btrfs: fix argument type of btrfs_bio_clone_partial()

The offset and can never be negative use unsigned int instead of int
type for them.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent_io.c

@@ -3161,11 +3161,13 @@ struct bio *btrfs_io_bio_alloc(unsigned int nr_iovecs)
 	return bio;
 }
 
-struct bio *btrfs_bio_clone_partial(struct bio *orig, int offset, int size)
+struct bio *btrfs_bio_clone_partial(struct bio *orig, u64 offset, u64 size)
 {
 	struct bio *bio;
 	struct btrfs_io_bio *btrfs_bio;
 
+	ASSERT(offset <= UINT_MAX && size <= UINT_MAX);
+
 	/* this will never fail when it's backed by a bioset */
 	bio = bio_clone_fast(orig, GFP_NOFS, &btrfs_bioset);
 	ASSERT(bio);

fs/btrfs/extent_io.h

@@ -280,7 +280,7 @@ void extent_clear_unlock_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
 struct bio *btrfs_bio_alloc(u64 first_byte);
 struct bio *btrfs_io_bio_alloc(unsigned int nr_iovecs);
 struct bio *btrfs_bio_clone(struct bio *bio);
-struct bio *btrfs_bio_clone_partial(struct bio *orig, int offset, int size);
+struct bio *btrfs_bio_clone_partial(struct bio *orig, u64 offset, u64 size);
 
 int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
 		      u64 length, u64 logical, struct page *page,