From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
CC: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Hugh Dickins <hughd@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Dave Hansen <dave.hansen@intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Mel Gorman <mgorman@techsingularity.net>,
        Michal Hocko <mhocko@kernel.org>, "Vlastimil Babka" <vbabka@suse.cz>,
        Pavel Emelyanov <xemul@parallels.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Naoya Horiguchi" <nao.horiguchi@gmail.com>
Subject: Re: [PATCH v1 11/11] mm: memory_hotplug: memory hotremove supports
 thp migration
Thread-Topic: [PATCH v1 11/11] mm: memory_hotplug: memory hotremove supports
 thp migration
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Date: Thu, 3 Mar 2016 08:40:17 +0000
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On Thu, Mar 03, 2016 at 04:41:58PM +0900, Naoya Horiguchi wrote:
> This patch enables thp migration for memory hotremove. Stub definition of
> prep_transhuge_page() is added for CONFIG_TRANSPARENT_HUGEPAGE=n.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> ---
>  include/linux/huge_mm.h | 3 +++
>  mm/memory_hotplug.c     | 8 ++++++++
>  mm/page_isolation.c     | 8 ++++++++
>  3 files changed, 19 insertions(+)
> 
> diff --git v4.5-rc5-mmotm-2016-02-24-16-18/include/linux/huge_mm.h v4.5-rc5-mmotm-2016-02-24-16-18_patched/include/linux/huge_mm.h
> index 09b215d..7944346 100644
> --- v4.5-rc5-mmotm-2016-02-24-16-18/include/linux/huge_mm.h
> +++ v4.5-rc5-mmotm-2016-02-24-16-18_patched/include/linux/huge_mm.h
> @@ -175,6 +175,9 @@ static inline bool thp_migration_supported(void)
>  #define transparent_hugepage_enabled(__vma) 0
>  
>  #define transparent_hugepage_flags 0UL
> +static inline void prep_transhuge_page(struct page *page)
> +{
> +}
>  static inline int
>  split_huge_page_to_list(struct page *page, struct list_head *list)
>  {

According to the warnings from kbuild bot, this chunk should come with
patch 8/11 or earlier. I'll fix this.

Thanks,
Naoya Horiguchi