linux-kernel - [tip:x86/spinlocks] x86, ticketlock: Don' t inline _spin

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Message-ID: <tip-8db732668a48e93d00d881517a08136e8fa71000@git.kernel.org>
Date:	Sat, 10 Aug 2013 09:13:28 -0700
From:	tip-bot for Raghavendra K T <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	konrad.wilk@...cle.com, torvalds@...ux-foundation.org,
	raghavendra.kt@...ux.vnet.ibm.com, tglx@...utronix.de,
	hpa@...ux.intel.com
Subject: [tip:x86/spinlocks] x86, ticketlock: Don'
 t inline _spin_unlock when using paravirt spinlocks

Commit-ID:  8db732668a48e93d00d881517a08136e8fa71000
Gitweb:     http://git.kernel.org/tip/8db732668a48e93d00d881517a08136e8fa71000
Author:     Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
AuthorDate: Fri, 9 Aug 2013 19:51:50 +0530
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Fri, 9 Aug 2013 07:53:10 -0700

x86, ticketlock: Don't inline _spin_unlock when using paravirt spinlocks

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

Thanks Jeremy for original version of ARCH_NOINLINE_SPIN_UNLOCK config patch,
which is simplified.

Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1376058122-8248-3-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Acked-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b32ebf9..112e712 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -632,6 +632,7 @@ config PARAVIRT_DEBUG
 config PARAVIRT_SPINLOCKS
 	bool "Paravirtualization layer for spinlocks"
 	depends on PARAVIRT && SMP
+	select UNINLINE_SPIN_UNLOCK
 	---help---
 	  Paravirtualized spinlocks allow a pvops backend to replace the
 	  spinlock implementation with something virtualization-friendly
--
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