22 lines
560 B
Text
22 lines
560 B
Text
|
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)
|
||
|
|
])
|
||
|
|
])
|