[Bug 2086109] [NEW] Request: cherry-pick commit be2ca38 `Revert "fs/9p: simplify iget to remove unnecessary paths"`

Public bug reported:

Linux kernel v6.9 introduced a regression of 9pfs in the commit
<https://github.com/torvalds/linux/commit/724a084>, and it was fixed in
v6.12-rc5 (<https://github.com/torvalds/linux/commit/be2ca38>):

> This code simplification introduced significant regressions on servers
> that do not remap inode numbers when exporting multiple underlying
> filesystems with colliding inodes, as can be illustrated with simple
> tmpfs exports in qemu with remapping disabled:
> [...]


Could you consider cherry-picking the fix to Ubuntu 24.10's kernel 6.11 ?

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New

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https://bugs.launchpad.net/bugs/2086109

Title:
Request: cherry-pick commit be2ca38 `Revert "fs/9p: simplify iget to
remove unnecessary paths"`

Status in linux package in Ubuntu:
New

Bug description:
Linux kernel v6.9 introduced a regression of 9pfs in the commit
<https://github.com/torvalds/linux/commit/724a084>, and it was fixed
in v6.12-rc5 (<https://github.com/torvalds/linux/commit/be2ca38>):

> This code simplification introduced significant regressions on servers
> that do not remap inode numbers when exporting multiple underlying
> filesystems with colliding inodes, as can be illustrated with simple
> tmpfs exports in qemu with remapping disabled:
> [...]


Could you consider cherry-picking the fix to Ubuntu 24.10's kernel 6.11 ?

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