diff options
| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-02-02 10:15:22 -0500 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-02-03 10:58:48 -0500 |
| commit | 555fc7813eeada1738eca42aa9f9ebafd7dc23e6 (patch) | |
| tree | f32cd06960de34b6d90f4bc018d1ee55ce735e39 /kernel/trace/ftrace.c | |
| parent | 2b2c279c814112e15577757ec593aa78465e2e56 (diff) | |
| download | linux-555fc7813eeada1738eca42aa9f9ebafd7dc23e6.tar.bz2 | |
ftrace: Replace (void *)1 with a meaningful macro name FTRACE_GRAPH_EMPTY
When the set_graph_function or set_graph_notrace contains no records, a
banner is displayed of either "#### all functions enabled ####" or
"#### all functions disabled ####" respectively. To tell the seq operations
to do this, (void *)1 is passed as a return value. Instead of using a
hardcoded meaningless variable, define it as a macro.
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 1595df0d7d79..a9cfc8713198 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -4561,6 +4561,8 @@ enum graph_filter_type { GRAPH_FILTER_FUNCTION, }; +#define FTRACE_GRAPH_EMPTY ((void *)1) + struct ftrace_graph_data { struct ftrace_hash *hash; struct ftrace_func_entry *entry; @@ -4616,7 +4618,7 @@ static void *g_start(struct seq_file *m, loff_t *pos) /* Nothing, tell g_show to print all functions are enabled */ if (ftrace_hash_empty(fgd->hash) && !*pos) - return (void *)1; + return FTRACE_GRAPH_EMPTY; fgd->idx = 0; fgd->entry = NULL; @@ -4635,7 +4637,7 @@ static int g_show(struct seq_file *m, void *v) if (!entry) return 0; - if (entry == (void *)1) { + if (entry == FTRACE_GRAPH_EMPTY) { struct ftrace_graph_data *fgd = m->private; if (fgd->type == GRAPH_FILTER_FUNCTION) |