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Date: Mon, 27 Apr 2026 08:15:47 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: "David Hildenbrand (Arm)" <david@kernel.org>, Yoshinori Sato
 <ysato@users.sourceforge.jp>, Rich Felker <dalias@libc.org>, John Paul
 Adrian Glaubitz <glaubitz@physik.fu-berlin.de>, Alexei Starovoitov
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Subject: Re: [PATCH 2/3] bpf: arena: use page_ref_count() instead of
 page_mapped() in arena_free_pages()
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On Mon, 27 Apr 2026 16:00:59 +0100 Alexei Starovoitov <alexei.starovoitov@gmail.com> wrote:

> > >
> > > Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
> > > ---
> > >  kernel/bpf/arena.c | 2 +-
> >
> > BPF maintainers will probably want to carry this in the BPF tree.
> > That's fine - please go ahead and add it.  I'll carry a duplicate in
> > mm.git so it compiles.
> 
> We cannot carry the same patch in 2 trees.

Git is fine with that.

> Sooner or later it will create problems for linux-next
> and issues during merge window if more changes
> are done in the same area.
> The only way to share a patch between trees is to
> create a stable branch and pull it into 2 trees
> then sha will be the same,

For a single one-line patch?