[mirror_zfs.git] / config / kernel-elevator-change.m4

dnl #
dnl # 2.6.36 API, exported elevator_change() symbol
dnl # 4.12 API, removed elevator_change() symbol
dnl #
AC_DEFUN([ZFS_AC_KERNEL_ELEVATOR_CHANGE], [
	AC_MSG_CHECKING([whether elevator_change() is available])
	tmp_flags="$EXTRA_KCFLAGS"
	EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/blkdev.h>
		#include <linux/elevator.h>
	],[
		int ret;
		struct request_queue *q = NULL;
		char *elevator = NULL;
		ret = elevator_change(q, elevator);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_ELEVATOR_CHANGE, 1,
			  [elevator_change() is available])
	],[
		AC_MSG_RESULT(no)
	])
	EXTRA_KCFLAGS="$tmp_flags"
])
Commit	Line	Data
6d1d976b	1	dnl #
1c38ac61 BB	2	dnl # 2.6.36 API, exported elevator_change() symbol
1c38ac61 BB	3	dnl # 4.12 API, removed elevator_change() symbol
6d1d976b BB	4	dnl #
	5	AC_DEFUN([ZFS_AC_KERNEL_ELEVATOR_CHANGE], [
	6	AC_MSG_CHECKING([whether elevator_change() is available])
	7	tmp_flags="$EXTRA_KCFLAGS"
e191b54e	8	EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
6d1d976b BB	9	ZFS_LINUX_TRY_COMPILE([
	10	#include <linux/blkdev.h>
	11	#include <linux/elevator.h>
	12	],[
	13	int ret;
	14	struct request_queue *q = NULL;
	15	char *elevator = NULL;
	16	ret = elevator_change(q, elevator);
	17	],[
	18	AC_MSG_RESULT(yes)
	19	AC_DEFINE(HAVE_ELEVATOR_CHANGE, 1,
	20	[elevator_change() is available])
	21	],[
	22	AC_MSG_RESULT(no)
	23	])
	24	EXTRA_KCFLAGS="$tmp_flags"
	25	])