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| author |   Namhyung Kim <namhyung.kim@lge.com> | 2013-10-14 17:24:23 +0900 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2013-10-18 22:15:25 -0400 |
| commit | 9aa72b4bf823b7b439fbba95fa84abee3b9d6d79 (patch) | |
| tree | 848399ae19cbfe4927fd60179c3c2f8f2d02e73a /kernel/trace | |
| parent | tracing: Fix potential out-of-bounds in trace_get_user() (diff) | |
| download | linux-dev-9aa72b4bf823b7b439fbba95fa84abee3b9d6d79.tar.xz linux-dev-9aa72b4bf823b7b439fbba95fa84abee3b9d6d79.zip | |
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>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/ftrace.c | 6 | ||||
| -rw-r--r-- | kernel/trace/trace.h | 3 |
2 files changed, 2 insertions, 7 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 03cf44ac54d3..a77e4a0142ee 100644 --- 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 10c86fb7a2b4..40211cef2796 100644 --- 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++) { |