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[kvm-unit-tests,v4,05/10] arm64: timer: Make irq_received volatile

Message ID 20200131163728.5228-6-alexandru.elisei@arm.com (mailing list archive)
State New, archived
Headers show
Series arm/arm64: Various fixes | expand

Commit Message

Alexandru Elisei Jan. 31, 2020, 4:37 p.m. UTC 
The irq_received field is modified by the interrupt handler. Make it
volatile so that the compiler doesn't reorder accesses with regard to
the instruction that will be causing the interrupt.

Suggested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
---
 arm/timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arm/timer.c b/arm/timer.c
index e758e84855c3..82f891147b35 100644
--- a/arm/timer.c
+++ b/arm/timer.c
@@ -109,7 +109,7 @@  static void write_ptimer_ctl(u64 val)
 struct timer_info {
 	u32 irq;
 	u32 irq_flags;
-	bool irq_received;
+	volatile bool irq_received;
 	u64 (*read_counter)(void);
 	u64 (*read_cval)(void);
 	void (*write_cval)(u64);