maple_tree: change RCU checks to WARN_ON() instead of BUG_ON()

If RCU is enabled and the tree isn't locked, just warn the user and avoid
crashing the kernel.

Link: https://lkml.kernel.org/r/20230518145544.1722059-9-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Vernon Yang <vernon2gm@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
index 204d794..ed92abf 100644 (file)
--- a/include/linux/maple_tree.h
+++ b/include/linux/maple_tree.h
@@ -616,7 +616,7 @@ static inline void mt_clear_in_rcu(struct maple_tree *mt)
                return;
 
        if (mt_external_lock(mt)) {
-               BUG_ON(!mt_lock_is_held(mt));
+               WARN_ON(!mt_lock_is_held(mt));
                mt->ma_flags &= ~MT_FLAGS_USE_RCU;
        } else {
                mtree_lock(mt);
@@ -635,7 +635,7 @@ static inline void mt_set_in_rcu(struct maple_tree *mt)
                return;
 
        if (mt_external_lock(mt)) {
-               BUG_ON(!mt_lock_is_held(mt));
+               WARN_ON(!mt_lock_is_held(mt));
                mt->ma_flags |= MT_FLAGS_USE_RCU;
        } else {
                mtree_lock(mt);