Description: bcachefs: grab s_umount only if snapshotting
References:
Notes:
 carnil> First introducing commit could not be determined.
Bugs:
upstream: released (6.8-rc1) [2acc59dd88d27ad69b66ded80df16c042b04eeec]
6.7-upstream-stable: released (6.7.5) [5b41d3fd04c6757b9c2a60a0c5b2609cae9999df]
6.6-upstream-stable: needed
6.1-upstream-stable: needed
5.10-upstream-stable: needed
4.19-upstream-stable: needed
sid: released (6.7.7-1)
6.1-bookworm-security: needed
5.10-bullseye-security: needed
4.19-buster-security: needed