[PATCH v2 2/4] MIPS: in non-64bit kernel, using the generic atomic64 operations for perf counter support

[Deng-Cheng Zhu <dengcheng.zhu@gmail.com>]

64bit kernel has already had its atomic64 functions. Except for that, we
use the generic spinlocked version. The atomic64 types and related
functions are needed for the Linux performance counter subsystem.

Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
---
 arch/mips/Kconfig              |    1 +
 arch/mips/include/asm/atomic.h |    4 ++++
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 29e8692..469176c 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -4,6 +4,7 @@ config MIPS
 	select HAVE_GENERIC_DMA_COHERENT
 	select HAVE_IDE
 	select HAVE_OPROFILE
+	select GENERIC_ATOMIC64 if !64BIT
 	select HAVE_ARCH_KGDB
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_TRACE_MCOUNT_TEST
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
index 519197e..887a881 100644
--- a/arch/mips/include/asm/atomic.h
+++ b/arch/mips/include/asm/atomic.h
@@ -782,6 +782,10 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
  */
 #define atomic64_add_negative(i, v) (atomic64_add_return(i, (v)) < 0)
 
+#else /* CONFIG_64BIT */
+
+#include <asm-generic/atomic64.h>
+
 #endif /* CONFIG_64BIT */
 
 /*
-- 
1.7.0.4