linux-kernel - [PATCH 11/14] x86/ticketlock: don't inline _spin

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Message-Id: <29b74fea105eb37bd80d5fd1ccfa8514c8b09ee7.1289940821.git.jeremy.fitzhardinge@citrix.com>
Date:	Tue, 16 Nov 2010 13:08:42 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nick Piggin <npiggin@...nel.dk>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Eric Dumazet <dada1@...mosbay.com>,
	Jan Beulich <JBeulich@...ell.com>, Avi Kivity <avi@...hat.com>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Virtualization <virtualization@...ts.linux-foundation.org>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 11/14] x86/ticketlock: don't inline _spin_unlock when using paravirt spinlocks

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

The code size expands somewhat, and its probably better to just call
a function rather than inline it.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/Kconfig     |    3 +++
 kernel/Kconfig.locks |    2 +-
 2 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e832768..a615c9c 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -531,6 +531,9 @@ config PARAVIRT_SPINLOCKS
 
 	  If you are unsure how to answer this question, answer N.
 
+config ARCH_NOINLINE_SPIN_UNLOCK
+       def_bool PARAVIRT_SPINLOCKS
+
 config PARAVIRT_CLOCK
 	bool
 
diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks
index 88c92fb..3216c22 100644
--- a/kernel/Kconfig.locks
+++ b/kernel/Kconfig.locks
@@ -125,7 +125,7 @@ config INLINE_SPIN_LOCK_IRQSAVE
 		 ARCH_INLINE_SPIN_LOCK_IRQSAVE
 
 config INLINE_SPIN_UNLOCK
-	def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_SPIN_UNLOCK)
+	def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_SPIN_UNLOCK) && !ARCH_NOINLINE_SPIN_UNLOCK
 
 config INLINE_SPIN_UNLOCK_BH
 	def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_UNLOCK_BH
-- 
1.7.2.3

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