mirror_zfs/config/kernel-sched.m4
Brian Behlendorf 48ef8ba070
Split spl-build.m4
Split the kernel interface configure checks in to seperate m4
macro files.  This is intended to facilitate moving the spl
source code in to the zfs repository.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #682
2018-02-07 11:50:24 -08:00

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dnl #
dnl # 3.9 API change,
dnl # Moved things from linux/sched.h to linux/sched/rt.h
dnl #
AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
[AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/sched/rt.h>
],[
return 0;
],[
AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.11 API change,
dnl # Moved things from linux/sched.h to linux/sched/signal.h
dnl #
AC_DEFUN([SPL_AC_SCHED_SIGNAL_HEADER],
[AC_MSG_CHECKING([whether header linux/sched/signal.h exists])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/sched/signal.h>
],[
return 0;
],[
AC_DEFINE(HAVE_SCHED_SIGNAL_HEADER, 1, [linux/sched/signal.h exists])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.19 API change
dnl # The io_schedule_timeout() function is present in all 2.6.32 kernels
dnl # but it was not exported until Linux 3.19. The RHEL 7.x kernels which
dnl # are based on a 3.10 kernel do export this symbol.
dnl #
AC_DEFUN([SPL_AC_IO_SCHEDULE_TIMEOUT], [
AC_MSG_CHECKING([whether io_schedule_timeout() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/sched.h>
], [
(void) io_schedule_timeout(1);
], [io_schedule_timeout], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IO_SCHEDULE_TIMEOUT, 1, [yes])
],[
AC_MSG_RESULT(no)
])
])