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tracing: Change event->profile_count to be int type

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Like total_profile_count, struct ftrace_event_call::profile_count
is protected by event_mutex, so it doesn't need to be atomic_t.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4B1DC549.5010705@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Li Zefan 2009-12-08 11:17:29 +08:00 committed by Frederic Weisbecker
parent 8d18eaaff5
commit e00bf2ec60
5 changed files with 4 additions and 8 deletions
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2
include/linux/ftrace_event.h
View file

@ -131,7 +131,7 @@ struct ftrace_event_call {
void *mod;
void *data;
atomic_t profile_count;
int profile_count;
int (*profile_enable)(struct ftrace_event_call *);
void (*profile_disable)(struct ftrace_event_call *);
};

2
include/linux/syscalls.h
View file

@ -102,12 +102,10 @@ struct perf_event_attr;
#ifdef CONFIG_EVENT_PROFILE
#define TRACE_SYS_ENTER_PROFILE_INIT(sname) \
.profile_count = ATOMIC_INIT(-1), \
.profile_enable = prof_sysenter_enable, \
.profile_disable = prof_sysenter_disable,
#define TRACE_SYS_EXIT_PROFILE_INIT(sname) \
.profile_count = ATOMIC_INIT(-1), \
.profile_enable = prof_sysexit_enable, \
.profile_disable = prof_sysexit_disable,
#else

1
include/trace/ftrace.h
View file

@ -629,7 +629,6 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\
#ifdef CONFIG_EVENT_PROFILE
#define _TRACE_PROFILE_INIT(call) \
.profile_count = ATOMIC_INIT(-1), \
.profile_enable = ftrace_profile_enable_##call, \
.profile_disable = ftrace_profile_disable_##call,

6
kernel/trace/trace_event_profile.c
View file

@ -25,7 +25,7 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
char *buf;
int ret = -ENOMEM;
if (atomic_inc_return(&event->profile_count))
if (event->profile_count++ > 0)
return 0;
if (!total_profile_count) {
@ -56,7 +56,7 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
perf_trace_buf = NULL;
}
fail_buf:
atomic_dec(&event->profile_count);
event->profile_count--;
return ret;
}
@ -83,7 +83,7 @@ static void ftrace_profile_disable_event(struct ftrace_event_call *event)
{
char *buf, *nmi_buf;
if (!atomic_add_negative(-1, &event->profile_count))
if (--event->profile_count > 0)
return;
event->profile_disable(event);

1
kernel/trace/trace_kprobe.c
View file

@ -1426,7 +1426,6 @@ static int register_probe_event(struct trace_probe *tp)
call->unregfunc = probe_event_disable;
#ifdef CONFIG_EVENT_PROFILE
atomic_set(&call->profile_count, -1);
call->profile_enable = probe_profile_enable;
call->profile_disable = probe_profile_disable;
#endif