linux-kernel - Re: [PATCH -V6 14/21] swap: Support to move swap account for PMD swap mapping

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Date:   Wed, 24 Oct 2018 10:27:49 -0700
From:   Daniel Jordan <daniel.m.jordan@...cle.com>
To:     Huang Ying <ying.huang@...el.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Shaohua Li <shli@...nel.org>, Hugh Dickins <hughd@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Rik van Riel <riel@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Zi Yan <zi.yan@...rutgers.edu>,
        Daniel Jordan <daniel.m.jordan@...cle.com>
Subject: Re: [PATCH -V6 14/21] swap: Support to move swap account for PMD
 swap mapping

On Wed, Oct 10, 2018 at 03:19:17PM +0800, Huang Ying wrote:
> +static struct page *mc_handle_swap_pmd(struct vm_area_struct *vma,
> +			pmd_t pmd, swp_entry_t *entry)
> +{

Got
/home/dbbench/linux/mm/memcontrol.c:4719:21: warning: ‘mc_handle_swap_pmd’ defined but not used [-Wunused-function]
 static struct page *mc_handle_swap_pmd(struct vm_area_struct *vma,
when
# CONFIG_TRANSPARENT_HUGEPAGE is not set