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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-03-06 18:42:42 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-06 21:40:44 -0500
commitf7c09bd972b7111b8c69bf57a189571edd4d4a7d (patch)
treebc06c2cdf607746f8c9858b9771895a02f27a0b2 /arch/i386/kernel/time.c
parentb05121b29e8af45ccb424bf71dadc1d04bd23f03 (diff)
[PATCH] x86: fix potential jiffies overflow in timer_resume()
i386 timer_resume is updating jiffies, not jiffies_64. It looks there is a potential overflow problem. And jiffies_64 and wall_jiffies should be protected by xtime_lock. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/time.c')
-rw-r--r--arch/i386/kernel/time.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c
index a14d594bfbeb..9d3074759856 100644
--- a/arch/i386/kernel/time.c
+++ b/arch/i386/kernel/time.c
@@ -412,9 +412,9 @@ static int timer_resume(struct sys_device *dev)
412 write_seqlock_irqsave(&xtime_lock, flags); 412 write_seqlock_irqsave(&xtime_lock, flags);
413 xtime.tv_sec = sec; 413 xtime.tv_sec = sec;
414 xtime.tv_nsec = 0; 414 xtime.tv_nsec = 0;
415 write_sequnlock_irqrestore(&xtime_lock, flags); 415 jiffies_64 += sleep_length;
416 jiffies += sleep_length;
417 wall_jiffies += sleep_length; 416 wall_jiffies += sleep_length;
417 write_sequnlock_irqrestore(&xtime_lock, flags);
418 if (last_timer->resume) 418 if (last_timer->resume)
419 last_timer->resume(); 419 last_timer->resume();
420 cur_timer = last_timer; 420 cur_timer = last_timer;