tile: define __smp_xxx

This defines __smp_xxx barriers for tile,
for use by virtualization.

Some smp_xxx barriers are removed as they are
defined correctly by asm-generic/barriers.h

Note: for 32 bit, keep smp_mb__after_atomic around since it's faster
than the generic implementation.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/tile/include/asm/barrier.h b/arch/tile/include/asm/barrier.h
index 96a42ae79f4d..d55222806c2f 100644
--- a/arch/tile/include/asm/barrier.h
+++ b/arch/tile/include/asm/barrier.h
@@ -79,11 +79,12 @@ mb_incoherent(void)
  * But after the word is updated, the routine issues an "mf" before returning,
  * and since it's a function call, we don't even need a compiler barrier.
  */
-#define smp_mb__before_atomic() smp_mb()
-#define smp_mb__after_atomic()  do { } while (0)
+#define __smp_mb__before_atomic()       __smp_mb()
+#define __smp_mb__after_atomic()        do { } while (0)
+#define smp_mb__after_atomic()  __smp_mb__after_atomic()
 #else /* 64 bit */
-#define smp_mb__before_atomic() smp_mb()
-#define smp_mb__after_atomic()  smp_mb()
+#define __smp_mb__before_atomic()       __smp_mb()
+#define __smp_mb__after_atomic()        __smp_mb()
 #endif
 
 #include <asm-generic/barrier.h>