linux-kernel - Re: [PATCHv2, RFC 13/30] thp, mm: implement grab_cache_huge_page_write

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Message-ID: <CAJd=RBCHLigJBWiBt==wjjm7HA3CYSSyS6odKy0BgoudVxN80g@mail.gmail.com>
Date:	Fri, 15 Mar 2013 10:34:47 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Hugh Dickins <hughd@...gle.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2, RFC 13/30] thp, mm: implement grab_cache_huge_page_write_begin()

On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
<kirill.shutemov@...ux.intel.com> wrote:
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> +struct page *grab_cache_huge_page_write_begin(struct address_space *mapping,
> +                       pgoff_t index, unsigned flags);
> +#else
> +static inline struct page *grab_cache_huge_page_write_begin(
> +               struct address_space *mapping, pgoff_t index, unsigned flags)
> +{
build bug?

> +       return NULL;
> +}
> +#endif
>
btw, how about grab_thp_write_begin?
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