From: Arnaldo Carvalho de Melo <[email protected]> We use:
BUG_ON(!RB_EMPTY_NODE(&thread->rb_node)); in the thread destructor as a debugging check to find out about possibly still referenced thread instances being deleted, to do that we need to make sure we use RB_CLEAR_NODE() right after rb_erase(), i.e. that we use the newly introduced rb_erase_init(), that works just like list_del_init(). Cc: Adrian Hunter <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: David Ahern <[email protected]> Cc: Don Zickus <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/machine.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 7ec3188d3cb3..6bf845758ae3 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -400,7 +400,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, * leader and that would screwed the rb tree. */ if (thread__init_map_groups(th, machine)) { - rb_erase(&th->rb_node, &machine->threads); + rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); thread__delete(th); return NULL; @@ -1314,7 +1314,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th, BUG_ON(atomic_read(&th->refcnt) == 0); if (lock) pthread_rwlock_wrlock(&machine->threads_lock); - rb_erase(&th->rb_node, &machine->threads); + rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); /* * Move it first to the dead_threads list, then drop the reference, -- 2.1.0 -- 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/
