linux/arch/ia64
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>
2006-03-25 08:22:48 -08:00
..
configs Pull bsp-removal into release branch 2006-03-21 08:16:21 -08:00
dig [PATCH] drive_info removal outside of arch/i386 2006-02-07 20:56:47 -05:00
hp [PATCH] kill _INLINE_ 2006-03-23 07:38:16 -08:00
ia32 [PATCH] sys_alarm() unsigned signed conversion fixup 2006-03-25 08:22:48 -08:00
kernel [PATCH] kill include/linux/platform.h, default_idle() cleanup 2006-03-24 07:33:21 -08:00
lib Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2005-10-28 21:09:26 -07:00
mm [PATCH] hugepage: is_aligned_hugepage_range() cleanup 2006-03-22 07:54:04 -08:00
oprofile [PATCH] remove gcc-2 checks 2006-01-08 20:14:02 -08:00
pci [IA64] Fix pcibios_setup 2006-02-27 15:37:41 -08:00
scripts Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sn [PATCH] s/;;/;/g 2006-03-24 07:33:24 -08:00
defconfig [IA64] refresh default config files 2006-02-27 17:07:14 -08:00
install.sh Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Kconfig Pull bsp-removal into release branch 2006-03-21 08:16:21 -08:00
Kconfig.debug [PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu 2005-11-07 07:53:35 -08:00
Makefile [PATCH] remove gcc-2 checks 2006-01-08 20:14:02 -08:00
module.lds Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00