From 9402e23f90c5a672db7170e4c0f1fc80ca8c009a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 25 May 2015 11:49:11 -0300 Subject: [PATCH] perf tools: Import rb_erase_init from block/ in the kernel sources I was assuming rb_erase() was setting things up like list_del_init, but the fact that thread__delete() was being sucessfull is because the last thing before deleting is to remove the thread from the machine->dead_threads list, using list_del_init(), that has the same effect as using rb_erase_init()... Introduce this function so that we can use it when removing objects from rb_trees. Then we will be able to BUG_ON(still on a list) in destructors. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-55b16mbtndjyd7zzg8nmnamx@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/include/linux/rbtree.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/tools/perf/util/include/linux/rbtree.h b/tools/perf/util/include/linux/rbtree.h index 2a030c5af3aa..f06d89f0b867 100644 --- a/tools/perf/util/include/linux/rbtree.h +++ b/tools/perf/util/include/linux/rbtree.h @@ -1,2 +1,16 @@ +#ifndef __TOOLS_LINUX_PERF_RBTREE_H +#define __TOOLS_LINUX_PERF_RBTREE_H #include #include "../../../../include/linux/rbtree.h" + +/* + * Handy for checking that we are not deleting an entry that is + * already in a list, found in block/{blk-throttle,cfq-iosched}.c, + * probably should be moved to lib/rbtree.c... + */ +static inline void rb_erase_init(struct rb_node *n, struct rb_root *root) +{ + rb_erase(n, root); + RB_CLEAR_NODE(n); +} +#endif /* __TOOLS_LINUX_PERF_RBTREE_H */ -- 2.20.1