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In-Reply-To: <1363283435-7666-14-git-send-email-kirill.shutemov@linux.intel.com>
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	<1363283435-7666-14-git-send-email-kirill.shutemov@linux.intel.com>
Date: Fri, 15 Mar 2013 10:34:47 +0800
Message-ID: <CAJd=RBCHLigJBWiBt==wjjm7HA3CYSSyS6odKy0BgoudVxN80g@mail.gmail.com>
Subject: Re: [PATCHv2, RFC 13/30] thp, mm: implement grab_cache_huge_page_write_begin()
From: Hillf Danton <dhillf@gmail.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Al Viro <viro@zeniv.linux.org.uk>, Hugh Dickins <hughd@google.com>,
        Wu Fengguang <fengguang.wu@intel.com>, Jan Kara <jack@suse.cz>,
        Mel Gorman <mgorman@suse.de>, linux-mm@kvack.org,
        Andi Kleen <ak@linux.intel.com>,
        Matthew Wilcox <matthew.r.wilcox@intel.com>,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
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On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
<kirill.shutemov@linux.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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