btrfs: optimize variables size in btrfs_submit_compressed_write

Patch "btrfs: reduce compressed_bio member's types" reduced some
member's size. Function arguments @len, @compressed_len and @nr_pages
can be declared as unsigned int.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/compression.c

@@ -387,10 +387,10 @@ static void end_compressed_bio_write(struct bio *bio)
  * the end io hooks.
  */
 blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
-				 unsigned long len, u64 disk_start,
-				 unsigned long compressed_len,
+				 unsigned int len, u64 disk_start,
+				 unsigned int compressed_len,
 				 struct page **compressed_pages,
-				 unsigned long nr_pages,
+				 unsigned int nr_pages,
 				 unsigned int write_flags,
 				 struct cgroup_subsys_state *blkcg_css)
 {

fs/btrfs/compression.h

@@ -91,10 +91,10 @@ int btrfs_decompress_buf2page(const char *buf, unsigned long buf_start,
 			      struct bio *bio);
 
 blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
-				  unsigned long len, u64 disk_start,
-				  unsigned long compressed_len,
+				  unsigned int len, u64 disk_start,
+				  unsigned int compressed_len,
 				  struct page **compressed_pages,
-				  unsigned long nr_pages,
+				  unsigned int nr_pages,
 				  unsigned int write_flags,
 				  struct cgroup_subsys_state *blkcg_css);
 blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,