[PATCH 02/10] trace_syscalls: fix SYSCALL_DEFINE0

[PATCH 02/10] trace_syscalls: fix SYSCALL_DEFINE0

[Lai Jiangshan]

struct syscall_metadata variable name in SYSCALL_DEFINE0
is not the same as SYSCALL_DEFINE1/2/3/4/5/6.

SYSCALL_TRACE_ENTER_EVENT() and SYSCALL_TRACE_EXIT_EVENT() expect
struct syscall_metadata's name is __syscall_meta__XXXXXX
as SYSCALL_DEFINE1/2/3/4/5/6 defines.

It causes event_enter_##sname->data points to a wrong place.
(event_enter_##sname->data points to a dummy struct syscall_metadata)

It causes syscalls which are defined by SYSCALL_DEFINE0() can not be traced.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
---
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 55e7108..bee1d41 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -196,7 +196,7 @@ struct perf_event_attr;
 	static const struct syscall_metadata __used		\
 	  __attribute__((__aligned__(4)))			\
 	  __attribute__((section("__syscalls_metadata")))	\
-	  __syscall_meta_##sname = {				\
+	  __syscall_meta__##sname = {				\
 		.name 		= "sys_"#sname,			\
 		.nb_args 	= 0,				\
 		.enter_event	= &event_enter__##sname,	\

[tip:tracing/urgent] tracing/syscalls: Fix typo in SYSCALL_DEFINE0

[tip-bot for Lai Jiangshan]

Commit-ID:  e96dc9674cb597de4fee757ed005c8465072d13f
Gitweb:     http://git.kernel.org/tip/e96dc9674cb597de4fee757ed005c8465072d13f
Author:     Lai Jiangshan <laijs@cn.fujitsu.com>
AuthorDate: Tue, 15 Dec 2009 15:39:26 +0800
Committer:  Steven Rostedt <rostedt@goodmis.org>
CommitDate: Wed, 30 Dec 2009 10:27:04 -0500

tracing/syscalls: Fix typo in SYSCALL_DEFINE0

The struct syscall_metadata variable name in SYSCALL_DEFINE0
should be __syscall_meta__##sname instead of __syscall_meta_##sname
to match the name that is in SYSCALL_DEFINE1/2/3/4/5/6.

This error causes event_enter_##sname->data to point to the wrong
location, which causes syscalls which are defined by SYSCALL_DEFINE0()
not to be traced.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D2E.1010807@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 include/linux/syscalls.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 65793e9..207466a 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -195,7 +195,7 @@ struct perf_event_attr;
 	static const struct syscall_metadata __used		\
 	  __attribute__((__aligned__(4)))			\
 	  __attribute__((section("__syscalls_metadata")))	\
-	  __syscall_meta_##sname = {				\
+	  __syscall_meta__##sname = {				\
 		.name 		= "sys_"#sname,			\
 		.nb_args 	= 0,				\
 		.enter_event	= &event_enter__##sname,	\