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authorLai Jiangshan <laijs@cn.fujitsu.com>2009-12-01 16:23:47 +0800
committerIngo Molnar <mingo@elte.hu>2009-12-01 17:33:29 +0100
commitc252f65793874b56d50395ab604db465ce688665 (patch)
tree30bc32361d2b368679910270ec4e99e841fa099b /kernel/trace
parentfcc19438dda38dacc8c144e2db3ebc6b9fd4f8b8 (diff)
trace_syscalls: Add syscall_nr field to struct syscall_metadata
Add syscall_nr field to struct syscall_metadata, it helps us to get syscall number easier. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Acked-by: Jason Baron <jbaron@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B14D293.6090800@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_syscalls.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 27eb18d6922..144cc14d855 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -51,7 +51,7 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
return syscalls_metadata[nr];
}
-int syscall_name_to_nr(const char *name)
+static int syscall_name_to_nr(const char *name)
{
int i;
@@ -342,10 +342,8 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
@@ -365,10 +363,8 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
void unreg_event_syscall_enter(struct ftrace_event_call *call)
{
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return;
mutex_lock(&syscall_trace_lock);
@@ -383,10 +379,8 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
@@ -406,10 +400,8 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
void unreg_event_syscall_exit(struct ftrace_event_call *call)
{
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return;
mutex_lock(&syscall_trace_lock);
@@ -436,6 +428,10 @@ int __init init_ftrace_syscalls(void)
for (i = 0; i < NR_syscalls; i++) {
addr = arch_syscall_addr(i);
meta = find_syscall_meta(addr);
+ if (!meta)
+ continue;
+
+ meta->syscall_nr = i;
syscalls_metadata[i] = meta;
}