1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index be5fd38bd5a0..cbc5833fb221 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -32,6 +32,26 @@ extern unsigned long __sw_hweight64(__u64 w);
  */
 #include <asm/bitops.h>
 
+/*
+ * Provide __deprecated wrappers for the new interface, avoid flag day changes.
+ * We need the ugly external functions to break header recursion hell.
+ */
+#ifndef smp_mb__before_clear_bit
+static inline void __deprecated smp_mb__before_clear_bit(void)
+{
+        extern void __smp_mb__before_atomic(void);
+        __smp_mb__before_atomic();
+}
+#endif
+
+#ifndef smp_mb__after_clear_bit
+static inline void __deprecated smp_mb__after_clear_bit(void)
+{
+        extern void __smp_mb__after_atomic(void);
+        __smp_mb__after_atomic();
+}
+#endif
+
 #define for_each_set_bit(bit, addr, size) \
         for ((bit) = find_first_bit((addr), (size));            \
              (bit) < (size);                                    \