diff options
| author | Eric Anholt <eric@anholt.net> | 2016-04-13 23:28:43 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-05-11 12:13:00 +0300 |
| commit | a1dcbd11d09be1cb357b2f217c0eaa1461128da0 (patch) | |
| tree | 8246d163344fbe26dca0691602ceeff2d6503733 /drivers/irqchip | |
| parent | cb290d827eb0378447095093b4ea712482d31ae8 (diff) | |
| download | linux-a1dcbd11d09be1cb357b2f217c0eaa1461128da0.tar.xz | |
irqchip/bcm2836: Use a more generic memory barrier call
dsb() requires an argument on arm64, so we needed to add "sy".
Instead, take this opportunity to switch to the same smp_wmb() call
that gic uses for its IPIs. This is a less strong barrier than we
were doing before (dmb(ishst) compared to dsb(sy)), but it seems to be
the correct one.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-bcm2836.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c index f8141bd392c1..72ff1d5c5de6 100644 --- a/drivers/irqchip/irq-bcm2836.c +++ b/drivers/irqchip/irq-bcm2836.c @@ -195,7 +195,7 @@ static void bcm2836_arm_irqchip_send_ipi(const struct cpumask *mask, * Ensure that stores to normal memory are visible to the * other CPUs before issuing the IPI. */ - dsb(); + smp_wmb(); for_each_cpu(cpu, mask) { writel(1 << ipi, mailbox0_base + 16 * cpu); |