btrfs: cleanup duplicated parameters related to can_nocow_file_extent_args

The following functions and structures can be simplified using the
btrfs_file_extent structure:

- can_nocow_extent()
  No need to return ram_bytes/orig_block_len through the parameter list,
  the @file_extent parameter contains all the needed info.

- can_nocow_file_extent_args
  The following members are no longer needed:

  * disk_bytenr
    This one is confusing as it's not really the
    btrfs_file_extent_item::disk_bytenr, but where the IO would be,
    thus it's file_extent::disk_bytenr + file_extent::offset now.

  * num_bytes
    Now file_extent::num_bytes.

  * extent_offset
    Now file_extent::offset.

  * disk_num_bytes
    Now file_extent::disk_num_bytes.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 12b0b7696601..be2f66f29b0c 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -528,8 +528,7 @@ struct btrfs_file_extent {
 };
 
 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
-			      u64 *orig_block_len,
-			      u64 *ram_bytes, struct btrfs_file_extent *file_extent,
+			      struct btrfs_file_extent *file_extent,
 			      bool nowait, bool strict);
 
 void btrfs_del_delalloc_inode(struct btrfs_inode *inode);