Link: https://lore.kernel.org/r/20230927-vfs-super-freeze-v1-7-ecc36d9ab4d9@xxxxxxxxxx Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx> --- Documentation/filesystems/porting.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index d69f59700a23..78fc854c9e41 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -1052,3 +1052,15 @@ kill_anon_super(), or kill_block_super() helpers. Lock ordering has been changed so that s_umount ranks above open_mutex again. All places where s_umount was taken under open_mutex have been fixed up. + +--- + +**recommended** + +Block device freezing and thawing have been moved to holder operations. + +Before this change, get_active_super() would only be able to find the +superblock of the main block device, i.e., the one stored in sb->s_bdev. Block +device freezing now works for any block device owned by a given superblock, not +just the main block device. The get_active_super() helper is gone, so are +bd_fsfreeze_sb, and bd_fsfreeze_mutex. -- 2.34.1
