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-rw-r--r--fs/btrfs/file-item.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 2fc803da4680..d0d571c47d33 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -27,8 +27,9 @@
#include "print-tree.h"
#include "compression.h"
-#define __MAX_CSUM_ITEMS(r, size) \
- ((unsigned long)(((BTRFS_MAX_ITEM_SIZE(r) * 2) / size) - 1))
+#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \
+ sizeof(struct btrfs_item) * 2) / \
+ size) - 1))
#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \
PAGE_SIZE))