Messages in this thread Patch in this message | | | Date | Mon, 07 Dec 2009 15:43:45 +0800 | From | Li Zefan <> | Subject | [PATCH 11/13] 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> --- include/linux/ftrace_event.h | 2 +- include/linux/syscalls.h | 2 -- include/trace/ftrace.h | 1 - kernel/trace/trace_event_profile.c | 6 +++--- kernel/trace/trace_kprobe.c | 1 - 5 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 02de70f..22a04d9 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -130,7 +130,7 @@ 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 *); }; diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e79e2f3..d3ecfb9 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -101,12 +101,10 @@ 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 diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 4aac981..51f045b 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -640,7 +640,6 @@ 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, diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c index d9c60f8..9e25573 100644 --- a/kernel/trace/trace_event_profile.c +++ b/kernel/trace/trace_event_profile.c @@ -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 @@ fail_buf_nmi: 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); diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index e3c80e9..6ed2234 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -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 -- 1.6.3
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