mm/migrate: correct failure handling if !hugepage_migration_support()

[firefly-linux-kernel-4.4.55.git] / include / asm-generic / barrier.h

diff --git a/include/asm-generic/barrier.h b/include/asm-generic/barrier.h
index d12a90f93689b54df868c529499e887c1b8f0684..6f692f8ac664565eda7f0e2f7a551d1f5ebc1df4 100644 (file)
--- a/include/asm-generic/barrier.h
+++ b/include/asm-generic/barrier.h
@@ -62,5 +62,20 @@
 #define set_mb(var, value)  do { (var) = (value); mb(); } while (0)
 #endif
 
+#define smp_store_release(p, v)                                                \
+do {                                                                   \
+       compiletime_assert_atomic_type(*p);                             \
+       smp_mb();                                                       \
+       ACCESS_ONCE(*p) = (v);                                          \
+} while (0)
+
+#define smp_load_acquire(p)                                            \
+({                                                                     \
+       typeof(*p) ___p1 = ACCESS_ONCE(*p);                             \
+       compiletime_assert_atomic_type(*p);                             \
+       smp_mb();                                                       \
+       ___p1;                                                          \
+})
+
 #endif /* !__ASSEMBLY__ */
 #endif /* __ASM_GENERIC_BARRIER_H */