From patchwork Wed Nov 30 13:48:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 629843 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B15C1C433FE for ; Wed, 30 Nov 2022 13:49:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230132AbiK3NtO (ORCPT ); Wed, 30 Nov 2022 08:49:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230011AbiK3NtL (ORCPT ); Wed, 30 Nov 2022 08:49:11 -0500 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81DE3218BB; Wed, 30 Nov 2022 05:49:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1669816150; x=1701352150; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=EyJFPG6PhV/AwdfzlcYIAHQ0QmtsikwhVNregiJywak=; b=W6k2S1Pgs1JtmKpFI2qJvzwzACxulY1RmXNqcm0O432WGIjGJiTwpTCm 3qoKfHEdNRtiMMRQGecDTwMUvH5V5W5iamVmmwMwr5G2QW2J5g/hTe+0N My3LmaUn2/a0sLhNO0/KiyjXGYcshaYI4HMjDXdpvvXkl8sSMo2Ko9nAX q5v8u4IOJti8jGo8qwRy+7l9HT/P721xThXq5cVJVoA/9pAIetyt80oz3 1GK+tcFM/n+QzSsKWh5he2UFdDVsnF2Veob2/hksuqbUpAX5yoHpozUrg lk806IluZOfM2L4iUMP/H9+h//MOf/EAr/B6YXLDCC0yfvFQ3WQUyl1sQ w==; X-IronPort-AV: E=McAfee;i="6500,9779,10547"; a="298769783" X-IronPort-AV: E=Sophos;i="5.96,206,1665471600"; d="scan'208";a="298769783" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Nov 2022 05:48:17 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10546"; a="676825898" X-IronPort-AV: E=Sophos;i="5.96,206,1665471600"; d="scan'208";a="676825898" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga001.jf.intel.com with ESMTP; 30 Nov 2022 05:48:12 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 89D29179; Wed, 30 Nov 2022 15:48:39 +0200 (EET) From: Andy Shevchenko To: Greg Kroah-Hartman , Andy Shevchenko , Mathias Nyman , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Cc: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter , Kevin Cernekee , Mathias Nyman , Lucas De Marchi , Jani Nikula Subject: [PATCH v5 1/4] i915: Move list_count() to list.h as list_count_nodes() for broader use Date: Wed, 30 Nov 2022 15:48:35 +0200 Message-Id: <20221130134838.23805-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some of the existing users, and definitely will be new ones, want to count existing nodes in the list. Provide a generic API for that by moving code from i915 to list.h. Reviewed-by: Lucas De Marchi Acked-by: Jani Nikula Signed-off-by: Andy Shevchenko --- v5: added tag (Lucas), renamed API to list_count_nodes() (LKP) v4: fixed prototype when converting to static inline v3: added tag (Jani), changed to be static inline (Mike) v2: dropped the duplicate code in i915 (LKP) drivers/gpu/drm/i915/gt/intel_engine_cs.c | 15 ++------------- include/linux/list.h | 15 +++++++++++++++ 2 files changed, 17 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 1f7188129cd1..370164363b0d 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -2004,17 +2004,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq) } } -static unsigned long list_count(struct list_head *list) -{ - struct list_head *pos; - unsigned long count = 0; - - list_for_each(pos, list) - count++; - - return count; -} - static unsigned long read_ul(void *p, size_t x) { return *(unsigned long *)(p + x); @@ -2189,8 +2178,8 @@ void intel_engine_dump(struct intel_engine_cs *engine, spin_lock_irqsave(&engine->sched_engine->lock, flags); engine_dump_active_requests(engine, m); - drm_printf(m, "\tOn hold?: %lu\n", - list_count(&engine->sched_engine->hold)); + drm_printf(m, "\tOn hold?: %zu\n", + list_count_nodes(&engine->sched_engine->hold)); spin_unlock_irqrestore(&engine->sched_engine->lock, flags); drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base); diff --git a/include/linux/list.h b/include/linux/list.h index 61762054b4be..f10344dbad4d 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list, !list_is_head(pos, (head)); \ pos = n, n = pos->prev) +/** + * list_count_nodes - count nodes in the list + * @head: the head for your list. + */ +static inline size_t list_count_nodes(struct list_head *head) +{ + struct list_head *pos; + size_t count = 0; + + list_for_each(pos, head) + count++; + + return count; +} + /** * list_entry_is_head - test if the entry points to the head of the list * @pos: the type * to cursor