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| author |   Ingo Molnar <mingo@elte.hu> | 2007-02-16 01:27:28 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-16 08:13:56 -0800 |
| commit | 41cf54455da5e5dc847a9733d49ca23b5e7dd59e (patch) | |
| tree | ea7aa5fe473f4716e4190f7a90a7663535fee312 /include/linux/jiffies.h | |
| parent | [PATCH] Uninline jiffies.h functions (diff) | |
| download | linux-dev-41cf54455da5e5dc847a9733d49ca23b5e7dd59e.tar.xz linux-dev-41cf54455da5e5dc847a9733d49ca23b5e7dd59e.zip | |
[PATCH] Fix multiple conversion bugs in msecs_to_jiffies
Fix multiple conversion bugs in msecs_to_jiffies().
The main problem is that this condition:
if (m > jiffies_to_msecs(MAX_JIFFY_OFFSET))
overflows if HZ is smaller than 1000!
This change is user-visible: for HZ=250 SUS-compliant poll()-timeout
value of -20 is mistakenly converted to 'immediate timeout'.
(The new dyntick code also triggered this, that's how we noticed.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/jiffies.h')
0 files changed, 0 insertions, 0 deletions