From: Marc Zyngier <marc.zyng...@arm.com>
Not all errata need to workaround all access types. Allow them to
be optional.
Acked-by: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyng...@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/arch_timer.h
b/arch/arm64/include/asm/arch_timer.h
index cc1e081..01917b4 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -60,8 +60,9 @@ extern const struct arch_timer_erratum_workaround
*timer_unstable_counter_workar
#define arch_timer_reg_read_stable(reg) \
({ \
u64 _val; \
- if (needs_unstable_timer_counter_workaround()) \
- _val = timer_unstable_counter_workaround->read_##reg();\
+ if (needs_unstable_timer_counter_workaround() && \
+ timer_unstable_counter_workaround->read_##reg) \
+ _val = timer_unstable_counter_workaround->read_##reg(); \
else \
_val = read_sysreg(reg); \
_val; \
--
2.7.4
