diff options
| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-12-07 11:01:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-12-07 11:01:26 -0800 |
| commit | 2c5ea0f2d8c7d4883dd0d8ec3c7e3f3640b4f814 (patch) | |
| tree | f6412441325195c16351822cff8da5f2ed5f1cfe /kernel | |
| parent | fa2dd441df28b9fdfc68f84ae66f1b507cfff0e4 (diff) | |
| parent | e17bcb43a26a7111f851b5ff6d1258ecd355de75 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
ACPI: move timer broadcast before busmaster disable
clockevents: warn once when program_event() is called with negative expiry
hrtimers: avoid overflow for large relative timeouts
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/hrtimer.c | 8 | ||||
| -rw-r--r-- | kernel/time/clockevents.c | 5 |
2 files changed, 13 insertions, 0 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 22a25142e4cf..e65dd0b47cdc 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -850,6 +850,14 @@ hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode) #ifdef CONFIG_TIME_LOW_RES tim = ktime_add(tim, base->resolution); #endif + /* + * Careful here: User space might have asked for a + * very long sleep, so the add above might result in a + * negative number, which enqueues the timer in front + * of the queue. + */ + if (tim.tv64 < 0) + tim.tv64 = KTIME_MAX; } timer->expires = tim; diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 822beebe664a..5fb139fef9fa 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -78,6 +78,11 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires, unsigned long long clc; int64_t delta; + if (unlikely(expires.tv64 < 0)) { + WARN_ON_ONCE(1); + return -ETIME; + } + delta = ktime_to_ns(ktime_sub(expires, now)); if (delta <= 0) |