diff options
Diffstat (limited to 'config/spl-build.m4')
| -rw-r--r-- | config/spl-build.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/config/spl-build.m4 b/config/spl-build.m4 index f54c5b166..b0e334815 100644 --- a/config/spl-build.m4 +++ b/config/spl-build.m4 @@ -93,6 +93,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [ SPL_AC_RWSEM_SPINLOCK_IS_RAW SPL_AC_SCHED_RT_HEADER SPL_AC_2ARGS_VFS_GETATTR + SPL_AC_USLEEP_RANGE ]) AC_DEFUN([SPL_AC_MODULE_SYMVERS], [ @@ -2400,3 +2401,25 @@ AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [ ]) ]) ]) + +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([SPL_AC_USLEEP_RANGE], [ + AC_MSG_CHECKING([whether usleep_range() is available]) + SPL_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) + ]) +]) |