mm: fix kernel-doc warning from tlb_flush_rmaps()

mm: fix kernel-doc warning from tlb_flush_rmaps()

Patch series "Improve mm documentation".

If you build with W=1, kernel-doc complains about tlb_flush_rmaps().  Then
I ran scripts/find-unused-docs.sh against mm/ and found a large number of
files which weren't included in the ReST documentation.  I fixed up a
couple of them, and added all those without erros to the rst files.
There's a lot more work to do to organise all of this, but at least now if
we have documentation that refers to these functions, we'll get a nice
link to them.

This patch (of 4):

The vma parameter wasn't described.

Link: https://lkml.kernel.org/r/20230818200630.2719595-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20230818200630.2719595-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>