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| author | Sudeep Holla <sudeep.holla@arm.com> | 2018-07-09 16:45:36 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-07-10 22:12:47 +0200 |
| commit | 5e18e412973d6bb1804de1d4d30a891c774b006e (patch) | |
| tree | 994d9dd644303b98bcafdc2e35826016c3f1b7bb /drivers/clocksource | |
| parent | 5b5ccbc2b041f98f26b984e013d303b7f9e6fb8e (diff) | |
| download | linux-5e18e412973d6bb1804de1d4d30a891c774b006e.tar.gz linux-5e18e412973d6bb1804de1d4d30a891c774b006e.tar.bz2 linux-5e18e412973d6bb1804de1d4d30a891c774b006e.zip | |
clocksource: arm_arch_timer: Set arch_mem_timer cpumask to cpu_possible_mask
Currently, arch_mem_timer cpumask is set to cpu_all_mask which should be
fine. However, cpu_possible_mask is more accurate and if there are other
clockevent source in the system which are set to cpu_possible_mask, then
having cpu_all_mask may result in issue.
E.g. on a platform with arm,sp804 timer with rating 300 and
cpu_possible_mask and this arch_mem_timer timer with rating 400 and
cpu_all_mask, tick_check_preferred may choose both preferred as the
cpumasks are not equal though they must be.
This issue was root caused incorrectly initially and a fix was merged as
commit 1332a9055801 ("tick: Prefer a lower rating device only if it's CPU
local device").
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Link: https://lkml.kernel.org/r/1531151136-18297-2-git-send-email-sudeep.holla@arm.com
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 57cb2f00fc07..d8c7f5750cdb 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -735,7 +735,7 @@ static void __arch_timer_setup(unsigned type, clk->features |= CLOCK_EVT_FEAT_DYNIRQ; clk->name = "arch_mem_timer"; clk->rating = 400; - clk->cpumask = cpu_all_mask; + clk->cpumask = cpu_possible_mask; if (arch_timer_mem_use_virtual) { clk->set_state_shutdown = arch_timer_shutdown_virt_mem; clk->set_state_oneshot_stopped = arch_timer_shutdown_virt_mem; |