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Subject[PATCH] btrfs: tree-checker: use %zu format string for size_t
We now get a harmless compile-time on 32-bit architectures:

fs/btrfs/tree-checker.c: In function 'check_extent_data_item':
fs/btrfs/tree-checker.c:189:70: error: format '%lu' expects argument of type 'long unsigned int', but argument 6 has type 'unsigned int' [-Werror=format=]

This changes the format string to use %zu instead of %lu for size_t.

Fixes: c1f6520bf360 ("btrfs: tree-checker: Enhance output for check_extent_data_item")
Signed-off-by: Arnd Bergmann <>
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 c7a09cc2a17c..388fb6553aa5 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -186,7 +186,7 @@ static int check_extent_data_item(struct btrfs_root *root,
/* Regular or preallocated extent has fixed item size */
if (item_size != sizeof(*fi)) {
file_extent_err(root, leaf, slot,
- "invalid item size for reg/prealloc file extent, have %u expect %lu",
+ "invalid item size for reg/prealloc file extent, have %u expect %zu",
item_size, sizeof(*fi));
return -EUCLEAN;
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