Commit-ID: a1dcbd11d09be1cb357b2f217c0eaa1461128da0
Gitweb: http://git.kernel.org/tip/a1dcbd11d09be1cb357b2f217c0eaa1461128da0
Author: Eric Anholt <eric@xxxxxxxxxx>
AuthorDate: Wed, 13 Apr 2016 13:28:43 -0700
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Wed, 11 May 2016 10:13:00 +0100
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@xxxxxxxxxx>
Acked-by: Stephen Warren <swarren@xxxxxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-bcm2836.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c
index f8141bd..72ff1d5 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);
--
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