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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>
This commit is contained in:
Rong Tao 2022-11-09 22:34:25 +08:00 committed by Andrew Morton
parent 08fc35f31b
commit fc0e738792
1 changed files with 1 additions and 1 deletions
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2
lib/radix-tree.c
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@ -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)