73 lines
1.8 KiB
Text
73 lines
1.8 KiB
Text
dnl # 4.14-rc3 API change
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dnl # https://lwn.net/Articles/735887/
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dnl #
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dnl # Check if timer_list.func get passed a timer_list or an unsigned long
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dnl # (older kernels). Also sanity check the from_timer() and timer_setup()
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dnl # macros are available as well, since they will be used in the same newer
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dnl # kernels that support the new timer_list.func signature.
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dnl #
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dnl # Also check for the existance of flags in struct timer_list, they were
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dnl # added in 4.1-rc8 via 0eeda71bc30d.
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AC_DEFUN([ZFS_AC_KERNEL_TIMER_SETUP], [
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AC_MSG_CHECKING([whether timer_setup() is available])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/timer.h>
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struct my_task_timer {
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struct timer_list timer;
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int data;
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};
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void task_expire(struct timer_list *tl)
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{
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struct my_task_timer *task_timer = from_timer(task_timer, tl, timer);
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task_timer->data = 42;
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}
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],[
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struct my_task_timer task_timer;
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timer_setup(&task_timer.timer, task_expire, 0);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KERNEL_TIMER_SETUP, 1,
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[timer_setup() is available])
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],[
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AC_MSG_RESULT(no)
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])
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AC_MSG_CHECKING([whether timer function expects timer_list])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/timer.h>
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void task_expire(struct timer_list *tl) {}
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],[
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struct timer_list tl;
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tl.function = task_expire;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KERNEL_TIMER_FUNCTION_TIMER_LIST, 1,
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[timer_list.function gets a timer_list])
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],[
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AC_MSG_RESULT(no)
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])
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AC_MSG_CHECKING([whether struct timer_list has flags])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/timer.h>
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],[
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struct timer_list tl;
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tl.flags = 2;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KERNEL_TIMER_LIST_FLAGS, 1,
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[struct timer_list has a flags member])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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