On Tue, Mar 10, 2020 at 11:30:27PM +0800, He Zhe wrote:

quoted

So this is the exact requirement of commits to be reverted from a bisect
or just a first guess?

Many commits failed to build or boot during bisection.

At least the following four have to be reverted to make it work.

979c690d block: move clearing bd_invalidated into check_disk_size_change
f0b870d block: remove (__)blkdev_reread_part as an exported API
142fe8f block: fix bdev_disk_changed for non-partitioned devices
a1548b6 block: move rescan_partitions to fs/block_dev.c

Just to make sure we are on the same page:  if you revert all four it
works, if you rever all but

a1548b6 block: move rescan_partitions to fs/block_dev.c

it doesn't?