[PATCH 02/10] trace_syscalls: fix SYSCALL_DEFINE0

[Lai Jiangshan <laijs@cn.fujitsu.com>]

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,	\