MIPS: Use generic atomic64 for 32-bit kernels
The 64-bit 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>
To: linux-mips@linux-mips.org
Cc: a.p.zijlstra@chello.nl
Cc: paulus@samba.org
Cc: mingo@elte.hu
Cc: acme@redhat.com
Cc: jamie.iles@picochip.com
Patchwork: https://patchwork.linux-mips.org/patch/1361/
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 3ad59dd..ec41000 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -13,6 +13,7 @@
select HAVE_KPROBES
select HAVE_KRETPROBES
select RTC_LIB if !MACH_LOONGSON
+ select GENERIC_ATOMIC64 if !64BIT
mainmenu "Linux/MIPS Kernel Configuration"
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
index c63c56b..47d87da 100644
--- a/arch/mips/include/asm/atomic.h
+++ b/arch/mips/include/asm/atomic.h
@@ -782,6 +782,10 @@
*/
#define atomic64_add_negative(i, v) (atomic64_add_return(i, (v)) < 0)
+#else /* !CONFIG_64BIT */
+
+#include <asm-generic/atomic64.h>
+
#endif /* CONFIG_64BIT */
/*