It is completely unused and implemented only on x86.
Remove it.
Signed-off-by: Dmitry Vyukov <dvyu...@google.com>
Suggested-by: Mark Rutland <mark.rutl...@arm.com>
Cc: Andrey Ryabinin <aryabi...@virtuozzo.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: x...@kernel.org
--
Changes since v1:
- change Suggested-by to Mark
Changes since v2:
- rebase on tip/locking/core
- drop atomic-instrumented.h changes
---
arch/tile/lib/atomic_asm_32.S | 3 +--
arch/x86/include/asm/atomic.h | 13 -------------
2 files changed, 1 insertion(+), 15 deletions(-)
diff --git a/arch/tile/lib/atomic_asm_32.S b/arch/tile/lib/atomic_asm_32.S
index 1a70e6c0f259..94709ab41ed8 100644
--- 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.
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index caa5798c92f4..33380b871463 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -246,19 +246,6 @@ static __always_inline int __atomic_add_unless(atomic_t
*v, int a, int u)
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
--
2.13.0.219.gdb65acc882-goog
