From 90b71ae8e5cf8b868b6a4de55c3cdf878cedfee3 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Thu, 1 Apr 2021 07:46:49 -0400 Subject: [PATCH] idr test suite: Create anchor before launching throbber [ Upstream commit 094ffbd1d8eaa27ed426feb8530cb1456348b018 ] The throbber could race with creation of the anchor entry and cause the IDR to have zero entries in it, which would cause the test to fail. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Sasha Levin --- tools/testing/radix-tree/idr-test.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/radix-tree/idr-test.c b/tools/testing/radix-tree/idr-test.c index 4a9b451b7ba0..6ce7460f3c7a 100644 --- a/tools/testing/radix-tree/idr-test.c +++ b/tools/testing/radix-tree/idr-test.c @@ -301,11 +301,11 @@ void idr_find_test_1(int anchor_id, int throbber_id) pthread_t throbber; time_t start = time(NULL); - pthread_create(&throbber, NULL, idr_throbber, &throbber_id); - BUG_ON(idr_alloc(&find_idr, xa_mk_value(anchor_id), anchor_id, anchor_id + 1, GFP_KERNEL) != anchor_id); + pthread_create(&throbber, NULL, idr_throbber, &throbber_id); + rcu_read_lock(); do { int id = 0;