tree 3230a9f33bdb304b43d0a6bba64b48260171e311
parent 7a1481267999c02abf4a624515c1b5c7c1fccbd6
author Coly Li <colyli@suse.de> 1595678423 +0800
committer Jens Axboe <axboe@kernel.dk> 1595684300 -0600

bcache: add read_super_common() to read major part of super block

Later patches will introduce feature set bits to on-disk super block and
increase super block version. Current code in read_super() which reads
common part of super block for version BCACHE_SB_VERSION_CDEV and version
BCACHE_SB_VERSION_CDEV_WITH_UUID will be shared with the new version.

Therefore this patch moves the reusable part into read_super_common(),
this preparation patch will make later patches more simplier and only
focus on new feature set bits.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>