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authorIngo Molnar <mingo@elte.hu>2007-02-16 04:27:28 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-16 11:13:56 -0500
commit41cf54455da5e5dc847a9733d49ca23b5e7dd59e (patch)
treeea7aa5fe473f4716e4190f7a90a7663535fee312 /fs
parent8b9365d753d9870bb6451504c13570b81923228f (diff)
[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>
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