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arm64: arch_timer: Make workaround methods optional

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Not all errata need to workaround all access types. Allow them to
be optional.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2017-01-27 10:34:13 +00:00
parent 01d3e3ff26
commit 8c64621bf9
1 changed files with 3 additions and 2 deletions
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5
arch/arm64/include/asm/arch_timer.h
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@ -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; \