config/kernel-usleep_range.m4

   1 dnl #
   2 dnl # 2.6.36 API compatibility- Added usleep_range timer.
   3 dnl #
   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 #
   8 AC_DEFUN([ZFS_AC_KERNEL_SRC_USLEEP_RANGE], [
   9         ZFS_LINUX_TEST_SRC([usleep_range], [
  10                 #include <linux/delay.h>
  11         ],[
  12                 usleep_range(0, 0);
  13         ])
  14 ])
  15
  16 AC_DEFUN([ZFS_AC_KERNEL_USLEEP_RANGE], [
  17         AC_MSG_CHECKING([whether usleep_range() is available])
  18         ZFS_LINUX_TEST_RESULT([usleep_range], [
  19                 AC_MSG_RESULT(yes)
  20         ],[
  21                 ZFS_LINUX_TEST_ERROR([usleep_range()])
  22         ])
  23 ])