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authorJohn Stultz <john.stultz@linaro.org>2012-08-21 20:30:48 -0400
committerThomas Gleixner <tglx@linutronix.de>2012-08-22 10:42:13 +0200
commit6ea565a9be32a3c8d1092017686f183b6d8c4514 (patch)
tree2db67e9659f91f11997998ba9845f4c7cb0d89ab /mm/sparse-vmemmap.c
parent85dc8f05c93c8105987de9d7e7cebf15a72ff4ec (diff)
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time: Avoid potential shift overflow with large shift values
Andreas Schwab noticed that the 1 << tk->shift could overflow if the shift value was greater than 30, since 1 would be a 32bit long on 32bit architectures. This issue was introduced by 1e75fa8be (time: Condense timekeeper.xtime into xtime_sec) Use 1ULL instead to ensure we don't overflow on the shift. Reported-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/r/1345595449-34965-4-git-send-email-john.stultz@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm/sparse-vmemmap.c')
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