iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

XArray tests: RCU lock prohibits GFP_KERNEL

Browse Source 
Drop and reacquire the RCU read lock while using GFP_KERNEL.

Reported-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2019-02-04 23:12:08 -05:00
parent 8834f5600c
commit bd54211b8e
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/test_xarray.c
View File

@ -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));