From: Matthew Wilcox (Oracle) willy@infradead.org
[ 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) willy@infradead.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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;