[3/3] arm64: kconfig: Ensure spinlock fastpaths are inlined if !PREEMPT

Commit Message

Will Deacon June 26, 2018, 11 a.m. UTC

When running with CONFIG_PREEMPT=n, the spinlock fastpaths fit inside
64 bytes, which typically coincides with the L1 I-cache line size.

Inline the spinlock fastpaths, like we do already for rwlocks.

Signed-off-by: Will Deacon <[e-mail]>
---
 arch/arm64/Kconfig | 10 ++++++++++
 1 file changed, 10 insertions(+)

Patch

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index facd19625563..476de9b1d239 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -42,6 +42,16 @@  config ARM64
 	select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPT
 	select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPT
 	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPT
+	select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPT
+	select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPT
+	select ARCH_INLINE_SPIN_LOCK if !PREEMPT
+	select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPT
+	select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPT
+	select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPT
+	select ARCH_INLINE_SPIN_UNLOCK if !PREEMPT
+	select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPT
+	select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPT
+	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPT
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS