btrfs: lsblk multiple mount point issue on LTS 6.6

Greg,

A Gentoo user found an issue with btrfs where:

"... upstream commit a5d74fa24752 ("btrfs: avoid unnecessary device path update for the same device") breaks 6.6 LTS kernel behavior where previously lsblk can properly show multiple mount points of the same btrfs"

There's a revert on the bug report [1]. The fix by the author can be found on linux-btrfs [2]

[1] https://bugs.gentoo.org/947126 [2] https://lore.kernel.org/linux-btrfs/30aefd8b4e8c1f0c5051630b106a1ff3570d28ed...

Mike