Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756776AbbEUTfv (ORCPT ); Thu, 21 May 2015 15:35:51 -0400 Received: from mail-qg0-f45.google.com ([209.85.192.45]:34000 "EHLO mail-qg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756386AbbEUTeI (ORCPT ); Thu, 21 May 2015 15:34:08 -0400 From: j.glisse@gmail.com To: akpm@linux-foundation.org Cc: , linux-mm@kvack.org, Linus Torvalds , , Mel Gorman , "H. Peter Anvin" , Peter Zijlstra , Andrea Arcangeli , Johannes Weiner , Larry Woodman , Rik van Riel , Dave Airlie , Brendan Conoboy , Joe Donohue , Duncan Poole , Sherry Cheung , Subhash Gutti , John Hubbard , Mark Hairgrove , Lucien Dunning , Cameron Buschardt , Arvind Gopalakrishnan , Haggai Eran , Shachar Raindel , Liran Liss , Roland Dreier , Ben Sander , Greg Stoner , John Bridgman , Michael Mantor , Paul Blinzer , Laurent Morichetti , Alexander Deucher , Oded Gabbay , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= Subject: [PATCH 15/36] memcg: export get_mem_cgroup_from_mm() Date: Thu, 21 May 2015 15:31:24 -0400 Message-Id: <1432236705-4209-16-git-send-email-j.glisse@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1432236705-4209-1-git-send-email-j.glisse@gmail.com> References: <1432236705-4209-1-git-send-email-j.glisse@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2220 Lines: 65 From: Jérôme Glisse Usefull for HMM when trying to uncharge freshly allocated anonymous pages after error inside migration memory migration path. Signed-off-by: Jérôme Glisse --- include/linux/memcontrol.h | 7 +++++++ mm/memcontrol.c | 3 ++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 6c89181..488748e 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -93,6 +93,7 @@ bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); +extern struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css); @@ -275,6 +276,12 @@ static inline struct cgroup_subsys_state return NULL; } + +static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) +{ + return NULL; +} + static inline struct mem_cgroup * mem_cgroup_iter(struct mem_cgroup *root, struct mem_cgroup *prev, diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 14c2f20..360d9e0 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -966,7 +966,7 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p) return mem_cgroup_from_css(task_css(p, memory_cgrp_id)); } -static struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) +struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) { struct mem_cgroup *memcg = NULL; @@ -988,6 +988,7 @@ static struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) rcu_read_unlock(); return memcg; } +EXPORT_SYMBOL(get_mem_cgroup_from_mm); /** * mem_cgroup_iter - iterate over memory cgroup hierarchy -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/