linux-kernel - [PATCH next 1/2] btrfs: tree-checker: Fix error format string

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Date:   Fri,  8 Nov 2019 22:38:52 +0100
From:   Andreas Färber <afaerber@...e.de>
To:     Qu Wenruo <wqu@...e.com>, David Sterba <dsterba@...e.com>
Cc:     Johannes Thumshirn <jthumshirn@...e.de>, Chris Mason <clm@...com>,
        Josef Bacik <josef@...icpanda.com>,
        linux-btrfs@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH next 1/2] btrfs: tree-checker: Fix error format string

From: Andreas Färber <afaerber@...e.com>

Argument BTRFS_FILE_EXTENT_INLINE_DATA_START is defined as offsetof(),
which returns type size_t, so we need %zu instead of %lu.

This fixes a build warning on 32-bit arm:

  ../fs/btrfs/tree-checker.c: In function 'check_extent_data_item':
  ../fs/btrfs/tree-checker.c:230:43: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'unsigned int' [-Wformat=]
    230 |     "invalid item size, have %u expect [%lu, %u)",
        |                                         ~~^
        |                                           |
        |                                           long unsigned int
        |                                         %u

Fixes: a31ccb4b7ba2 ("btrfs: tree-checker: Check item size before reading file extent type")
Cc: Qu Wenruo <wqu@...e.com>
Cc: David Sterba <dsterba@...e.com>
Signed-off-by: Andreas Färber <afaerber@...e.com>
---
 fs/btrfs/tree-checker.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 493d4d9e0f79..092b8ece36d7 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -227,7 +227,7 @@ static int check_extent_data_item(struct extent_buffer *leaf,
 	 */
 	if (item_size < BTRFS_FILE_EXTENT_INLINE_DATA_START) {
 		file_extent_err(leaf, slot,
-				"invalid item size, have %u expect [%lu, %u)",
+				"invalid item size, have %u expect [%zu, %u)",
 				item_size, BTRFS_FILE_EXTENT_INLINE_DATA_START,
 				SZ_4K);
 		return -EUCLEAN;
-- 
2.16.4