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From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
To: linux-arm-kernel@lists.infradead.org
Cc: Arnd Bergmann <arnd@arndb.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Russell King <linux@armlinux.org.uk>,
	Sebastian Andrzej Siewior <sebastian@breakpoint.cc>,
	Ingo Molnar <mingo@redhat.com>, Waiman Long <longman@redhat.com>,
	Will Deacon <will@kernel.org>
Subject: [PATCH 6/6] ARM: Inline locking functions for !PREEMPTION
Date: Mon, 14 Oct 2019 00:13:10 +0200	[thread overview]
Message-ID: <20191013221310.30748-7-sebastian@breakpoint.cc> (raw)
In-Reply-To: <20191013221310.30748-1-sebastian@breakpoint.cc>

On non-preemptive kernels, the locking instruction is less than 64 bytes
and it makes sense to inline it. With PREEMPTION the kernel becomes very
big if the locks are inlined.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
 arch/arm/Kconfig | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4c780e7387208..21edc8e649261 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -26,6 +26,32 @@ config ARM
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_HAVE_CUSTOM_GPIO_H
 	select ARCH_HAS_GCOV_PROFILE_ALL
+	select ARCH_INLINE_READ_LOCK if !PREEMPTION
+	select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
+	select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION
+	select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION
+	select ARCH_INLINE_READ_UNLOCK if !PREEMPTION
+	select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION
+	select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION
+	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION
+	select ARCH_INLINE_WRITE_LOCK if !PREEMPTION
+	select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION
+	select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION
+	select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION
+	select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION
+	select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION
+	select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION
+	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION
+	select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION
+	select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION
+	select ARCH_INLINE_SPIN_LOCK if !PREEMPTION
+	select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION
+	select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION
+	select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION
+	select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION
+	select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION
+	select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION
+	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
 	select ARCH_KEEP_MEMBLOCK if HAVE_ARCH_PFN_VALID || KEXEC
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_NO_SG_CHAIN if !ARM_HAS_SG_CHAIN
-- 
2.23.0


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  parent reply	other threads:[~2019-10-13 22:15 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-13 22:13 [RFC PATCH 0/6 v2] Queued spinlocks/RW-locks for ARM Sebastian Andrzej Siewior
2019-10-13 22:13 ` [PATCH 1/6] sh: Move cmpxchg-xchg.h to asm-generic Sebastian Andrzej Siewior
2019-10-14  7:25   ` Arnd Bergmann
2019-10-15 22:31     ` [PATCH 1/6 v2] " Sebastian Andrzej Siewior
2019-10-13 22:13 ` [PATCH 2/6] ARM: cmpxchg: Define first cmpxchg() followed by xchg() Sebastian Andrzej Siewior
2019-10-13 22:13 ` [PATCH 3/6] ARM: Add xchg_{8|16}() on generic cmpxchg() on CPU_V6 Sebastian Andrzej Siewior
2019-10-13 22:13 ` [PATCH 4/6] ARM: Use qrwlock implementation Sebastian Andrzej Siewior
2019-10-13 22:13 ` [PATCH 5/6] ARM: Use qspinlock implementation Sebastian Andrzej Siewior
2019-10-13 22:13 ` Sebastian Andrzej Siewior [this message]
2019-10-14  7:43   ` [PATCH 6/6] ARM: Inline locking functions for !PREEMPTION Arnd Bergmann
2019-10-14 10:01     ` Arnd Bergmann
2019-10-15 22:30       ` Sebastian Andrzej Siewior
2019-10-15 22:37         ` Waiman Long
2019-10-15 22:47           ` Arnd Bergmann
2019-10-15 22:04     ` Sebastian Andrzej Siewior
2019-10-14  9:00 ` [RFC PATCH 0/6 v2] Queued spinlocks/RW-locks for ARM Arnd Bergmann
2019-10-16 15:57 ` Will Deacon
2019-10-16 17:45   ` Waiman Long
2019-10-16 18:33     ` Arnd Bergmann
2019-10-16 21:35     ` Sebastian Andrzej Siewior
2019-10-16 22:09   ` Sebastian Andrzej Siewior
2019-10-17 15:36     ` Waiman Long

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