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Young Xiao 16cdab6398 sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD 
[ Upstream commit 56cd0aefa4 ]

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.

See commit 3581fe0ef3 ("ARM: 7556/1: perf: fix updated event period in
response to PERF_EVENT_IOC_PERIOD") for details.

Signed-off-by: Young Xiao <92siuyang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-06-25 11:35:57 +08:00
..
boot License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
configs sparc64: vcc: Enable VCC module in linux 2017-08-15 21:33:50 -07:00
crypto crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
include sparc64: Make corrupted user stacks more debuggable. 2018-11-04 14:50:54 +01:00
kernel sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD 2019-06-25 11:35:57 +08:00
lib atomics/treewide: Rename __atomic_add_unless() => atomic_fetch_add_unless() 2018-06-21 14:22:32 +02:00
math-emu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mm sparc64: Fix regression in non-hypervisor TLB flush xcall 2019-06-09 09:17:10 +02:00
net treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
oprofile
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
prom License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso sparc: vDSO: Silence an uninitialized variable warning 2018-10-17 21:55:02 -07:00
Kbuild vDSO for sparc 2017-11-15 14:21:03 +09:00
Kconfig sparc32: switch to NO_BOOTMEM 2018-08-21 12:40:26 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile Kbuild updates for v4.19 (2nd) 2018-08-25 13:40:38 -07:00