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Thomas Gleixner c08b8a4910 [PATCH] sys_alarm() unsigned signed conversion fixup ... alarm() calls the kernel with an unsigend int timeout in seconds. The value is stored in the tv_sec field of a struct timeval to setup the itimer. The tv_sec field of struct timeval is of type long, which causes the tv_sec value to be negative on 32 bit machines if seconds > INT_MAX. Before the hrtimer merge (pre 2.6.16) such a negative value was converted to the maximum jiffies timeout by the timeval_to_jiffies conversion. It's not clear whether this was intended or just happened to be done by the timeval_to_jiffies code. hrtimers expect a timeval in canonical form and treat a negative timeout as already expired. This breaks the legitimate usage of alarm() with a timeout value > INT_MAX seconds. For 32 bit machines it is therefor necessary to limit the internal seconds value to avoid API breakage. Instead of doing this in all implementations of sys_alarm the duplicated sys_alarm code is moved into a common function in itimer.c Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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alpha	…
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cris	…
frv	…
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i386	…
ia64	[PATCH] sys_alarm() unsigned signed conversion fixup	19 years ago
m32r	…
m68k	…
m68knommu	…
mips	[PATCH] sys_alarm() unsigned signed conversion fixup	19 years ago
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v850	…
x86_64	[PATCH] sys_alarm() unsigned signed conversion fixup	19 years ago
xtensa	…