ftrace: Get rid of ftrace_graph_filter_enabled

The ftrace_graph_filter_enabled means that user sets function filter
and it always has same meaning of ftrace_graph_count > 0.

Link: http://lkml.kernel.org/r/1381739066-7531-2-git-send-email-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 03cf44ac54d3666b434a26a30bc6f7a1e34cbf56..a77e4a0142ee8ee2096fdbd2279902a79da00652 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3776,7 +3776,6 @@ static const struct file_operations ftrace_notrace_fops = {
 static DEFINE_MUTEX(graph_lock);
 
 int ftrace_graph_count;
-int ftrace_graph_filter_enabled;
 unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS] __read_mostly;
 
 static void *
@@ -3799,7 +3798,7 @@ static void *g_start(struct seq_file *m, loff_t *pos)
        mutex_lock(&graph_lock);
 
        /* Nothing, tell g_show to print all functions are enabled */
-       if (!ftrace_graph_filter_enabled && !*pos)
+       if (!ftrace_graph_count && !*pos)
                return (void *)1;
 
        return __g_next(m, pos);
@@ -3845,7 +3844,6 @@ ftrace_graph_open(struct inode *inode, struct file *file)
        mutex_lock(&graph_lock);
        if ((file->f_mode & FMODE_WRITE) &&
            (file->f_flags & O_TRUNC)) {
-               ftrace_graph_filter_enabled = 0;
                ftrace_graph_count = 0;
                memset(ftrace_graph_funcs, 0, sizeof(ftrace_graph_funcs));
        }
@@ -3925,8 +3923,6 @@ out:
        if (fail)
                return -EINVAL;
 
-       ftrace_graph_filter_enabled = !!(*idx);
-
        return 0;
 }
 

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 10c86fb7a2b4674c4433d30123562608ec72c59b..40211cef2796dc0545baa3ee252403d46cd641cb 100644 (file)
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -730,7 +730,6 @@ extern void __trace_graph_return(struct trace_array *tr,
 #ifdef CONFIG_DYNAMIC_FTRACE
 /* TODO: make this variable */
 #define FTRACE_GRAPH_MAX_FUNCS         32
-extern int ftrace_graph_filter_enabled;
 extern int ftrace_graph_count;
 extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
 
@@ -738,7 +737,7 @@ static inline int ftrace_graph_addr(unsigned long addr)
 {
        int i;
 
-       if (!ftrace_graph_filter_enabled)
+       if (!ftrace_graph_count)
                return 1;
 
        for (i = 0; i < ftrace_graph_count; i++) {