arch: Introduce smp_load_acquire(), smp_store_release()

[~andy/linux] / arch / sparc / include / asm / barrier_64.h

diff --git a/arch/sparc/include/asm/barrier_64.h b/arch/sparc/include/asm/barrier_64.h
index 95d45986f908d4224d6b5bf6ec4d5e2a4d697ceb..b5aad964558e756bbf6c3f3c3e29616dceabde94 100644 (file)
--- a/arch/sparc/include/asm/barrier_64.h
+++ b/arch/sparc/include/asm/barrier_64.h
@@ -53,4 +53,19 @@ do { __asm__ __volatile__("ba,pt     %%xcc, 1f\n\t" \
 
 #define smp_read_barrier_depends()     do { } while(0)
 
+#define smp_store_release(p, v)                                                \
+do {                                                                   \
+       compiletime_assert_atomic_type(*p);                             \
+       barrier();                                                      \
+       ACCESS_ONCE(*p) = (v);                                          \
+} while (0)
+
+#define smp_load_acquire(p)                                            \
+({                                                                     \
+       typeof(*p) ___p1 = ACCESS_ONCE(*p);                             \
+       compiletime_assert_atomic_type(*p);                             \
+       barrier();                                                      \
+       ___p1;                                                          \
+})
+
 #endif /* !(__SPARC64_BARRIER_H) */