Re: [PATCH v3 0/3] revamp fs/filesystems.c

[Christian Brauner]

On Sun, 26 Apr 2026 00:08:41 +0200, Mateusz Guzik wrote:
> The file is a mess with a hand-rolled linked list in a desperate need of
> a clean up.
> 
> The code to emit /proc/filesystems is used frequently because libselinux
> reads the file, which in turn is linked into numerous frequently used
> programs (even ones you would not suspect, like sed!). In order to
> combat that pre-gen the string instead of pointer-chasing and printfing
> one by-one.
> 
> [...]

Applied to the vfs-7.2.procfs branch of the vfs/vfs.git tree.
Patches in the vfs-7.2.procfs branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: master

[1/3] proc: allow to mark /proc files permanent outside of fs/proc/
      https://git.kernel.org/vfs/vfs/c/b26811a2ab58
[2/3] fs: RCU-ify filesystems list
      https://git.kernel.org/vfs/vfs/c/1fe9dc896f66
[3/3] fs: cache the string generated by reading /proc/filesystems
      https://git.kernel.org/vfs/vfs/c/3bd2c4fa951a