[PATCH 3.10 319/319] metag: Only define atomic_dec_if_positive conditionally

Willy Tarreau
2017-02-05T20:08:39Z

From: Guenter Roeck <linux@roeck-us.net>

commit 35d04077ad96ed33ceea2501f5a4f1eacda77218 upstream.

The definition of atomic_dec_if_positive() assumes that
atomic_sub_if_positive() exists, which is only the case if
metag specific atomics are used. This results in the following
build error when trying to build metag1_defconfig.

kernel/ucount.c: In function 'dec_ucount':
kernel/ucount.c:211: error:
implicit declaration of function 'atomic_sub_if_positive'

Moving the definition of atomic_dec_if_positive() into the metag
conditional code fixes the problem.

Fixes: 6006c0d8ce94 ("metag: Atomics, locks and bitops")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
arch/metag/include/asm/atomic.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/metag/include/asm/atomic.h b/arch/metag/include/asm/atomic.h
index 307ecd2..d7d6b9e 100644
--- a/arch/metag/include/asm/atomic.h
+++ b/arch/metag/include/asm/atomic.h
@@ -38,6 +38,7 @@
#define atomic_dec(v) atomic_sub(1, (v))

#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)

#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
@@ -46,8 +47,6 @@

#endif

-#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
-
#include <asm-generic/atomic64.h>

#endif /* __ASM_METAG_ATOMIC_H */
--
2.8.0.rc2.1.gbe9624a