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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-02-26 16:54:36 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-03-04 03:23:08 +0100 |
| commit | 7dec935a3aa04412cba2cebe1524ae0d34a30c24 (patch) | |
| tree | 5fb2530f811f78cfa65310d0936975fbb90b0de8 /kernel/tracepoint.c | |
| parent | ftrace/x86: One more missing sync after fixup of function modification failure (diff) | |
| download | linux-7dec935a3aa04412cba2cebe1524ae0d34a30c24.tar.xz linux-7dec935a3aa04412cba2cebe1524ae0d34a30c24.zip | |
tracepoint: Do not waste memory on mods with no tracepoints
No reason to allocate tp_module structures for modules that have no
tracepoints. This just wastes memory.
Fixes: b75ef8b44b1c "Tracepoint: Dissociate from module mutex"
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/tracepoint.c')
| -rw-r--r-- | kernel/tracepoint.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c index 29f26540e9c9..0d4ef26574ff 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -636,6 +636,9 @@ static int tracepoint_module_coming(struct module *mod) struct tp_module *tp_mod, *iter; int ret = 0; + if (!mod->num_tracepoints) + return 0; + /* * We skip modules that taint the kernel, especially those with different * module headers (for forced load), to make sure we don't cause a crash. @@ -679,6 +682,9 @@ static int tracepoint_module_going(struct module *mod) { struct tp_module *pos; + if (!mod->num_tracepoints) + return 0; + mutex_lock(&tracepoints_mutex); tracepoint_update_probe_range(mod->tracepoints_ptrs, mod->tracepoints_ptrs + mod->num_tracepoints); |