From 761cba95ae66984cf60423190aefb3b794774033 Mon Sep 17 00:00:00 2001 From: Peter Crosthwaite Date: Thu, 12 Jun 2014 17:05:43 -0700 Subject: [PATCH 6/7] arm64: spinlock: sev when unlocking locks Because spinners are doing a wfe in their poll of the lock. Signed-off-by: Peter Crosthwaite Signed-off-by: Michal Simek --- arch/arm64/include/asm/spinlock.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h index cee1287..c4df86f 100644 --- a/arch/arm64/include/asm/spinlock.h +++ b/arch/arm64/include/asm/spinlock.h @@ -87,6 +87,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock) { asm volatile( " stlrh %w1, %0\n" +" sev\n" : "=Q" (lock->owner) : "r" (lock->owner + 1) : "memory"); -- 2.1.1