> The patch given below replaces the goto-loop by a while-based one.

That certainly looks fine.  I would also replace the 'return' with
'break', but I guess that's more of a question of personal preference.

quoted text
> Besides, it removes the export for the same routine, because there are
> no users for it outside of the core VFS code.

This doesn't look fine.  Did you test this?

mntput_no_expire() is called from mntput() which is an inline function
in mount.h.  So lots of callers of mntput() in modules will end up
trying to call mntput_no_expire() from modules.

$ nm fs/fuse/fuse.ko | grep mntput_no_expire
                 U mntput_no_expire

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