Re: [PATCH] fs/namei: Remove redundant DCACHE_MANAGED_DENTRY check in __follow_mount_rcu

[Christian Brauner]

On Mon, 05 Jan 2026 07:10:27 -0800, Breno Leitao wrote:
> The check for DCACHE_MANAGED_DENTRY at the start of __follow_mount_rcu()
> is redundant because the only caller (handle_mounts) already verifies
> d_managed(dentry) before calling this function, so, dentry in
> __follow_mount_rcu() has always DCACHE_MANAGED_DENTRY set.
> 
> This early-out optimization never fires in practice - but it is marking
> as likely().
> 
> [...]

Applied to the vfs-7.0.misc branch of the vfs/vfs.git tree.
Patches in the vfs-7.0.misc 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: vfs-7.0.misc

[1/1] fs/namei: Remove redundant DCACHE_MANAGED_DENTRY check in __follow_mount_rcu
      https://git.kernel.org/vfs/vfs/c/a6b9f5b2f04b