From: Steven Rostedt (Red Hat) Date: Wed, 26 Feb 2014 15:54:36 +0000 (-0500) Subject: tracepoint: Do not waste memory on mods with no tracepoints X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7dec935a3aa04412cba2cebe1524ae0d34a30c24;p=linux-beck.git 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 Signed-off-by: Steven Rostedt --- 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);