regmap: cache: Use correct type of the rb_for_each() parameter

Compiler is not happy:

  regcache.c:410:9: warning: Using plain integer as NULL pointer

Replace integer 0 by NULL.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240606164717.3031107-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 2e41cb12b8e28284d65ef5d0ee8949d970a2e69d..bd7462c542716277927cf5528e86459e781caacc 100644 (file)
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -407,7 +407,7 @@ out:
         * have gone out of sync, force writes of all the paging
         * registers.
         */
-       rb_for_each(node, 0, &map->range_tree, rbtree_all) {
+       rb_for_each(node, NULL, &map->range_tree, rbtree_all) {
                struct regmap_range_node *this =
                        rb_entry(node, struct regmap_range_node, node);