This is a note to let you know that I've just added the patch titled
locking/x86: Remove the unused atomic_inc_short() methd
to the 4.9-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:
locking-x86-remove-the-unused-atomic_inc_short-methd.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 31b35f6b4d5285a311e10753f4eb17304326b211 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Date: Fri, 26 May 2017 19:29:00 +0200
Subject: locking/x86: Remove the unused atomic_inc_short() methd
From: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
commit 31b35f6b4d5285a311e10753f4eb17304326b211 upstream.
It is completely unused and implemented only on x86.
Remove it.
Suggested-by: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170526172900.91058-1-dvyukov@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/tile/lib/atomic_asm_32.S | 3 +--
arch/x86/include/asm/atomic.h | 13 -------------
2 files changed, 1 insertion(+), 15 deletions(-)
--- a/arch/tile/lib/atomic_asm_32.S
+++ b/arch/tile/lib/atomic_asm_32.S
@@ -24,8 +24,7 @@
* has an opportunity to return -EFAULT to the user if needed.
* The 64-bit routines just return a "long long" with the value,
* since they are only used from kernel space and don't expect to fault.
- * Support for 16-bit ops is included in the framework but we don't provide
- * any (x86_64 has an atomic_inc_short(), so we might want to some day).
+ * Support for 16-bit ops is included in the framework but we don't provide any.
*
* Note that the caller is advised to issue a suitable L1 or L2
* prefetch on the address being manipulated to avoid extra stalls.
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -249,19 +249,6 @@ static __always_inline int __atomic_add_
return c;
}
-/**
- * atomic_inc_short - increment of a short integer
- * @v: pointer to type int
- *
- * Atomically adds 1 to @v
- * Returns the new value of @u
- */
-static __always_inline short int atomic_inc_short(short int *v)
-{
- asm(LOCK_PREFIX "addw $1, %0" : "+m" (*v));
- return *v;
-}
-
#ifdef CONFIG_X86_32
# include <asm/atomic64_32.h>
#else
Patches currently in stable-queue which might be from dvyukov@xxxxxxxxxx are
queue-4.9/locking-x86-remove-the-unused-atomic_inc_short-methd.patch
queue-4.9/taskstats-fix-data-race.patch
