diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2008-02-20 01:03:00 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-25 16:18:57 -0800 |
| commit | 85d1617924607c1311962546bb55367b9edb4ca6 (patch) | |
| tree | 362cf573e037cebae29c915c300e473f282b2dc9 /include | |
| parent | 227db665f6f946d376d48785b08d2b0cd1f21aad (diff) | |
hrtimer: check relative timeouts for overflow
commit: 5a7780e725d1bb4c3094fcc12f1c5c5faea1e988
Various user space callers ask for relative timeouts. While we fixed
that overflow issue in hrtimer_start(), the sites which convert
relative user space values to absolute timeouts themself were uncovered.
Instead of putting overflow checks into each place add a function
which does the sanity checking and convert all affected callers to use
it.
Thanks to Frans Pop, who reported the problem and tested the fixes.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ktime.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ktime.h b/include/linux/ktime.h index a6ddec141f96..816cf4eaa517 100644 --- a/include/linux/ktime.h +++ b/include/linux/ktime.h @@ -310,6 +310,8 @@ static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec) return ktime_sub_ns(kt, usec * 1000); } +extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs); + /* * The resolution of the clocks. The resolution value is returned in * the clock_getres() system call to give application programmers an |