This is a note to let you know that I've just added the patch titled
metag: Only define atomic_dec_if_positive conditionally
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
metag-only-define-atomic_dec_if_positive-conditionally.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 35d04077ad96ed33ceea2501f5a4f1eacda77218 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Date: Fri, 7 Oct 2016 10:40:59 -0700
Subject: metag: Only define atomic_dec_if_positive conditionally
From: Guenter Roeck <linux@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/metag/include/asm/atomic.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/metag/include/asm/atomic.h
+++ b/arch/metag/include/asm/atomic.h
@@ -39,11 +39,10 @@
#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)
#endif
-#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
-
#include <asm-generic/atomic64.h>
#endif /* __ASM_METAG_ATOMIC_H */
Patches currently in stable-queue which might be from linux@xxxxxxxxxxxx are
queue-4.4/pstore-core-drop-cmpxchg-based-updates.patch
queue-4.4/metag-only-define-atomic_dec_if_positive-conditionally.patch
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