From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Christoph Hellwig <hch@lst.de>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Li Zefan <lizf@cn.fujitsu.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
Johannes Berg <johannes.berg@intel.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
Tom Zanussi <tzanussi@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Andi Kleen <andi@firstfloor.org>
Subject: [patch 09/20] x86 inline memcpy
Date: Fri, 09 Jul 2010 18:57:36 -0400 [thread overview]
Message-ID: <20100709225816.884268032@efficios.com> (raw)
In-Reply-To: 20100709225727.312232266@efficios.com
[-- Attachment #1: x86-inline-memcpy.patch --]
[-- Type: text/plain, Size: 1672 bytes --]
Export an inline_memcpy() API. Useful when the memcpy size is unknown but the
caller cannot afford the cost of a function call. Useful for very frequent
memcpy callers.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
arch/x86/include/asm/string_32.h | 7 +++++++
arch/x86/include/asm/string_64.h | 7 +++++++
2 files changed, 14 insertions(+)
Index: linux.trees.git/arch/x86/include/asm/string_32.h
===================================================================
--- linux.trees.git.orig/arch/x86/include/asm/string_32.h 2010-06-21 17:50:21.000000000 -0400
+++ linux.trees.git/arch/x86/include/asm/string_32.h 2010-06-21 17:56:49.000000000 -0400
@@ -44,6 +44,13 @@ static __always_inline void *__memcpy(vo
return to;
}
+#define __HAVE_ARCH_INLINE_MEMCPY
+static __always_inline void *inline_memcpy(void *to, const void *from,
+ size_t n)
+{
+ return __memcpy(to, from, n);
+}
+
/*
* This looks ugly, but the compiler can optimize it totally,
* as the count is constant.
Index: linux.trees.git/arch/x86/include/asm/string_64.h
===================================================================
--- linux.trees.git.orig/arch/x86/include/asm/string_64.h 2010-06-21 17:50:21.000000000 -0400
+++ linux.trees.git/arch/x86/include/asm/string_64.h 2010-06-21 17:57:13.000000000 -0400
@@ -23,6 +23,13 @@ static __always_inline void *__inline_me
return to;
}
+#define __HAVE_ARCH_INLINE_MEMCPY
+static __always_inline void *inline_memcpy(void *to, const void *from,
+ size_t n)
+{
+ return __inline_memcpy(to, from, n);
+}
+
/* Even with __builtin_ the compiler may decide to use the out of line
function. */
next prev parent reply other threads:[~2010-07-09 23:40 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-09 22:57 [patch 00/20] Generic Ring Buffer Library Mathieu Desnoyers
2010-07-09 22:57 ` [patch 01/20] Create generic alignment API (v8) Mathieu Desnoyers
2010-08-06 11:41 ` Alexander Shishkin
2010-08-06 14:48 ` Mathieu Desnoyers
2010-07-09 22:57 ` [patch 02/20] notifier atomic call chain notrace Mathieu Desnoyers
2010-07-09 22:57 ` [patch 03/20] idle notifier standardization Mathieu Desnoyers
2010-07-09 22:57 ` [patch 04/20] idle notifier standardization x86_32 Mathieu Desnoyers
2010-07-09 22:57 ` [patch 05/20] Poll : add poll_wait_set_exclusive Mathieu Desnoyers
2010-07-09 22:57 ` [patch 06/20] prio_heap: heap_remove(), heap_maximum(), heap_replace() and heap_cherrypick() Mathieu Desnoyers
2010-07-09 22:57 ` [patch 07/20] kthread_kill_stop() Mathieu Desnoyers
2010-07-09 22:57 ` [patch 08/20] inline memcpy Mathieu Desnoyers
2010-07-09 22:57 ` Mathieu Desnoyers [this message]
2010-07-09 22:57 ` [patch 10/20] Trace clock - build standalone Mathieu Desnoyers
2010-07-09 22:57 ` [patch 11/20] Ftrace ring buffer renaming Mathieu Desnoyers
2010-07-09 22:57 ` [patch 12/20] ring buffer backend Mathieu Desnoyers
2010-07-09 22:57 ` [patch 13/20] ring buffer frontend Mathieu Desnoyers
2010-07-09 22:57 ` [patch 14/20] Ring buffer library - documentation Mathieu Desnoyers
2010-07-09 22:57 ` [patch 15/20] Ring buffer library - VFS operations Mathieu Desnoyers
2010-07-09 22:57 ` [patch 16/20] Ring buffer library - client sample Mathieu Desnoyers
2010-07-09 22:57 ` [patch 17/20] Ring buffer benchmark library Mathieu Desnoyers
2010-07-09 22:57 ` [patch 18/20] Ring Buffer Record Iterator Mathieu Desnoyers
2010-07-09 22:57 ` [patch 19/20] Ring Buffer: Basic API Mathieu Desnoyers
2010-07-09 22:57 ` [patch 20/20] Ring buffer: benchmark simple API Mathieu Desnoyers
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