From fc0e7387926d7704ba54ff0d20db80051392583d Mon Sep 17 00:00:00 2001
From: Rong Tao <rongtao@cestc.cn>
Date: Wed, 9 Nov 2022 22:34:25 +0800
Subject: [PATCH] lib/radix-tree.c: fix uninitialized variable compilation
warning
We need to set an initial value for offset to eliminate compilation
warning.
How to reproduce warning:
$ make -C tools/testing/radix-tree
radix-tree.c: In function `radix_tree_tag_clear':
radix-tree.c:1046:17: warning: `offset' may be used uninitialized in this function [-Wmaybe-uninitialized]
1046 | node_tag_clear(root, parent, tag, offset);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Link: https://lkml.kernel.org/r/tencent_DF74099967595DCEA93CBDC28D062026180A@qq.com
Signed-off-by: Rong Tao <rongtao@cestc.cn>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
lib/radix-tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 3c78e1e8b2ad6..049ba132f7ef5 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1029,7 +1029,7 @@ void *radix_tree_tag_clear(struct radix_tree_root *root,
{
struct radix_tree_node *node, *parent;
unsigned long maxindex;
- int offset;
+ int offset = 0;
radix_tree_load_root(root, &node, &maxindex);
if (index > maxindex)
--
2.30.2