From patchwork Thu May 28 21:15:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11576945 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B5D78739 for ; Thu, 28 May 2020 21:15:43 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9E4C9205CB for ; Thu, 28 May 2020 21:15:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E4C9205CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9C5016E7DA; Thu, 28 May 2020 21:15:38 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 308F66E7D3 for ; Thu, 28 May 2020 21:15:35 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from build.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 21327475-1500050 for multiple; Thu, 28 May 2020 22:15:25 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Thu, 28 May 2020 22:15:17 +0100 Message-Id: <20200528211524.29107-4-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200528211524.29107-1-chris@chris-wilson.co.uk> References: <20200528211524.29107-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 04/11] drm/i915: Add list_for_each_entry_safe_continue_reverse X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chris Wilson Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" One more list iterator variant, for when we want to unwind from inside one list iterator with the intention of restarting from the current entry as the new head of the list. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_utils.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h index 03a73d2bd50d..6ebccdd12d4c 100644 --- a/drivers/gpu/drm/i915/i915_utils.h +++ b/drivers/gpu/drm/i915/i915_utils.h @@ -266,6 +266,12 @@ static inline int list_is_last_rcu(const struct list_head *list, return READ_ONCE(list->next) == head; } +#define list_for_each_entry_safe_continue_reverse(pos, n, head, member) \ + for (pos = list_prev_entry(pos, member), \ + n = list_prev_entry(pos, member); \ + &pos->member != (head); \ + pos = n, n = list_prev_entry(n, member)) + /* * Wait until the work is finally complete, even if it tries to postpone * by requeueing itself. Note, that if the worker never cancels itself,