]>
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 | ]) |