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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>
This commit is contained in:
Steven Rostedt 2011-12-19 21:57:44 -05:00 committed by Steven Rostedt
parent d2d45c7a03
commit 2a85a37f16
2 changed files with 7 additions and 4 deletions
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3
include/linux/ftrace.h
View File

@ -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);

8
kernel/trace/ftrace.c
View File

@ -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);