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History

Mikulas Patocka 54c028419d time: Fix overflow when HZ is smaller than 60

commit 80d767d770fd9c697e434fd080c2db7b5c60c6dd upstream.

When compiling for the IA-64 ski emulator, HZ is set to 32 because the
emulation is slow and we don't want to waste too many cycles processing
timers. Alpha also has an option to set HZ to 32.

This causes integer underflow in
kernel/time/jiffies.c:
kernel/time/jiffies.c:66:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
  .mult  = NSEC_PER_JIFFY << JIFFIES_SHIFT, /* details above */
  ^

This patch reduces the JIFFIES_SHIFT value to avoid the overflow.

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Link: http://lkml.kernel.org/r/alpine.LRH.2.02.1401241639100.23871@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-02-22 13:34:59 -08:00

alarmtimer.c

alarmtimer: return EINVAL instead of ENOTSUPP if rtcdev doesn't exist

2013-10-18 16:23:58 -07:00

clockevents.c

Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-11-12 10:36:00 +09:00

clocksource.c

time: Fix signedness bug in sysfs_get_uname() and its callers

2013-10-18 16:45:58 -07:00

jiffies.c

time: Fix overflow when HZ is smaller than 60