[mirror_zfs.git] / config / kernel-urange-sleep.m4

dnl #
dnl # 2.6.36 API compatibility.
dnl # Added usleep_range timer.
dnl # usleep_range is a finer precision implementation of msleep
dnl # designed to be a drop-in replacement for udelay where a precise
dnl # sleep / busy-wait is unnecessary.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_USLEEP_RANGE], [
	AC_MSG_CHECKING([whether usleep_range() is available])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/delay.h>
	],[
		usleep_range(0, 0);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_USLEEP_RANGE, 1,
		          [usleep_range is available])
	],[
		AC_MSG_RESULT(no)
	])
])
Commit	Line	Data
48ef8ba0 BB	1	dnl #
	2	dnl # 2.6.36 API compatibility.
	3	dnl # Added usleep_range timer.
	4	dnl # usleep_range is a finer precision implementation of msleep
	5	dnl # designed to be a drop-in replacement for udelay where a precise
	6	dnl # sleep / busy-wait is unnecessary.
	7	dnl #
93ce2b4c	8	AC_DEFUN([ZFS_AC_KERNEL_USLEEP_RANGE], [
48ef8ba0	9	AC_MSG_CHECKING([whether usleep_range() is available])
93ce2b4c	10	ZFS_LINUX_TRY_COMPILE([
48ef8ba0 BB	11	#include <linux/delay.h>
	12	],[
	13	usleep_range(0, 0);
	14	],[
	15	AC_MSG_RESULT(yes)
	16	AC_DEFINE(HAVE_USLEEP_RANGE, 1,
	17	[usleep_range is available])
	18	],[
	19	AC_MSG_RESULT(no)
	20	])
	21	])