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authorColin King <colin.king@canonical.com>2017-01-11 11:43:10 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-07-05 12:40:24 (GMT)
commitc78b8de5c05c73ff451b7c5a085766b421920ccd (patch)
treebb28f055c04e2effe32a66f4a13fdcad74a10032 /drivers
parent6130fac994818eb0fbc9dfc95056292e71fb3791 (diff)
downloadlinux-c78b8de5c05c73ff451b7c5a085766b421920ccd.tar.xz
perf/x86/intel: Use ULL constant to prevent undefined shift behaviour
[ Upstream commit ad5013d5699d30ded0cdbbc68b93b2aa28222c6e ] When x86_pmu.num_counters is 32 the shift of the integer constant 1 is exceeding 32bit and therefor undefined behaviour. Fix this by shifting 1ULL instead of 1. Reported-by: CoverityScan CID#1192105 ("Bad bit shift operation") Signed-off-by: Colin Ian King <colin.king@canonical.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Kan Liang <kan.liang@intel.com> Cc: Stephane Eranian <eranian@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Link: http://lkml.kernel.org/r/20170111114310.17928-1-colin.king@canonical.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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