tracing: Factorize the events profile accounting

Factorize the events enabling accounting in a common tracing core
helper. This reduces the size of the profile_enable() and
profile_disable() callbacks for each trace events.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>

2 files changed, 10 insertions, 18 deletions

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index bd099ba82ccc..bc103d7b1ca8 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -130,8 +130,8 @@ struct ftrace_event_call {
         void                    *data;
 
         atomic_t                profile_count;
-        int                     (*profile_enable)(struct ftrace_event_call *);
-        void                    (*profile_disable)(struct ftrace_event_call *);
+        int                     (*profile_enable)(void);
+        void                    (*profile_disable)(void);
 };
 
 #define MAX_FILTER_PRED         32
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index a8e37821cc60..7d9803cbb20f 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -100,33 +100,25 @@ struct perf_counter_attr;
 
 #ifdef CONFIG_EVENT_PROFILE
 #define TRACE_SYS_ENTER_PROFILE(sname)                                         \
-static int prof_sysenter_enable_##sname(struct ftrace_event_call *event_call)  \
+static int prof_sysenter_enable_##sname(void)                                  \
 {                                                                              \
-        int ret = 0;                                                           \
-        if (!atomic_inc_return(&event_enter_##sname.profile_count))            \
-                ret = reg_prof_syscall_enter("sys"#sname);                     \
-        return ret;                                                            \
+        return reg_prof_syscall_enter("sys"#sname);                            \
 }                                                                              \
                                                                                \
-static void prof_sysenter_disable_##sname(struct ftrace_event_call *event_call)\
+static void prof_sysenter_disable_##sname(void)                                \
 {                                                                              \
-        if (atomic_add_negative(-1, &event_enter_##sname.profile_count))       \
-                unreg_prof_syscall_enter("sys"#sname);                         \
+        unreg_prof_syscall_enter("sys"#sname);                                 \
 }
 
 #define TRACE_SYS_EXIT_PROFILE(sname)                                          \
-static int prof_sysexit_enable_##sname(struct ftrace_event_call *event_call)   \
+static int prof_sysexit_enable_##sname(void)                                   \
 {                                                                              \
-        int ret = 0;                                                           \
-        if (!atomic_inc_return(&event_exit_##sname.profile_count))             \
-                ret = reg_prof_syscall_exit("sys"#sname);                      \
-        return ret;                                                            \
+        return reg_prof_syscall_exit("sys"#sname);                             \
 }                                                                              \
                                                                                \
-static void prof_sysexit_disable_##sname(struct ftrace_event_call *event_call) \
+static void prof_sysexit_disable_##sname(void)                                 \
 {                                                                              \
-        if (atomic_add_negative(-1, &event_exit_##sname.profile_count))        \
-                unreg_prof_syscall_exit("sys"#sname);                          \
+        unreg_prof_syscall_exit("sys"#sname);                                  \
 }
 
 #define TRACE_SYS_ENTER_PROFILE_INIT(sname)                                    \