s390/barrier: Make array_index_mask_nospec() __always_inline

Mark array_index_mask_nospec() as __always_inline to guarantee the
mitigation is emitted inline regardless of compiler inlining decisions.

Fixes: e2dd833 ("s390: add optimized array_index_mask_nospec")
Cc: [email protected]
Reviewed-by: Ilya Leoshkevich <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>

Author: Vasily Gorbik

arch/s390/include/asm/barrier.h

@@ -62,8 +62,8 @@ do {									\
  * @size: number of elements in array
  */
 #define array_index_mask_nospec array_index_mask_nospec
-static inline unsigned long array_index_mask_nospec(unsigned long index,
-						    unsigned long size)
+static __always_inline unsigned long array_index_mask_nospec(unsigned long index,
+							     unsigned long size)
 {
 	unsigned long mask;