diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 816e80e678bda7a27b9311f1bb22657fe58c02c4..d70feb54506678cd45855f300b690382ec57dfea 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2543,12 +2543,12 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
 		if (likely(uptodate)) {
 			loff_t i_size = i_size_read(inode);
 			pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
-			unsigned offset;
+			unsigned off;
 
 			/* Zero out the end if this page straddles i_size */
-			offset = i_size & (PAGE_CACHE_SIZE-1);
-			if (page->index == end_index && offset)
-				zero_user_segment(page, offset, PAGE_CACHE_SIZE);
+			off = i_size & (PAGE_CACHE_SIZE-1);
+			if (page->index == end_index && off)
+				zero_user_segment(page, off, PAGE_CACHE_SIZE);
 			SetPageUptodate(page);
 		} else {
 			ClearPageUptodate(page);