[PATCH 02/10] trace_syscalls: fix SYSCALL_DEFINE0

Lai Jiangshan
2009-12-15T07:40:21Z

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, \