Commit 545d58f6 authored Jan 24, 2017 by Sudip Mukherjee Committed by Linus Torvalds Jan 24, 2017

frv: add atomic64_add_unless()

The build of frv allmodconfig was failing with the error:
lib/atomic64_test.c:209:9: error:

	implicit declaration of function 'atomic64_add_unless'

All the atomic64 operations were defined in frv, but
atomic64_add_unless() was not done.

Implement atomic64_add_unless() as done in other arches.

Link: http://lkml.kernel.org/r/1484781236-6698-1-git-send-email-sudipm.mukherjee@gmail.com


Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d51e9894

arch/frv/include/asm/atomic.h

+16 −0

Original line number	Original line	Diff line number	Diff line
	@@ -161,6 +161,22 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
	return c;		return c;
	}		}

			static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
			{
			long long c, old;

			c = atomic64_read(v);
			for (;;) {
			if (unlikely(c == u))
			break;
			old = atomic64_cmpxchg(v, c, c + i);
			if (likely(old == c))
			break;
			c = old;
			}
			return c != u;
			}

	#define ATOMIC_OP(op) \		#define ATOMIC_OP(op) \
	static inline int atomic_fetch_##op(int i, atomic_t *v) \		static inline int atomic_fetch_##op(int i, atomic_t *v) \
	{ \		{ \