From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f48.google.com (mail-qg0-f48.google.com [209.85.192.48]) by kanga.kvack.org (Postfix) with ESMTP id 9334E6B01AB for ; Thu, 21 May 2015 16:24:13 -0400 (EDT) Received: by qgew3 with SMTP id w3so48106965qge.2 for ; Thu, 21 May 2015 13:24:13 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id q5si3143367qce.7.2015.05.21.13.24.12 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 21 May 2015 13:24:13 -0700 (PDT) From: jglisse@redhat.com Subject: [PATCH 23/36] HMM: allow to get pointer to spinlock protecting a directory. Date: Thu, 21 May 2015 16:22:59 -0400 Message-Id: <1432239792-5002-4-git-send-email-jglisse@redhat.com> In-Reply-To: <1432239792-5002-1-git-send-email-jglisse@redhat.com> References: <1432236705-4209-1-git-send-email-j.glisse@gmail.com> <1432239792-5002-1-git-send-email-jglisse@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , joro@8bytes.org, 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?= From: JA(C)rA'me Glisse Several use case for getting pointer to spinlock protecting a directory. Signed-off-by: JA(C)rA'me Glisse --- include/linux/hmm_pt.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/include/linux/hmm_pt.h b/include/linux/hmm_pt.h index 36f7e00..27668a8 100644 --- a/include/linux/hmm_pt.h +++ b/include/linux/hmm_pt.h @@ -255,6 +255,16 @@ static inline void hmm_pt_directory_lock(struct hmm_pt *pt, spin_lock(&pt->lock); } +static inline spinlock_t *hmm_pt_directory_lock_ptr(struct hmm_pt *pt, + struct page *ptd, + unsigned level) +{ + if (level) + return &ptd->ptl; + else + return &pt->lock; +} + static inline void hmm_pt_directory_unlock(struct hmm_pt *pt, struct page *ptd, unsigned level) @@ -272,6 +282,13 @@ static inline void hmm_pt_directory_lock(struct hmm_pt *pt, spin_lock(&pt->lock); } +static inline spinlock_t *hmm_pt_directory_lock_ptr(struct hmm_pt *pt, + struct page *ptd, + unsigned level) +{ + return &pt->lock; +} + static inline void hmm_pt_directory_unlock(struct hmm_pt *pt, struct page *ptd, unsigned level) @@ -397,6 +414,13 @@ static inline void hmm_pt_iter_directory_lock(struct hmm_pt_iter *iter, hmm_pt_directory_lock(pt, iter->ptd[pt->llevel - 1], pt->llevel); } +static inline spinlock_t *hmm_pt_iter_directory_lock_ptr(struct hmm_pt_iter *iter, + struct hmm_pt *pt) +{ + return hmm_pt_directory_lock_ptr(pt, iter->ptd[pt->llevel - 1], + pt->llevel); +} + static inline void hmm_pt_iter_directory_unlock(struct hmm_pt_iter *iter, struct hmm_pt *pt) { -- 1.9.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org