3.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: "Steven Rostedt (Red Hat)" <[email protected]> commit 7dec935a3aa04412cba2cebe1524ae0d34a30c24 upstream. 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 <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- kernel/tracepoint.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -641,6 +641,9 @@ static int tracepoint_module_coming(stru 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. @@ -684,6 +687,9 @@ static int tracepoint_module_going(struc { 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
