_normalized_timespec],
- [kernel/time.c],
- [AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
- [set_normalized_timespec() is available as export])],
- [])
-])
-
-dnl #
-dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
-dnl # previously it was available in time.h as an inline.
-dnl #
-AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
- AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/time.h>
- void set_normalized_timespec(struct timespec *ts,
- time_t sec, long nsec) { }
- ],
- [],
- [
- AC_MSG_RESULT(no)
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
- [set_normalized_timespec() is available as inline])
- ])
-])
-
-dnl #
-dnl # 2.6.18 API change,
-dnl # timespec_sub() inline function available in linux/time.h
-dnl #
-AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
- AC_MSG_CHECKING([whether timespec_sub() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/time.h>
- ],[
- struct timespec a = { 0 };
- struct timespec b = { 0 };
- struct timespec c __attribute__ ((unused));
- c = timespec_sub(a, b);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.19 API change,
-dnl # check if init_utsname() is available in linux/utsname.h
-dnl #
-AC_DEFUN([SPL_AC_INIT_UTSNAME], [
- AC_MSG_CHECKING([whether init_utsname() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/utsname.h>
- ],[
- struct new_utsname *a __attribute__ ((unused));
- a = init_utsname();
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.26 API change,
-dnl # definition of struct fdtable relocated to linux/fdtable.h
-dnl #
-AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
- SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
-])
-
-dnl #
-dnl # 2.6.14 API change,
-dnl # check whether 'files_fdtable()' exists
-dnl #
-AC_DEFUN([SPL_AC_FILES_FDTABLE], [
- AC_MSG_CHECKING([whether files_fdtable() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sched.h>
- #include <linux/file.h>
- #ifdef HAVE_FDTABLE_HEADER
- #include <linux/fdtable.h>
- #endif
- ],[
- struct files_struct *files = current->files;
- struct fdtable *fdt __attribute__ ((unused));
- fdt = files_fdtable(files);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.18 API change,
-dnl # added linux/uaccess.h
-dnl #
-AC_DEFUN([SPL_AC_UACCESS_HEADER], [
- SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
-])
-
-dnl #
-dnl # 2.6.12 API change,
-dnl # check whether 'kmalloc_node()' is available.
-dnl #
-AC_DEFUN([SPL_AC_KMALLOC_NODE], [
- AC_MSG_CHECKING([whether kmalloc_node() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/slab.h>
- ],[
- void *a __attribute__ ((unused));
- a = kmalloc_node(1, GFP_KERNEL, 0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.9 API change,
-dnl # check whether 'monotonic_clock()' is available it may
-dnl # be available for some archs but not others.
-dnl #
-AC_DEFUN([SPL_AC_MONOTONIC_CLOCK], [
- SPL_CHECK_SYMBOL_EXPORT(
- [monotonic_clock],
- [],
- [AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
- [monotonic_clock() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.16 API change,
-dnl # check whether 'struct inode' has i_mutex
-dnl #
-AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
- AC_MSG_CHECKING([whether struct inode has i_mutex])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/fs.h>
- #include <linux/mutex.h>
- ],[
- struct inode i;
- mutex_init(&i.i_mutex);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.29 API change,
-dnl # Adaptive mutexs introduced.
-dnl #
-AC_DEFUN([SPL_AC_MUTEX_OWNER], [
- AC_MSG_CHECKING([whether struct mutex has owner])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mutex.h>
- ],[
- struct mutex mtx __attribute__ ((unused));
- mtx.owner = NULL;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.39 API change,
-dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
-dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
-dnl # was defined. As of 2.6.39 this was changed to a task_struct
-dnl # pointer which frankly makes a lot more sense.
-dnl #
-AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
- AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
- tmp_flags="$EXTRA_KCFLAGS"
- EXTRA_KCFLAGS="-Werror"
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mutex.h>
- ],[
- struct mutex mtx __attribute__ ((unused));
- mtx.owner = current;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
- [struct mutex owner is a task_struct])
- ],[
- AC_MSG_RESULT(no)
- ])
- EXTRA_KCFLAGS="$tmp_flags"
-])
-
-dnl #
-dnl # 2.6.18 API change,
-dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
-dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
-dnl # if the mutex validator is disabled or otherwise unavailable.
-dnl #
-AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
- AC_MSG_CHECKING([whether mutex_lock_nested() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mutex.h>
- ],[
- struct mutex mutex;
- mutex_init(&mutex);
- mutex_lock_nested(&mutex, 0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
- [mutex_lock_nested() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.27 API change,
-dnl # on_each_cpu() uses 3 args, no 'retry' argument
-dnl #
-AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
- AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/smp.h>
- ],[
- on_each_cpu(NULL, NULL, 0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
- [on_each_cpu wants 3 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.18 API change,
-dnl # kallsyms_lookup_name no longer exported
-dnl #
-AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME], [
- SPL_CHECK_SYMBOL_EXPORT(
- [kallsyms_lookup_name],
- [],
- [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
- [kallsyms_lookup_name() is available])],
- [])
-])
-
-dnl #
-dnl # Proposed API change,
-dnl # This symbol is not available in stock kernels. You may build a
-dnl # custom kernel with the *-spl-export-symbols.patch which will export
-dnl # these symbols for use. If your already rolling a custom kernel for
-dnl # your environment this is recommended.
-dnl #
-AC_DEFUN([SPL_AC_GET_VMALLOC_INFO], [
- SPL_CHECK_SYMBOL_EXPORT(
- [get_vmalloc_info],
- [],
- [AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
- [get_vmalloc_info() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.17 API change
-dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
-dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
-dnl # were exported in 2.6.17 for use by modules which was consistent with
-dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
-dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
-dnl # were dropped entirely leaving modules no way to directly iterate over
-dnl # the zone list. Because we need access to the zone helpers we check
-dnl # if the kernel contains the old or new implementation. Then we check
-dnl # to see if the symbols we need for each version are available. If they
-dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
-dnl #
-AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
- AC_MSG_CHECKING([whether symbol *_pgdat exist])
- grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
- rc=$?
- if test $rc -eq 0; then
- AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
- else
- AC_MSG_RESULT([no])
- fi
-])
-
-dnl #
-dnl # Proposed API change,
-dnl # This symbol is not available in stock kernels. You may build a
-dnl # custom kernel with the *-spl-export-symbols.patch which will export
-dnl # these symbols for use. If your already rolling a custom kernel for
-dnl # your environment this is recommended.
-dnl #
-AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT], [
- SPL_CHECK_SYMBOL_EXPORT(
- [first_online_pgdat],
- [],
- [AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
- [first_online_pgdat() is available])],
- [])
-])
-
-dnl #
-dnl # Proposed API change,
-dnl # This symbol is not available in stock kernels. You may build a
-dnl # custom kernel with the *-spl-export-symbols.patch which will export
-dnl # these symbols for use. If your already rolling a custom kernel for
-dnl # your environment this is recommended.
-dnl #
-AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT], [
- SPL_CHECK_SYMBOL_EXPORT(
- [next_online_pgdat],
- [],
- [AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
- [next_online_pgdat() is available])],
- [])
-])
-
-dnl #
-dnl # Proposed API change,
-dnl # This symbol is not available in stock kernels. You may build a
-dnl # custom kernel with the *-spl-export-symbols.patch which will export
-dnl # these symbols for use. If your already rolling a custom kernel for
-dnl # your environment this is recommended.
-dnl #
-AC_DEFUN([SPL_AC_NEXT_ZONE], [
- SPL_CHECK_SYMBOL_EXPORT(
- [next_zone],
- [],
- [AC_DEFINE(HAVE_NEXT_ZONE, 1,
- [next_zone() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.17 API change,
-dnl # See SPL_AC_PGDAT_HELPERS for details.
-dnl #
-AC_DEFUN([SPL_AC_PGDAT_LIST], [
- SPL_CHECK_SYMBOL_EXPORT(
- [pgdat_list],
- [],
- [AC_DEFINE(HAVE_PGDAT_LIST, 1,
- [pgdat_list is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.18 API change,
-dnl # First introduced global_page_state() support as an inline.
-dnl #
-AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
- AC_MSG_CHECKING([whether global_page_state() is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- unsigned long state __attribute__ ((unused));
- state = global_page_state(0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
- [global_page_state() is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.21 API change (plus subsequent naming convention changes),
-dnl # Public global zone stats now include a free page count. However
-dnl # the enumerated names of the counters have changed since this API
-dnl # was introduced. We need to deduce the corrent name to use. This
-dnl # replaces the priviate get_zone_counts() interface.
-dnl #
-dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
-dnl # is 2.6.30 as of when this was written.
-dnl #
-AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
- AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_FREE_PAGES;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
- [Page state NR_FREE_PAGES is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.21 API change (plus subsequent naming convention changes),
-dnl # Public global zone stats now include an inactive page count. However
-dnl # the enumerated names of the counters have changed since this API
-dnl # was introduced. We need to deduce the corrent name to use. This
-dnl # replaces the priviate get_zone_counts() interface.
-dnl #
-dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
-dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
-dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
-dnl #
-AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
- AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_INACTIVE;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
- [Page state NR_INACTIVE is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-
- AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_INACTIVE_ANON;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
- [Page state NR_INACTIVE_ANON is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-
- AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_INACTIVE_FILE;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
- [Page state NR_INACTIVE_FILE is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.21 API change (plus subsequent naming convention changes),
-dnl # Public global zone stats now include an active page count. However
-dnl # the enumerated names of the counters have changed since this API
-dnl # was introduced. We need to deduce the corrent name to use. This
-dnl # replaces the priviate get_zone_counts() interface.
-dnl #
-dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
-dnl # anonymous and file active pages. As of 2.6.28 it was split in
-dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
-dnl #
-AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
- AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_ACTIVE;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
- [Page state NR_ACTIVE is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-
- AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_ACTIVE_ANON;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
- [Page state NR_ACTIVE_ANON is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-
- AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- enum zone_stat_item zsi __attribute__ ((unused));
- zsi = NR_ACTIVE_FILE;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
- [Page state NR_ACTIVE_FILE is available])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # Proposed API change for legacy kernels.
-dnl # This symbol is not available in older kernels. For kernels post
-dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
-dnl # page state information. This symbol is only used in legacy kernels
-dnl # any only as a last resort.
-dnl
-AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
- AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
- SPL_LINUX_TRY_COMPILE([
- ],[
- #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
- #error "global_page_state needs NR_FREE_PAGES"
- #endif
-
- #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
- !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
- !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
- #error "global_page_state needs NR_ACTIVE*"
- #endif
-
- #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
- !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
- !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
- #error "global_page_state needs NR_INACTIVE*"
- #endif
- ],[
- AC_MSG_RESULT(no)
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
- [get_zone_counts() is needed])
-
- SPL_CHECK_SYMBOL_EXPORT(
- [get_zone_counts],
- [],
- [AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
- [get_zone_counts() is available])],
- [])
- ])
-])
-
-dnl #
-dnl # 2.6.27 API change,
-dnl # The user_path_dir() replaces __user_walk()
-dnl #
-AC_DEFUN([SPL_AC_USER_PATH_DIR], [
- SPL_CHECK_SYMBOL_EXPORT(
- [user_path_at],
- [],
- [AC_DEFINE(HAVE_USER_PATH_DIR, 1,
- [user_path_dir() is available])],
- [])
-])
-
-dnl #
-dnl # Symbol available in RHEL kernels not in stock kernels.
-dnl #
-AC_DEFUN([SPL_AC_SET_FS_PWD], [
- SPL_CHECK_SYMBOL_EXPORT(
- [set_fs_pwd],
- [],
- [AC_DEFINE(HAVE_SET_FS_PWD, 1,
- [set_fs_pwd() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.25 API change,
-dnl # Simplied API by replacing mnt+dentry args with a single path arg.
-dnl #
-AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
- [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sched.h>
- #include <linux/fs_struct.h>
- ],[
- set_fs_pwd(NULL, NULL);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
- [set_fs_pwd() wants 2 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # SLES API change, never adopted in mainline,
-dnl # Third 'struct vfsmount *' argument removed.
-dnl #
-AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
- [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/fs.h>
- ],[
- vfs_unlink(NULL, NULL);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
- [vfs_unlink() wants 2 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # SLES API change, never adopted in mainline,
-dnl # Third and sixth 'struct vfsmount *' argument removed.
-dnl #
-AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
- [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/fs.h>
- ],[
- vfs_rename(NULL, NULL, NULL, NULL);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
- [vfs_rename() wants 4 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.36 API change,
-dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
-dnl # a spinlock_t to improve the fastpath performance.
-dnl #
-AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
- AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
- tmp_flags="$EXTRA_KCFLAGS"
- EXTRA_KCFLAGS="-Werror"
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sched.h>
- #include <linux/fs_struct.h>
- ],[
- struct fs_struct fs;
- spin_lock_init(&fs.lock);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
- [struct fs_struct uses spinlock_t])
- ],[
- AC_MSG_RESULT(no)
- ])
- EXTRA_KCFLAGS="$tmp_flags"
-])
-
-dnl #
-dnl # 2.6.29 API change,
-dnl # check whether 'struct cred' exists
-dnl #
-AC_DEFUN([SPL_AC_CRED_STRUCT], [
- AC_MSG_CHECKING([whether struct cred exists])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/cred.h>
- ],[
- struct cred *cr __attribute__ ((unused));
- cr = NULL;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # Custom SPL patch may export this symbol.
-dnl #
-AC_DEFUN([SPL_AC_GROUPS_SEARCH], [
- SPL_CHECK_SYMBOL_EXPORT(
- [groups_search],
- [],
- [AC_DEFINE(HAVE_GROUPS_SEARCH, 1,
- [groups_search() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.x API change,
-dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
-dnl #
-AC_DEFUN([SPL_AC_PUT_TASK_STRUCT], [
- SPL_CHECK_SYMBOL_EXPORT(
- [__put_task_struct],
- [],
- [AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
- [__put_task_struct() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.32 API change,
-dnl # Unused 'struct file *' removed from prototype.
-dnl #
-AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
- AC_MSG_CHECKING([whether proc_handler() wants 5 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/sysctl.h>
- ],[
- proc_dostring(NULL, 0, NULL, NULL, NULL);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
- [proc_handler() wants 5 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.x API change,
-dnl # kvasprintf() function added.
-dnl #
-AC_DEFUN([SPL_AC_KVASPRINTF], [
- SPL_CHECK_SYMBOL_EXPORT(
- [kvasprintf],
- [],
- [AC_DEFINE(HAVE_KVASPRINTF, 1,
- [kvasprintf() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.29 API change,
-dnl # vfs_fsync() funcation added, prior to this use file_fsync().
-dnl #
-AC_DEFUN([SPL_AC_VFS_FSYNC], [
- SPL_CHECK_SYMBOL_EXPORT(
- [vfs_fsync],
- [fs/sync.c],
- [AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.35 API change,
-dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
-dnl #
-AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
- AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/fs.h>
- ],[
- vfs_fsync(NULL, 0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
-dnl # Earlier versions of rwsem_is_locked() were inline and had a race
-dnl # condition. The fixed version is exported as a symbol. The race
-dnl # condition is fixed by acquiring sem->wait_lock, so we must not
-dnl # call that version while holding sem->wait_lock.
-dnl #
-AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED], [
- SPL_CHECK_SYMBOL_EXPORT(
- [rwsem_is_locked],
- [lib/rwsem-spinlock.c],
- [AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
- [rwsem_is_locked() acquires sem->wait_lock])],
- [])
-])
-
-dnl #
-dnl # 2.6.37 API compat,
-dnl # The function invalidate_inodes() is no longer exported by the kernel.
-dnl # The prototype however is still available which means it is safe
-dnl # to acquire the symbol's address using spl_kallsyms_lookup_name().
-dnl #
-dnl # The Proxmox VE kernel contains a patch which renames the function
-dnl # invalidate_inodes() to invalidate_inodes_check(). In the process
-dnl # it adds a 'check' argument and a '#define invalidate_inodes(x)'
-dnl # compatibility wrapper for legacy callers. Therefore, if either
-dnl # of these functions are exported invalidate_inodes() can be
-dnl # safely used.
-dnl #
-AC_DEFUN([SPL_AC_KERNEL_INVALIDATE_INODES], [
- SPL_CHECK_SYMBOL_EXPORT(
- [invalidate_inodes],
- [],
- [AC_DEFINE(HAVE_INVALIDATE_INODES, 1,
- [invalidate_inodes() is available])],
- [])
- SPL_CHECK_SYMBOL_EXPORT(
- [invalidate_inodes_check],
- [],
- [AC_DEFINE(HAVE_INVALIDATE_INODES_CHECK, 1,
- [invalidate_inodes_check() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.39 API compat,
-dnl # The function invalidate_inodes() now take 2 arguments. The second
-dnl # 'kill_dirty' argument describes how invalidate_inodes() should
-dnl # handle dirty inodes. Only when set will dirty inodes be discarded,
-dnl # otherwise they will be handled as busy.
-dnl #
-dnl # Unfortunately, we don't have access to the invalidate_inodes()
-dnl # prototype so it's not easy to check how many arguments it takes.
-dnl # However, this change was done for the benefit of invalidate_device()
-dnl # which also added an argument. The invalidate_device() symbol does
-dnl # exist in the development headers so if it takes two arguments we
-dnl # can fairly safely infer that invalidate_inodes() takes two arguments
-dnl # as well. See commit 93b270f76e7ef3b81001576860c2701931cdc78b.
-dnl #
-AC_DEFUN([SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES],
- [AC_MSG_CHECKING([whether invalidate_inodes() wants 2 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/fs.h>
- ],[
- return __invalidate_device(NULL, 0);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_2ARGS_INVALIDATE_INODES, 1,
- [invalidate_inodes() wants 2 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.xx API compat,
-dnl # There currently exists no exposed API to partially shrink the dcache.
-dnl # The expected mechanism to shrink the cache is a registered shrinker
-dnl # which is called during memory pressure.
-dnl #
-AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY], [
- SPL_CHECK_SYMBOL_EXPORT(
- [shrink_dcache_memory],
- [fs/dcache.c],
- [AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
- [shrink_dcache_memory() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.xx API compat,
-dnl # There currently exists no exposed API to partially shrink the icache.
-dnl # The expected mechanism to shrink the cache is a registered shrinker
-dnl # which is called during memory pressure.
-dnl #
-AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY], [
- SPL_CHECK_SYMBOL_EXPORT(
- [shrink_icache_memory],
- [fs/inode.c],
- [AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
- [shrink_icache_memory() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.39 API compat,
-dnl # The path_lookup() function has been renamed to kern_path_parent()
-dnl # and the flags argument has been removed. The only behavior now
-dnl # offered is that of LOOKUP_PARENT. The spl already always passed
-dnl # this flag so dropping the flag does not impact us.
-dnl #
-AC_DEFUN([SPL_AC_KERN_PATH_PARENT_HEADER], [
- SPL_CHECK_SYMBOL_HEADER(
- [kern_path_parent],
- [int kern_path_parent(const char \*, struct nameidata \*)],
- [include/linux/namei.h],
- [AC_DEFINE(HAVE_KERN_PATH_PARENT_HEADER, 1,
- [kern_path_parent() is available])],
- [])
-])
-
-dnl #
-dnl # 3.1 API compat,
-dnl # The kern_path_parent() symbol is no longer exported by the kernel.
-dnl # However, it remains the prefered interface and since we still have
-dnl # access to the prototype we dynamically lookup the required address.
-dnl #
-AC_DEFUN([SPL_AC_KERN_PATH_PARENT_SYMBOL], [
- SPL_CHECK_SYMBOL_EXPORT(
- [kern_path_parent],
- [fs/namei.c],
- [AC_DEFINE(HAVE_KERN_PATH_PARENT_SYMBOL, 1,
- [kern_path_parent() is available])],
- [])
-])
-
-dnl #
-dnl # 2.6.39 API compat,
-dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
-dnl # This was done to avoid always having to allocate the maximum size
-dnl # workspace (268K). The caller can now specific the windowBits and
-dnl # memLevel compression parameters to get a smaller workspace.
-dnl #
-AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
- [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/zlib.h>
- ],[
- return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
- [zlib_deflate_workspacesize() wants 2 args])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 2.6.39 API change,
-dnl # Shrinker adjust to use common shrink_control structure.
-dnl #
-AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
- AC_MSG_CHECKING([whether struct shrink_control exists])
- SPL_LINUX_TRY_COMPILE([
- #include <linux/mm.h>
- ],[
- struct shrink_control sc __attribute__ ((unused));
-
- sc.nr_to_scan = 0;
- sc.gfp_mask = GFP_KERNEL;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
- [struct shrink_control exists])
- ],[
- AC_MSG_RESULT(no)
- ])
-])
-
-dnl #
-dnl # 3.1 API Change
-dnl #
-dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
-dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
-dnl #
-AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
- AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
- tmp_flags="$EXTRA_KCFLAGS"
- EXTRA_KCFLAGS="-Werror"
- SPL_LINUX_TRY_COMPILE([
- #include <linux/rwsem.h>
- ],[
- struct rw_semaphore dummy_semaphore __attribute__ ((unused));
- raw_spinlock_t dummy_lock __attribute__ ((unused));
- dummy_semaphore.wait_lock = dummy_lock;
- ],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
- [struct rw_semaphore member wait_lock is raw_spinlock_t])
- ],[
- AC_MSG_RESULT(no)
- ])
- EXTRA_KCFLAGS="$tmp_flags"
-])
projects / mirror_spl-debian.git / blobdiff