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Diffstat (limited to 'config/kernel-usleep_range.m4')
| -rw-r--r-- | config/kernel-usleep_range.m4 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/config/kernel-usleep_range.m4 b/config/kernel-usleep_range.m4 new file mode 100644 index 000000000..5bf051ab4 --- /dev/null +++ b/config/kernel-usleep_range.m4 @@ -0,0 +1,24 @@ +dnl # +dnl # 2.6.36 API compatibility- Added usleep_range timer. +dnl # +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_SRC_USLEEP_RANGE], [ + ZFS_LINUX_TEST_SRC([usleep_range], [ + #include <linux/delay.h> + ],[ + usleep_range(0, 0); + ]) +]) + +AC_DEFUN([ZFS_AC_KERNEL_USLEEP_RANGE], [ + AC_MSG_CHECKING([whether usleep_range() is available]) + ZFS_LINUX_TEST_RESULT([usleep_range], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_USLEEP_RANGE, 1, [usleep_range is available]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |