From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B7381C432C0 for ; Sun, 1 Dec 2019 01:53:54 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 738C02084D for ; Sun, 1 Dec 2019 01:53:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="NTV2F+09" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 738C02084D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2509F6B02EF; Sat, 30 Nov 2019 20:53:54 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 230876B02F1; Sat, 30 Nov 2019 20:53:54 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 163996B02F2; Sat, 30 Nov 2019 20:53:54 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0124.hostedemail.com [216.40.44.124]) by kanga.kvack.org (Postfix) with ESMTP id 008246B02EF for ; Sat, 30 Nov 2019 20:53:53 -0500 (EST) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id AADC4181AEF0B for ; Sun, 1 Dec 2019 01:53:53 +0000 (UTC) X-FDA: 76214901546.08.death40_21f815bd3d73c X-HE-Tag: death40_21f815bd3d73c X-Filterd-Recvd-Size: 4224 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf25.hostedemail.com (Postfix) with ESMTP for ; Sun, 1 Dec 2019 01:53:53 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2BA7B208E4; Sun, 1 Dec 2019 01:53:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575165232; bh=DELTp0hAw/1OSTKXwxXO9joXbTpcMCh6EjTSDgDOu2c=; h=Date:From:To:Subject:From; b=NTV2F+09xGpLweWQkzynjeNzTsop/NdGrEiq4Xhd71dczeSO5tXOyq+OrNuR7rYlR jIIHe2NYAYGCn+ok4iEgCz8pNSx4EZodYXt/dL8UWSgxSTZ93XKINRCaEKeWEYxrfZ RvlblEckaCuI3SFU+/1TYGtJme627Z7cd74ti6DE= Date: Sat, 30 Nov 2019 17:53:51 -0800 From: akpm@linux-foundation.org To: akpm@linux-foundation.org, cai@lca.pw, dan.j.williams@intel.com, david@redhat.com, haiyangz@microsoft.com, kys@microsoft.com, linux-mm@kvack.org, mhocko@suse.com, mm-commits@vger.kernel.org, osalvador@suse.com, pasha.tatashin@soleen.com, richard.weiyang@gmail.com, sashal@kernel.org, sthemmin@microsoft.com, torvalds@linux-foundation.org Subject: [patch 076/158] mm/memory_hotplug: export generic_online_page() Message-ID: <20191201015351.qnEi-XxC0%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: David Hildenbrand Subject: mm/memory_hotplug: export generic_online_page() Patch series "mm/memory_hotplug: Export generic_online_page()". Let's replace the __online_page...() functions by generic_online_page(). Hyper-V only wants to delay the actual onlining of un-backed pages, so we can simpy re-use the generic function. This patch (of 3): Let's expose generic_online_page() so online_page_callback users can simply fall back to the generic implementation when actually deciding to online the pages. Link: http://lkml.kernel.org/r/20190909114830.662-2-david@redhat.com Signed-off-by: David Hildenbrand Acked-by: Michal Hocko Cc: Oscar Salvador Cc: Pavel Tatashin Cc: Dan Williams Cc: Wei Yang Cc: Qian Cai Cc: Haiyang Zhang Cc: "K. Y. Srinivasan" Cc: Sasha Levin Cc: Stephen Hemminger Signed-off-by: Andrew Morton --- include/linux/memory_hotplug.h | 1 + mm/memory_hotplug.c | 5 ++--- 2 files changed, 3 insertions(+), 3 deletions(-) --- a/include/linux/memory_hotplug.h~mm-memory_hotplug-export-generic_online_page +++ a/include/linux/memory_hotplug.h @@ -102,6 +102,7 @@ extern unsigned long __offline_isolated_ typedef void (*online_page_callback_t)(struct page *page, unsigned int order); +extern void generic_online_page(struct page *page, unsigned int order); extern int set_online_page_callback(online_page_callback_t callback); extern int restore_online_page_callback(online_page_callback_t callback); --- a/mm/memory_hotplug.c~mm-memory_hotplug-export-generic_online_page +++ a/mm/memory_hotplug.c @@ -49,8 +49,6 @@ * and restore_online_page_callback() for generic callback restore. */ -static void generic_online_page(struct page *page, unsigned int order); - static online_page_callback_t online_page_callback = generic_online_page; static DEFINE_MUTEX(online_page_callback_lock); @@ -617,7 +615,7 @@ void __online_page_free(struct page *pag } EXPORT_SYMBOL_GPL(__online_page_free); -static void generic_online_page(struct page *page, unsigned int order) +void generic_online_page(struct page *page, unsigned int order) { kernel_map_pages(page, 1 << order, 1); __free_pages_core(page, order); @@ -627,6 +625,7 @@ static void generic_online_page(struct p totalhigh_pages_add(1UL << order); #endif } +EXPORT_SYMBOL_GPL(generic_online_page); static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages, void *arg) _