From: Dmitry Vyukov <dvyukov@google.com>
To: mark.rutland@arm.com, peterz@infradead.org, mingo@redhat.com
Cc: akpm@linux-foundation.org, will.deacon@arm.com,
aryabinin@virtuozzo.com, kasan-dev@googlegroups.com,
linux-kernel@vger.kernel.org, x86@kernel.org,
Dmitry Vyukov <dvyukov@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: [PATCH 1/8] x86: remove unused atomic_inc_short()
Date: Tue, 28 Mar 2017 18:15:38 +0200 [thread overview]
Message-ID: <8aacc971a30c72b442e87d3f8fc2ac70f281e31d.1490717337.git.dvyukov@google.com> (raw)
In-Reply-To: <cover.1490717337.git.dvyukov@google.com>
In-Reply-To: <cover.1490717337.git.dvyukov@google.com>
It is completely unused and implemented only on x86.
Remove it.
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: x86@kernel.org
Cc: kasan-dev@googlegroups.com
---
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
--
2.12.2.564.g063fe858b8-goog
next prev parent reply other threads:[~2017-03-28 16:16 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 16:15 [PATCH 0/8] x86, kasan: add KASAN checks to atomic operations Dmitry Vyukov
2017-03-28 16:15 ` Dmitry Vyukov [this message]
2017-03-28 16:15 ` [PATCH 2/8] x86: un-macro-ify atomic ops implementation Dmitry Vyukov
2017-03-28 16:15 ` [PATCH 3/8] x86: use long long for 64-bit atomic ops Dmitry Vyukov
2017-03-28 21:32 ` Matthew Wilcox
2017-05-26 19:29 ` Dmitry Vyukov
2017-03-28 16:15 ` [PATCH 4/8] asm-generic: add atomic-instrumented.h Dmitry Vyukov
2017-03-28 21:35 ` Matthew Wilcox
2017-03-29 8:21 ` Dmitry Vyukov
2017-03-29 13:27 ` Mark Rutland
2017-03-29 17:15 ` Mark Rutland
2017-03-30 6:43 ` Ingo Molnar
2017-03-30 10:40 ` Mark Rutland
2017-03-28 16:15 ` [PATCH 5/8] x86: switch atomic.h to use atomic-instrumented.h Dmitry Vyukov
2017-03-28 16:25 ` Dmitry Vyukov
2017-03-29 13:37 ` Mark Rutland
2017-05-26 19:28 ` Dmitry Vyukov
2017-03-28 16:15 ` [PATCH 6/8] kasan: allow kasan_check_read/write() to accept pointers to volatiles Dmitry Vyukov
2017-03-28 16:15 ` [PATCH 7/8] asm-generic: add KASAN instrumentation to atomic operations Dmitry Vyukov
2017-03-29 14:00 ` Mark Rutland
2017-03-29 15:52 ` Dmitry Vyukov
2017-03-29 15:56 ` Mark Rutland
2017-03-28 16:15 ` [PATCH 8/8] asm-generic, x86: add comments for atomic instrumentation Dmitry Vyukov
2017-03-28 16:26 ` [PATCH 0/8] x86, kasan: add KASAN checks to atomic operations Dmitry Vyukov
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