ftrace: Allow access to the boot time function enabling

Change set_ftrace_early_filter() to ftrace_set_early_filter()
and make it a global function. This will allow other subsystems
in the kernel to be able to enable function tracing at start
up and reuse the ftrace function parsing code.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index d1ff0de18970132e25ea1258f036057f84441267..41df6f501656fba4e2e6891e613561634805d777 100644 (file)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -235,6 +235,9 @@ ssize_t ftrace_notrace_write(struct file *file, const char __user *ubuf,
 loff_t ftrace_regex_lseek(struct file *file, loff_t offset, int origin);
 int ftrace_regex_release(struct inode *inode, struct file *file);
 
+void __init
+ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable);
+
 /* defined in arch */
 extern int ftrace_ip_converted(unsigned long ip);
 extern int ftrace_dyn_arch_init(void *data);

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 5728d9aa632e3c47aafe1869311a98a0743b96fa..683d559a0eefef4cc9495c1b97fcbee0836065e1 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3279,8 +3279,8 @@ static void __init set_ftrace_early_graph(char *buf)
 }
 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
 
-static void __init
-set_ftrace_early_filter(struct ftrace_ops *ops, char *buf, int enable)
+void __init
+ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable)
 {
        char *func;
 
@@ -3293,9 +3293,9 @@ set_ftrace_early_filter(struct ftrace_ops *ops, char *buf, int enable)
 static void __init set_ftrace_early_filters(void)
 {
        if (ftrace_filter_buf[0])
-               set_ftrace_early_filter(&global_ops, ftrace_filter_buf, 1);
+               ftrace_set_early_filter(&global_ops, ftrace_filter_buf, 1);
        if (ftrace_notrace_buf[0])
-               set_ftrace_early_filter(&global_ops, ftrace_notrace_buf, 0);
+               ftrace_set_early_filter(&global_ops, ftrace_notrace_buf, 0);
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
        if (ftrace_graph_buf[0])
                set_ftrace_early_graph(ftrace_graph_buf);