tree 4694a109291d4c7f4a0b2c99974e56edcc8c5d8d
parent 600b6cf468b038798313da42d2438c10bcb10261
author David Sterba <dsterba@suse.com> 1542903406 +0100
committer David Sterba <dsterba@suse.com> 1545054700 +0100

btrfs: remove redundant csum buffer in btrfs_io_bio

The io_bio tracks checksums and has an inline buffer or an allocated
one. And there's a third member that points to the right one, but we
don't need to use an extra pointer for that. Let btrfs_io_bio::csum
point to the right buffer and check that the inline buffer is not
accidentally freed.

This shrinks struct btrfs_io_bio by 8 bytes.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>