MN10300: atomic_read() should ensure it emits a load



atomic_read() needs to ensure that it emits a load (which it can do by using
ACCESS_ONCE()).

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: David Howells <dhowells@redhat.com>

parent dcca52c2

arch/mn10300/include/asm/atomic.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -139,7 +139,7 @@ static inline unsigned long __cmpxchg(volatile unsigned long *m,
		* Atomically reads the value of @v. Note that the guaranteed
		* useful range of an atomic_t is only 24 bits.
		*/
		#define atomic_read(v) ((v)->counter)
		#define atomic_read(v) (ACCESS_ONCE((v)->counter))

		/**
		* atomic_set - set atomic variable