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https://git.proxmox.com/git/mirror_zfs.git
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2e0e7e6976
- Allow checking for exported symbols in both Module.symvers and Module.symvers. My stock SLES kernel ships an objects directory with Module.symvers, yet produces a Module.symvers in the local build directory.
1003 lines
24 KiB
Plaintext
1003 lines
24 KiB
Plaintext
AC_DEFUN([SPL_AC_KERNEL], [
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AC_ARG_WITH([linux],
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AS_HELP_STRING([--with-linux=PATH],
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[Path to kernel source]),
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[kernelsrc="$withval"])
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AC_ARG_WITH([linux-obj],
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AS_HELP_STRING([--with-linux-obj=PATH],
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[Path to kernel build objects]),
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[kernelbuild="$withval"])
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AC_MSG_CHECKING([kernel source directory])
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if test -z "$kernelsrc"; then
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sourcelink=`ls -1d /usr/src/kernels/* /usr/src/linux-* \
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2>/dev/null | grep -v obj | tail -1`
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if test -e ${sourcelink}; then
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kernelsrc=`readlink -f ${sourcelink}`
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else
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AC_MSG_RESULT([Not found])
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AC_MSG_ERROR([
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*** Please specify the location of the kernel source
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*** with the '--with-linux=PATH' option])
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fi
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else
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if test "$kernelsrc" = "NONE"; then
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kernsrcver=NONE
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fi
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fi
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AC_MSG_RESULT([$kernelsrc])
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AC_MSG_CHECKING([kernel build directory])
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if test -z "$kernelbuild"; then
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if test -d ${kernelsrc}-obj; then
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kernelbuild=${kernelsrc}-obj/`arch`/`arch`
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elif test -d `dirname ${kernelsrc}`/build-`arch`; then
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kernelbuild=`dirname ${kernelsrc}`/build-`arch`
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else
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kernelbuild=${kernelsrc}
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fi
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fi
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AC_MSG_RESULT([$kernelbuild])
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AC_MSG_CHECKING([kernel source version])
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if test -r $kernelbuild/include/linux/version.h &&
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fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then
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kernsrcver=`(echo "#include <linux/version.h>";
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echo "kernsrcver=UTS_RELEASE") |
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cpp -I $kernelbuild/include |
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grep "^kernsrcver=" | cut -d \" -f 2`
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elif test -r $kernelbuild/include/linux/utsrelease.h &&
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fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then
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kernsrcver=`(echo "#include <linux/utsrelease.h>";
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echo "kernsrcver=UTS_RELEASE") |
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cpp -I $kernelbuild/include |
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grep "^kernsrcver=" | cut -d \" -f 2`
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fi
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if test -z "$kernsrcver"; then
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AC_MSG_RESULT([Not found])
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AC_MSG_ERROR([
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*** Cannot determine the version of the linux kernel source.
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*** Please prepare the kernel before running this script])
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fi
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AC_MSG_RESULT([$kernsrcver])
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LINUX=${kernelsrc}
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LINUX_OBJ=${kernelbuild}
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LINUX_VERSION=${kernsrcver}
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abs_srcdir=`readlink -f ${srcdir}`
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kerninclude="-I${abs_srcdir} -I${abs_srcdir}/include"
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kernwarn="-Wstrict-prototypes -Werror"
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if test "${LINUX_OBJ}" != "${LINUX}"; then
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kernobjs="O=$kernelbuild"
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fi
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KERNELCFLAGS=
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KERNELCPPFLAGS="${kerninclude} ${kernwarn}"
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KERNELMAKE_PARAMS="${kernobjs}"
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AC_SUBST(LINUX)
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AC_SUBST(LINUX_OBJ)
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AC_SUBST(LINUX_VERSION)
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AC_SUBST(KERNELMAKE_PARAMS)
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AC_SUBST(KERNELCPPFLAGS)
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AC_SUBST(KERNELCFLAGS)
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])
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AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
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AC_MSG_CHECKING([kernel file name for module symbols])
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if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost; then
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LINUX_SYMBOLS=Modules.symvers
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else
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LINUX_SYMBOLS=Module.symvers
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fi
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AC_MSG_RESULT($LINUX_SYMBOLS)
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AC_SUBST(LINUX_SYMBOLS)
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])
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AC_DEFUN([SPL_AC_LICENSE], [
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AC_MSG_CHECKING([license])
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AC_MSG_RESULT([GPL])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
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])
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AC_DEFUN([SPL_AC_DEBUG], [
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AC_MSG_CHECKING([whether debugging is enabled])
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AC_ARG_ENABLE( [debug],
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AS_HELP_STRING([--enable-debug],
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[Enable generic debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug=yes ;;
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no) spl_ac_debug=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
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esac ]
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)
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if test "$spl_ac_debug" = yes; then
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AC_MSG_RESULT([yes])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG"
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else
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AC_MSG_RESULT([no])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
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fi
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])
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AC_DEFUN([SPL_AC_DEBUG_KMEM], [
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AC_MSG_CHECKING([whether kmem debugging is enabled])
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AC_ARG_ENABLE( [debug-kmem],
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AS_HELP_STRING([--enable-debug-kmem],
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[Enable kmem debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug_kmem=yes ;;
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no) spl_ac_debug_kmem=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kmem]) ;;
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esac ]
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)
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if test "$spl_ac_debug_kmem" = yes; then
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AC_MSG_RESULT([yes])
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AC_DEFINE([DEBUG_KMEM], [1],
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[Define to 1 to enable kmem debugging])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
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else
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AC_MSG_RESULT([no])
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fi
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])
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AC_DEFUN([SPL_AC_DEBUG_MUTEX], [
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AC_MSG_CHECKING([whether mutex debugging is enabled])
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AC_ARG_ENABLE( [debug-mutex],
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AS_HELP_STRING([--enable-debug-mutex],
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[Enable mutex debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug_mutex=yes ;;
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no) spl_ac_debug_mutex=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-mutex]) ;;
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esac ]
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)
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if test "$spl_ac_debug_mutex" = yes; then
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AC_MSG_RESULT([yes])
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AC_DEFINE([DEBUG_MUTEX], [1],
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[Define to 1 to enable mutex debugging])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_MUTEX"
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else
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AC_MSG_RESULT([no])
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fi
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])
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AC_DEFUN([SPL_AC_DEBUG_KSTAT], [
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AC_MSG_CHECKING([whether kstat debugging is enabled])
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AC_ARG_ENABLE( [debug-kstat],
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AS_HELP_STRING([--enable-debug-kstat],
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[Enable kstat debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug_kstat=yes ;;
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no) spl_ac_debug_kstat=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kstat]) ;;
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esac ]
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)
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if test "$spl_ac_debug_kstat" = yes; then
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AC_MSG_RESULT([yes])
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AC_DEFINE([DEBUG_KSTAT], [1],
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[Define to 1 to enable kstat debugging])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KSTAT"
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else
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AC_MSG_RESULT([no])
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fi
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])
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AC_DEFUN([SPL_AC_DEBUG_CALLB], [
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AC_MSG_CHECKING([whether callb debugging is enabled])
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AC_ARG_ENABLE( [debug-callb],
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AS_HELP_STRING([--enable-debug-callb],
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[Enable callb debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug_callb=yes ;;
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no) spl_ac_debug_callb=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-callb]) ;;
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esac ]
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)
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if test "$spl_ac_debug_callb" = yes; then
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AC_MSG_RESULT([yes])
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AC_DEFINE([DEBUG_CALLB], [1],
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[Define to 1 to enable callb debugging])
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_CALLB"
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl #
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dnl # SPL_LINUX_CONFTEST
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dnl #
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AC_DEFUN([SPL_LINUX_CONFTEST], [
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cat >conftest.c <<_ACEOF
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$1
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_ACEOF
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])
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dnl #
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dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
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dnl #
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m4_define([SPL_LANG_PROGRAM], [
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$1
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int
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main (void)
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{
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dnl Do *not* indent the following line: there may be CPP directives.
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dnl Don't move the `;' right after for the same reason.
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$2
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;
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return 0;
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}
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])
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dnl #
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dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
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dnl #
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AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
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m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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AS_IF(
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[AC_TRY_COMMAND(cp conftest.c build && make [$2] LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
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[$4],
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[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
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)
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rm -Rf build
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])
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dnl #
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dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
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dnl #
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AC_DEFUN([SPL_LINUX_TRY_COMPILE],
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[SPL_LINUX_COMPILE_IFELSE(
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[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
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[modules],
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[test -s build/conftest.o],
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[$3], [$4])
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])
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dnl #
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dnl # SPL_LINUX_CONFIG
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dnl #
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AC_DEFUN([SPL_LINUX_CONFIG],
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[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
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SPL_LINUX_TRY_COMPILE([
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#ifndef AUTOCONF_INCLUDED
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#include <linux/config.h>
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#endif
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],[
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#ifndef CONFIG_$1
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#error CONFIG_$1 not #defined
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#endif
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],[
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AC_MSG_RESULT([yes])
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$2
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],[
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AC_MSG_RESULT([no])
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$3
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])
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])
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dnl #
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dnl # SPL_CHECK_SYMBOL_EXPORT
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dnl # check symbol exported or not
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dnl #
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AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
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[AC_MSG_CHECKING([whether symbol $1 is exported])
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grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
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$LINUX_OBJ/Module*.symvers 2>/dev/null
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rc=$?
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if test $rc -ne 0; then
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export=0
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for file in $2; do
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grep -q -E "EXPORT_SYMBOL.*($1)" \
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"$LINUX_OBJ/$file" 2>/dev/null
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rc=$?
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if test $rc -eq 0; then
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export=1
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break;
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fi
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done
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if test $export -eq 0; then
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AC_MSG_RESULT([no])
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$4
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else
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AC_MSG_RESULT([yes])
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$3
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fi
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else
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AC_MSG_RESULT([yes])
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$3
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fi
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])
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dnl #
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dnl # SPL_CHECK_HEADER
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dnl # check whether header exists and define HAVE_$2_HEADER
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dnl #
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AC_DEFUN([SPL_CHECK_HEADER],
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[AC_MSG_CHECKING([whether header $1 exists])
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SPL_LINUX_TRY_COMPILE([
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#include <$1>
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],[
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return 0;
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],[
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AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
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AC_MSG_RESULT(yes)
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$3
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],[
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AC_MSG_RESULT(no)
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$4
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])
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])
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dnl #
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dnl # 2.6.24 API change,
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dnl # check if uintptr_t typedef is defined
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dnl #
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AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
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[AC_MSG_CHECKING([whether kernel defines uintptr_t])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/types.h>
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],[
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uintptr_t *ptr;
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],[
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_UINTPTR_T, 1,
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[kernel defines uintptr_t])
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],[
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AC_MSG_RESULT([no])
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])
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])
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dnl #
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dnl # 2.6.x API change,
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dnl # check if atomic64_t typedef is defined
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dnl #
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AC_DEFUN([SPL_AC_TYPE_ATOMIC64_T],
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[AC_MSG_CHECKING([whether kernel defines atomic64_t])
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SPL_LINUX_TRY_COMPILE([
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#include <asm/atomic.h>
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],[
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atomic64_t *ptr;
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],[
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_ATOMIC64_T, 1,
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[kernel defines atomic64_t])
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],[
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AC_MSG_RESULT([no])
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])
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])
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dnl #
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dnl # 2.6.20 API change,
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dnl # INIT_WORK use 2 args and not store data inside
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dnl #
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AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
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[AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/workqueue.h>
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],[
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struct work_struct work;
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INIT_WORK(&work, NULL, NULL);
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],[
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AC_MSG_RESULT(yes)
|
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AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
|
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[INIT_WORK wants 3 args])
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],[
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AC_MSG_RESULT(no)
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])
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])
|
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|
|
dnl #
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dnl # 2.6.21 API change,
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dnl # 'register_sysctl_table' use only one argument instead of two
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dnl #
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AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
|
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[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
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#include <linux/sysctl.h>
|
|
],[
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return register_sysctl_table(NULL,0);
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],[
|
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AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
|
|
[register_sysctl_table() wants 2 args])
|
|
],[
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|
AC_MSG_RESULT(no)
|
|
])
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|
])
|
|
|
|
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>
|
|
],[
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|
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 # 2.6.25 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 # 2.6.16 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)
|
|
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 = 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 = 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 # 2.6.18 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 # 2.6.22 API change,
|
|
dnl # First introduced 'div64_64()' in lib/div64.c
|
|
dnl
|
|
AC_DEFUN([SPL_AC_DIV64_64], [
|
|
SPL_CHECK_SYMBOL_EXPORT(
|
|
[div64_64],
|
|
[],
|
|
[AC_DEFINE(HAVE_DIV64_64, 1,
|
|
[div64_64() is available])],
|
|
[])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.26 API change,
|
|
dnl # Renamed 'div64_64()' to 'div64_u64' in lib/div64.c
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DIV64_U64], [
|
|
SPL_CHECK_SYMBOL_EXPORT(
|
|
[div64_u64],
|
|
[],
|
|
[AC_DEFINE(HAVE_DIV64_U64, 1,
|
|
[div64_u64() is available])],
|
|
[])
|
|
])
|
|
|
|
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 # 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_ZONE_COUNTS], [
|
|
SPL_CHECK_SYMBOL_EXPORT(
|
|
[get_zone_counts],
|
|
[],
|
|
[AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
|
|
[get_zone_counts() 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/vmstat.h>
|
|
],[
|
|
unsigned long state;
|
|
state = global_page_state(NR_FREE_PAGES);
|
|
],[
|
|
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,
|
|
dnl # Public global zone stats now include free/inactive/active page
|
|
dnl # counts. This replaced the priviate get_zone_counts() interface.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FIA], [
|
|
AC_MSG_CHECKING([whether free/inactive/active page state is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mmzone.h>
|
|
],[
|
|
enum zone_stat_item i1, i2, i3;
|
|
i1 = NR_FREE_PAGES;
|
|
i2 = NR_INACTIVE;
|
|
i3 = NR_ACTIVE;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_ZONE_STAT_ITEM_FIA, 1,
|
|
[free/inactive/active page state is available])
|
|
],[
|
|
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)
|
|
])
|
|
])
|