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Commit 7dec935a authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Steven Rostedt
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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: b75ef8b4 "Tracepoint: Dissociate from module mutex"
Acked-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 12729f14

kernel/tracepoint.c

+6 −0
Original line number Diff line number Diff line
@@ -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);