Commits
Will Deacon committed 3581fe0ef37
ARM: 7556/1: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD The PERF_EVENT_IOC_PERIOD ioctl command can be used to change the sample period of a running perf_event. Consequently, when calculating the next event period, the new period will only be considered after the previous one has overflowed. This patch changes the calculation of the remaining event ticks so that they are offset if the period has changed. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Reported-by: Andreas Sandberg <andreas.sandberg@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>