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Diffstat (limited to 'arch/arm64/include/asm/arch_timer.h')
-rw-r--r--arch/arm64/include/asm/arch_timer.h21
1 files changed, 0 insertions, 21 deletions
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 9f0ec21d6327..88d20f04c64a 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -165,25 +165,6 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl)
isb();
}
-/*
- * Ensure that reads of the counter are treated the same as memory reads
- * for the purposes of ordering by subsequent memory barriers.
- *
- * This insanity brought to you by speculative system register reads,
- * out-of-order memory accesses, sequence locks and Thomas Gleixner.
- *
- * http://lists.infradead.org/pipermail/linux-arm-kernel/2019-February/631195.html
- */
-#define arch_counter_enforce_ordering(val) do { \
- u64 tmp, _val = (val); \
- \
- asm volatile( \
- " eor %0, %1, %1\n" \
- " add %0, sp, %0\n" \
- " ldr xzr, [%0]" \
- : "=r" (tmp) : "r" (_val)); \
-} while (0)
-
static __always_inline u64 __arch_counter_get_cntpct_stable(void)
{
u64 cnt;
@@ -224,8 +205,6 @@ static __always_inline u64 __arch_counter_get_cntvct(void)
return cnt;
}
-#undef arch_counter_enforce_ordering
-
static inline int arch_timer_arch_init(void)
{
return 0;