[PATCH 01/28] atomic: Prepare generic atomic implementation for logic ops

Peter Zijlstra
2015-07-16T17:21:11Z

[-- Attachment #1: peterz-atomic-generic-prepare.patch --]
[-- Type: text/plain, Size: 815 bytes --]

Clean up the #ifdef guards a bit to prepare for architectures to
supply their own logic ops.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
include/asm-generic/atomic.h | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

--- a/include/asm-generic/atomic.h
+++ b/include/asm-generic/atomic.h
@@ -98,14 +98,22 @@ ATOMIC_OP_RETURN(add, +)
ATOMIC_OP_RETURN(sub, -)
#endif

-#ifndef atomic_clear_mask
+#ifndef atomic_and
ATOMIC_OP(and, &)
+#endif
+
+#ifndef atomic_clear_mask
#define atomic_clear_mask(i, v) atomic_and(~(i), (v))
#endif

-#ifndef atomic_set_mask
+#ifndef atomic_or
+#ifndef CONFIG_ARCH_HAS_ATOMIC_OR
#define CONFIG_ARCH_HAS_ATOMIC_OR
+#endif
ATOMIC_OP(or, |)
+#endif
+
+#ifndef atomic_set_mask
#define atomic_set_mask(i, v) atomic_or((i), (v))
#endif