arm64: Inline the spin lock function family

Combined with LTO, this yields a consistent 5% boost to procfs I/O
performance right off the bat (as measured with callbench). The spin
lock functions constitute some of the hottest code paths in the kernel;
inlining them to improve performance makes sense.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Danny Lin <danny@kdrag0n.dev>

Author: kerneltoast

arch/arm64/Kconfig

@@ -176,6 +176,34 @@ config ARM64
 	select SWIOTLB
 	select SYSCTL_EXCEPTION_TRACE
 	select THREAD_INFO_IN_TASK
+	select ARCH_INLINE_SPIN_TRYLOCK
+	select ARCH_INLINE_SPIN_TRYLOCK_BH
+	select ARCH_INLINE_SPIN_LOCK
+	select ARCH_INLINE_SPIN_LOCK_BH
+	select ARCH_INLINE_SPIN_LOCK_IRQ
+	select ARCH_INLINE_SPIN_LOCK_IRQSAVE
+	select ARCH_INLINE_SPIN_UNLOCK
+	select ARCH_INLINE_SPIN_UNLOCK_BH
+	select ARCH_INLINE_SPIN_UNLOCK_IRQ
+	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
+	select ARCH_INLINE_READ_TRYLOCK
+	select ARCH_INLINE_READ_LOCK
+	select ARCH_INLINE_READ_LOCK_BH
+	select ARCH_INLINE_READ_LOCK_IRQ
+	select ARCH_INLINE_READ_LOCK_IRQSAVE
+	select ARCH_INLINE_READ_UNLOCK
+	select ARCH_INLINE_READ_UNLOCK_BH
+	select ARCH_INLINE_READ_UNLOCK_IRQ
+	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
+	select ARCH_INLINE_WRITE_TRYLOCK
+	select ARCH_INLINE_WRITE_LOCK
+	select ARCH_INLINE_WRITE_LOCK_BH
+	select ARCH_INLINE_WRITE_LOCK_IRQ
+	select ARCH_INLINE_WRITE_LOCK_IRQSAVE
+	select ARCH_INLINE_WRITE_UNLOCK
+	select ARCH_INLINE_WRITE_UNLOCK_BH
+	select ARCH_INLINE_WRITE_UNLOCK_IRQ
+	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
 	help
 	  ARM 64-bit (AArch64) Linux support.