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Date:   Sat, 4 Dec 2021 23:53:26 +0000
From:   Matthew Wilcox <willy@infradead.org>
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Andrew Morton <akpm@linux-foundation.org>,
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        linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] mm: split out anon_vma declarations to separate header
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On Sat, Dec 04, 2021 at 06:42:17PM +0100, Arnd Bergmann wrote:
> This should not really be part of linux/mm_types.h in the first
> place, as that header is meant to only contain structure defintions
> and need a minimum set of indirect includes itself. While the
> header clearly includes more than it should at this point, let's
> not make it worse by including string.h as well, which would
> pull in the expensive (compile-speed wise) fortify-string logic.
> 
> Move the new functions to a separate header that is only included
> where necessary to avoid bloating linux/mm_types.h further.

We already have an mm_inline.h.  Why do we need a new header file?