Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753113AbaBQQyl (ORCPT ); Mon, 17 Feb 2014 11:54:41 -0500 Received: from mail-ig0-f175.google.com ([209.85.213.175]:60560 "EHLO mail-ig0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751962AbaBQQyh (ORCPT ); Mon, 17 Feb 2014 11:54:37 -0500 MIME-Version: 1.0 In-Reply-To: <20140217155725.20337.52848.stgit@patser> References: <20140217155056.20337.25254.stgit@patser> <20140217155725.20337.52848.stgit@patser> Date: Mon, 17 Feb 2014 11:54:37 -0500 Message-ID: Subject: Re: [PATCH 5/6] reservation: add support for fences to enable cross-device synchronisation From: Rob Clark To: Maarten Lankhorst Cc: Linux Kernel Mailing List , linux-arch@vger.kernel.org, Colin Cross , "linaro-mm-sig@lists.linaro.org" , "dri-devel@lists.freedesktop.org" , Daniel Vetter , Sumit Semwal , "linux-media@vger.kernel.org" Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 17, 2014 at 10:58 AM, Maarten Lankhorst wrote: > Signed-off-by: Maarten Lankhorst Reviewed-by: Rob Clark > --- > include/linux/reservation.h | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/include/linux/reservation.h b/include/linux/reservation.h > index 813dae960ebd..92c4851b5a39 100644 > --- a/include/linux/reservation.h > +++ b/include/linux/reservation.h > @@ -6,7 +6,7 @@ > * Copyright (C) 2012 Texas Instruments > * > * Authors: > - * Rob Clark > + * Rob Clark > * Maarten Lankhorst > * Thomas Hellstrom > * > @@ -40,22 +40,38 @@ > #define _LINUX_RESERVATION_H > > #include > +#include > > extern struct ww_class reservation_ww_class; > > struct reservation_object { > struct ww_mutex lock; > + > + struct fence *fence_excl; > + struct fence **fence_shared; > + u32 fence_shared_count, fence_shared_max; > }; > > static inline void > reservation_object_init(struct reservation_object *obj) > { > ww_mutex_init(&obj->lock, &reservation_ww_class); > + > + obj->fence_shared_count = obj->fence_shared_max = 0; > + obj->fence_shared = NULL; > + obj->fence_excl = NULL; > } > > static inline void > reservation_object_fini(struct reservation_object *obj) > { > + int i; > + > + if (obj->fence_excl) > + fence_put(obj->fence_excl); > + for (i = 0; i < obj->fence_shared_count; ++i) > + fence_put(obj->fence_shared[i]); > + > ww_mutex_destroy(&obj->lock); > } > > -- 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/