linux-kernel - [PATCH 2/2] powerpc: Use generic atomic64_t implementation on 32-bit processors

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Message-ID: <18995.20721.75525.524733@cargo.ozlabs.ibm.com>
Date:	Sat, 13 Jun 2009 17:10:41 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	benh@...nel.crashing.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] powerpc: Use generic atomic64_t implementation on 32-bit processors

>From 02fccb02e29bc24e84a5b2ea6ea5d63779247408 Mon Sep 17 00:00:00 2001
From: Paul Mackerras <paulus@...ba.org>
Date: Sat, 13 Jun 2009 16:24:03 +1000
Subject: 

This makes 32-bit powerpc use the generic atomic64_t implementation.

Signed-off-by: Paul Mackerras <paulus@...ba.org>
---
 arch/powerpc/Kconfig              |    1 +
 arch/powerpc/include/asm/atomic.h |    3 +++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index cdc9a6f..3f0a983 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -125,6 +125,7 @@ config PPC
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select HAVE_OPROFILE
 	select HAVE_SYSCALL_WRAPPERS if PPC64
+	select GENERIC_ATOMIC64 if PPC32
 
 config EARLY_PRINTK
 	bool
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h
index b7d2d07..4012483 100644
--- a/arch/powerpc/include/asm/atomic.h
+++ b/arch/powerpc/include/asm/atomic.h
@@ -470,6 +470,9 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
 
 #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
 
+#else  /* __powerpc64__ */
+#include <asm-generic/atomic64.h>
+
 #endif /* __powerpc64__ */
 
 #include <asm-generic/atomic-long.h>
-- 
1.6.0.4

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