From b3dd7ba7d862707800c7ac45068f14ade2b65155 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Wed, 27 May 2009 11:04:26 +0800 Subject: [PATCH] tracing/stat: change dummpy_cmp() to return -1 Currently the output of trace_stat/workqueues is totally reversed: # cat /debug/tracing/trace_stat/workqueues ... 1 17 17 210 37 `-blk_unplug_work+0x0/0x57 1 3779 3779 181 11 |-cfq_kick_queue+0x0/0x2f 1 3796 3796 kblockd/1:120 ... The correct output should be: 1 3796 3796 kblockd/1:120 1 3779 3779 181 11 |-cfq_kick_queue+0x0/0x2f 1 17 17 210 37 `-blk_unplug_work+0x0/0x57 It's caused by "tracing/stat: replace linked list by an rbtree for sorting" (53059c9b67a62a3dc8c80204d3da42b9267ea5a0). dummpy_cmp() should return -1, so rb_node will always be inserted as right-most node in the rbtree, thus we sort the output in ascending order. [ Impact: fix the output of trace_stat/workqueues ] Signed-off-by: Li Zefan Signed-off-by: Frederic Weisbecker --- kernel/trace/trace_stat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_stat.c b/kernel/trace/trace_stat.c index 0bd0fc82da5d..5816d1aebcc9 100644 --- a/kernel/trace/trace_stat.c +++ b/kernel/trace/trace_stat.c @@ -127,7 +127,7 @@ insert_stat(struct rb_root *root, struct stat_node *data, cmp_stat_t cmp) */ static int dummy_cmp(void *p1, void *p2) { - return 1; + return -1; } /* -- 2.20.1