From bd54211b8e199ffb701ec98bf4f301e4a6f38a92 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Mon, 4 Feb 2019 23:12:08 -0500 Subject: XArray tests: RCU lock prohibits GFP_KERNEL Drop and reacquire the RCU read lock while using GFP_KERNEL. Reported-by: Li RongQing Signed-off-by: Matthew Wilcox --- lib/test_xarray.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'lib/test_xarray.c') diff --git a/lib/test_xarray.c b/lib/test_xarray.c index c596a957f764..671a93ee09e6 100644 --- a/lib/test_xarray.c +++ b/lib/test_xarray.c @@ -107,8 +107,11 @@ static noinline void check_xas_retry(struct xarray *xa) XA_BUG_ON(xa, xas.xa_node != XAS_RESTART); XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0)); XA_BUG_ON(xa, xas.xa_node != NULL); + rcu_read_unlock(); XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL); + + rcu_read_lock(); XA_BUG_ON(xa, !xa_is_internal(xas_reload(&xas))); xas.xa_node = XAS_RESTART; XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0)); -- cgit v1.2.3-58-ga151