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spl-build.m4
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spl-build.m4
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###############################################################################
# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
# Copyright (C) 2007 The Regents of the University of California.
# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
###############################################################################
# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
###############################################################################
AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_KERNEL
if test "${LINUX_OBJ}" != "${LINUX}"; then
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
fi
AC_SUBST(KERNELMAKE_PARAMS)
KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
AC_SUBST(KERNELCPPFLAGS)
SPL_AC_DEBUG
SPL_AC_DEBUG_KMEM
SPL_AC_DEBUG_KMEM_TRACKING
SPL_AC_ATOMIC_SPINLOCK
SPL_AC_TYPE_ATOMIC64_CMPXCHG
SPL_AC_TYPE_ATOMIC64_XCHG
SPL_AC_TYPE_UINTPTR_T
SPL_AC_3ARGS_INIT_WORK
SPL_AC_2ARGS_REGISTER_SYSCTL
SPL_AC_SET_SHRINKER
SPL_AC_3ARGS_SHRINKER_CALLBACK
SPL_AC_PATH_IN_NAMEIDATA
SPL_AC_TASK_CURR
SPL_AC_CTL_UNNUMBERED
SPL_AC_CTL_NAME
SPL_AC_FLS64
SPL_AC_DEVICE_CREATE
SPL_AC_5ARGS_DEVICE_CREATE
SPL_AC_CLASS_DEVICE_CREATE
SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
SPL_AC_TIMESPEC_SUB
SPL_AC_INIT_UTSNAME
SPL_AC_FDTABLE_HEADER
SPL_AC_FILES_FDTABLE
SPL_AC_UACCESS_HEADER
SPL_AC_KMALLOC_NODE
SPL_AC_MONOTONIC_CLOCK
SPL_AC_INODE_I_MUTEX
SPL_AC_MUTEX_OWNER
SPL_AC_MUTEX_LOCK_NESTED
SPL_AC_3ARGS_ON_EACH_CPU
SPL_AC_KALLSYMS_LOOKUP_NAME
SPL_AC_GET_VMALLOC_INFO
SPL_AC_PGDAT_HELPERS
SPL_AC_FIRST_ONLINE_PGDAT
SPL_AC_NEXT_ONLINE_PGDAT
SPL_AC_NEXT_ZONE
SPL_AC_PGDAT_LIST
SPL_AC_GLOBAL_PAGE_STATE
SPL_AC_ZONE_STAT_ITEM_FREE
SPL_AC_ZONE_STAT_ITEM_INACTIVE
SPL_AC_ZONE_STAT_ITEM_ACTIVE
SPL_AC_GET_ZONE_COUNTS
SPL_AC_USER_PATH_DIR
SPL_AC_SET_FS_PWD
SPL_AC_2ARGS_SET_FS_PWD
SPL_AC_2ARGS_VFS_UNLINK
SPL_AC_4ARGS_VFS_RENAME
SPL_AC_FS_STRUCT_SPINLOCK
SPL_AC_CRED_STRUCT
SPL_AC_GROUPS_SEARCH
SPL_AC_PUT_TASK_STRUCT
SPL_AC_5ARGS_PROC_HANDLER
SPL_AC_KVASPRINTF
SPL_AC_3ARGS_FILE_FSYNC
SPL_AC_EXPORTED_RWSEM_IS_LOCKED
SPL_AC_3ARGS_BLKDEV_GET
SPL_AC_1ARGS_BLKDEV_PUT
SPL_AC_2ARGS_FOLLOW_DOWN
SPL_AC_D_ALLOC_ANON
])
AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
modpost=$LINUX/scripts/Makefile.modpost
AC_MSG_CHECKING([kernel file name for module symbols])
if test -f "$modpost"; then
if grep -q Modules.symvers $modpost; then
LINUX_SYMBOLS=Modules.symvers
else
LINUX_SYMBOLS=Module.symvers
fi
else
LINUX_SYMBOLS=NONE
fi
AC_MSG_RESULT($LINUX_SYMBOLS)
AC_SUBST(LINUX_SYMBOLS)
])
AC_DEFUN([SPL_AC_KERNEL], [
AC_ARG_WITH([linux],
AS_HELP_STRING([--with-linux=PATH],
[Path to kernel source]),
[kernelsrc="$withval"])
AC_ARG_WITH([linux-obj],
AS_HELP_STRING([--with-linux-obj=PATH],
[Path to kernel build objects]),
[kernelbuild="$withval"])
AC_MSG_CHECKING([kernel source directory])
if test -z "$kernelsrc"; then
headersdir="/lib/modules/$(uname -r)/build"
if test -e "$headersdir"; then
sourcelink=$(readlink -f "$headersdir")
else
sourcelink=$(ls -1d /usr/src/kernels/* \
/usr/src/linux-* \
2>/dev/null | grep -v obj | tail -1)
fi
if test -n "$sourcelink" && test -e ${sourcelink}; then
kernelsrc=`readlink -f ${sourcelink}`
else
AC_MSG_RESULT([Not found])
AC_MSG_ERROR([
*** Please make sure the kernel devel package for your distribution
*** is installed then try again. If that fails you can specify the
*** location of the kernel source with the '--with-linux=PATH' option.])
fi
else
if test "$kernelsrc" = "NONE"; then
kernsrcver=NONE
fi
fi
AC_MSG_RESULT([$kernelsrc])
AC_MSG_CHECKING([kernel build directory])
if test -z "$kernelbuild"; then
if test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
kernelbuild=${kernelsrc}-obj/${target_cpu}/default
elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
else
kernelbuild=${kernelsrc}
fi
fi
AC_MSG_RESULT([$kernelbuild])
AC_MSG_CHECKING([kernel source version])
utsrelease1=$kernelbuild/include/linux/version.h
utsrelease2=$kernelbuild/include/linux/utsrelease.h
utsrelease3=$kernelbuild/include/generated/utsrelease.h
if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
utsrelease=linux/version.h
elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
utsrelease=linux/utsrelease.h
elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
utsrelease=generated/utsrelease.h
fi
if test "$utsrelease"; then
kernsrcver=`(echo "#include <$utsrelease>";
echo "kernsrcver=UTS_RELEASE") |
cpp -I $kernelbuild/include |
grep "^kernsrcver=" | cut -d \" -f 2`
if test -z "$kernsrcver"; then
AC_MSG_RESULT([Not found])
AC_MSG_ERROR([*** Cannot determine kernel version.])
fi
else
AC_MSG_RESULT([Not found])
AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
fi
AC_MSG_RESULT([$kernsrcver])
LINUX=${kernelsrc}
LINUX_OBJ=${kernelbuild}
LINUX_VERSION=${kernsrcver}
AC_SUBST(LINUX)
AC_SUBST(LINUX_OBJ)
AC_SUBST(LINUX_VERSION)
SPL_AC_MODULE_SYMVERS
])
dnl #
dnl # Explicitly check for gawk, we require it for the the usermode
dnl # helper. For some reason the standard awk command does not
dnl # behave correctly when invoked from the usermode helper.
dnl #
AC_DEFUN([SPL_AC_GAWK], [
AS_IF([test "x$AWK" != xgawk], [
AC_MSG_ERROR([
*** Required util gawk missing. Please install the required
*** gawk package for your distribution and try again.])
])
])
dnl #
dnl # Default SPL user configuration
dnl #
AC_DEFUN([SPL_AC_CONFIG_USER], [
SPL_AC_GAWK
])
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 # RPM packages and will be warned if you try too.
dnl #
AC_DEFUN([SPL_AC_RPM], [
RPM=rpm
RPMBUILD=rpmbuild
AC_MSG_CHECKING([whether $RPM is available])
AS_IF([tmp=$($RPM --version 2>/dev/null)], [
RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
HAVE_RPM=yes
AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
],[
HAVE_RPM=no
AC_MSG_RESULT([$HAVE_RPM])
])
AC_MSG_CHECKING([whether $RPMBUILD is available])
AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
HAVE_RPMBUILD=yes
AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
],[
HAVE_RPMBUILD=no
AC_MSG_RESULT([$HAVE_RPMBUILD])
])
AC_SUBST(HAVE_RPM)
AC_SUBST(RPM)
AC_SUBST(RPM_VERSION)
AC_SUBST(HAVE_RPMBUILD)
AC_SUBST(RPMBUILD)
AC_SUBST(RPMBUILD_VERSION)
])
dnl #
dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
dnl # tools are missing it is non-fatal but you will not be able to build
dnl # DEB packages and will be warned if you try too.
dnl #
AC_DEFUN([SPL_AC_DPKG], [
DPKG=dpkg
DPKGBUILD=dpkg-buildpackage
AC_MSG_CHECKING([whether $DPKG is available])
AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
HAVE_DPKG=yes
AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
],[
HAVE_DPKG=no
AC_MSG_RESULT([$HAVE_DPKG])
])
AC_MSG_CHECKING([whether $DPKGBUILD is available])
AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
DPKGBUILD_VERSION=$(echo $tmp | \
$AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
HAVE_DPKGBUILD=yes
AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
],[
HAVE_DPKGBUILD=no
AC_MSG_RESULT([$HAVE_DPKGBUILD])
])
AC_SUBST(HAVE_DPKG)
AC_SUBST(DPKG)
AC_SUBST(DPKG_VERSION)
AC_SUBST(HAVE_DPKGBUILD)
AC_SUBST(DPKGBUILD)
AC_SUBST(DPKGBUILD_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 # convert the RPM packages to the needed package type. This is
dnl # a hack but so far it has worked reasonable well.
dnl #
AC_DEFUN([SPL_AC_ALIEN], [
ALIEN=alien
AC_MSG_CHECKING([whether $ALIEN is available])
AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
HAVE_ALIEN=yes
AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
],[
HAVE_ALIEN=no
AC_MSG_RESULT([$HAVE_ALIEN])
])
AC_SUBST(HAVE_ALIEN)
AC_SUBST(ALIEN)
AC_SUBST(ALIEN_VERSION)
])
dnl #
dnl # Using the VENDOR tag from config.guess set the default
dnl # package type for 'make pkg': (rpm | deb | tgz)
dnl #
AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
AC_MSG_CHECKING([linux distribution])
if test -f /etc/redhat-release ; then
VENDOR=redhat ;
elif test -f /etc/fedora-release ; then
VENDOR=fedora ;
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 ;
else
VENDOR= ;
fi
AC_MSG_RESULT([$VENDOR])
AC_SUBST(VENDOR)
AC_MSG_CHECKING([default package type])
case "$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 ;;
*) DEFAULT_PACKAGE=rpm ;;
esac
AC_MSG_RESULT([$DEFAULT_PACKAGE])
AC_SUBST(DEFAULT_PACKAGE)
])
dnl #
dnl # Default SPL user configuration
dnl #
AC_DEFUN([SPL_AC_PACKAGE], [
SPL_AC_RPM
SPL_AC_DPKG
SPL_AC_ALIEN
SPL_AC_DEFAULT_PACKAGE
])
AC_DEFUN([SPL_AC_LICENSE], [
AC_MSG_CHECKING([spl license])
LICENSE=GPL
AC_MSG_RESULT([$LICENSE])
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
AC_SUBST(LICENSE)
])
AC_DEFUN([SPL_AC_CONFIG], [
SPL_CONFIG=all
AC_ARG_WITH([config],
AS_HELP_STRING([--with-config=CONFIG],
[Config file 'kernel|user|all|srpm']),
[SPL_CONFIG="$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 ;;
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 "$SPL_CONFIG" = all])
])
dnl #
dnl # Enable if the SPL should be compiled with internal debugging enabled.
dnl # By default this support is disabled.
dnl #
AC_DEFUN([SPL_AC_DEBUG], [
AC_MSG_CHECKING([whether debugging is enabled])
AC_ARG_ENABLE([debug],
[AS_HELP_STRING([--enable-debug],
[Enable generic debug support @<:@default=no@:>@])],
[],
[enable_debug=no])
AS_IF([test "x$enable_debug" = xyes],
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
DEBUG_CFLAGS="-DDEBUG -Werror"
],
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
DEBUG_CFLAGS="-DNDEBUG"
])
AC_SUBST(DEBUG_CFLAGS)
AC_MSG_RESULT([$enable_debug])
])
dnl #
dnl # Enabled by default it provides a minimal level of memory tracking.
dnl # A total count of bytes allocated is kept for each alloc and free.
dnl # Then at module unload time a report to the console will be printed
dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
dnl # and provide an easy way to inspect the kmem based slab.
dnl #
AC_DEFUN([SPL_AC_DEBUG_KMEM], [
AC_ARG_ENABLE([debug-kmem],
[AS_HELP_STRING([--enable-debug-kmem],
[Enable basic kmem accounting @<:@default=yes@:>@])],
[],
[enable_debug_kmem=yes])
AS_IF([test "x$enable_debug_kmem" = xyes],
[AC_DEFINE([DEBUG_KMEM], [1],
[Define to 1 to enable basic kmem accounting])
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"])
AC_MSG_CHECKING([whether basic kmem accounting is enabled])
AC_MSG_RESULT([$enable_debug_kmem])
])
dnl #
dnl # Disabled by default it provides detailed memory tracking. This
dnl # feature also requires --enable-debug-kmem to be set. When enabled
dnl # not only will total bytes be tracked but also the location of every
dnl # alloc and free. When the SPL module is unloaded a list of all leaked
dnl # addresses and where they were allocated will be dumped to the console.
dnl # Enabling this feature has a significant impact on performance but it
dnl # makes finding memory leaks pretty straight forward.
dnl #
AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
AC_ARG_ENABLE([debug-kmem-tracking],
[AS_HELP_STRING([--enable-debug-kmem-tracking],
[Enable detailed kmem tracking @<:@default=no@:>@])],
[],
[enable_debug_kmem_tracking=no])
AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
[AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
[Define to 1 to enable detailed kmem tracking])
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"])
AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
AC_MSG_RESULT([$enable_debug_kmem_tracking])
])
dnl #
dnl # SPL_LINUX_CONFTEST
dnl #
AC_DEFUN([SPL_LINUX_CONFTEST], [
cat confdefs.h - <<_ACEOF >conftest.c
$1
_ACEOF
])
dnl #
dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
dnl #
m4_define([SPL_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;
}
])
dnl #
dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
dnl #
AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
rm -Rf build && mkdir -p build
echo "obj-m := conftest.o" >build/Makefile
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])]
)
rm -Rf build
])
dnl #
dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
dnl #
AC_DEFUN([SPL_LINUX_TRY_COMPILE],
[SPL_LINUX_COMPILE_IFELSE(
[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
[modules],
[test -s build/conftest.o],
[$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([
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
],[
#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])
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
$LINUX_OBJ/Module*.symvers 2>/dev/null
rc=$?
if test $rc -ne 0; then
export=0
for file in $2; do
grep -q -E "EXPORT_SYMBOL.*($1)" \
"$LINUX_OBJ/$file" 2>/dev/null
rc=$?
if test $rc -eq 0; then
export=1
break;
fi
done
if test $export -eq 0; then
AC_MSG_RESULT([no])
$4
else
AC_MSG_RESULT([yes])
$3
fi
else
AC_MSG_RESULT([yes])
$3
fi
])
dnl #
dnl # SPL_CHECK_HEADER
dnl # check whether header exists and define HAVE_$2_HEADER
dnl #
AC_DEFUN([SPL_CHECK_HEADER],
[AC_MSG_CHECKING([whether header $1 exists])
SPL_LINUX_TRY_COMPILE([
#include <$1>
],[
return 0;
],[
AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
AC_MSG_RESULT(yes)
$3
],[
AC_MSG_RESULT(no)
$4
])
])
dnl #
dnl # Use the atomic implemenation based on global spinlocks. This
dnl # should only be needed by 32-bit kernels which do not provide
dnl # the atomic64_* API. It may be optionally enabled as a fallback
dnl # if problems are observed with the direct mapping to the native
dnl # Linux atomic operations. You may not disable atomic spinlocks
dnl # if you kernel does not an atomic64_* API.
dnl #
AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
AC_ARG_ENABLE([atomic-spinlocks],
[AS_HELP_STRING([--enable-atomic-spinlocks],
[Atomic types use spinlocks @<:@default=check@:>@])],
[],
[enable_atomic_spinlocks=check])
SPL_LINUX_TRY_COMPILE([
#include <asm/atomic.h>
],[
atomic64_t *ptr;
],[
have_atomic64_t=yes
AC_DEFINE(HAVE_ATOMIC64_T, 1,
[kernel defines atomic64_t])
],[
have_atomic64_t=no
])
AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
AS_IF([test "x$have_atomic64_t" = xyes], [
enable_atomic_spinlocks=no
],[
enable_atomic_spinlocks=yes
])
])
AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
AC_DEFINE([ATOMIC_SPINLOCK], [1],
[Atomic types use spinlocks])
],[
AS_IF([test "x$have_atomic64_t" = xno], [
AC_MSG_FAILURE(
[--disable-atomic-spinlocks given but required atomic64 support is unavailable])
])
])
AC_MSG_CHECKING([whether atomic types use spinlocks])
AC_MSG_RESULT([$enable_atomic_spinlocks])
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;
],[
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;
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>
],[
return 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;
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;
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, b, c = { 0 };
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 = init_utsname();
],[
AC_MSG_RESULT(yes)