From patchwork Mon Sep 12 11:46:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 9326251 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9AD9B6048B for ; Mon, 12 Sep 2016 11:46:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8CB8F28D30 for ; Mon, 12 Sep 2016 11:46:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8156428D37; Mon, 12 Sep 2016 11:46:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 709CE28D30 for ; Mon, 12 Sep 2016 11:46:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4CF9E6E0FE; Mon, 12 Sep 2016 11:46:50 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from pegasos-out.vodafone.de (pegasos-out.vodafone.de [80.84.1.38]) by gabe.freedesktop.org (Postfix) with ESMTP id C90316E0FE for ; Mon, 12 Sep 2016 11:46:49 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by pegasos-out.vodafone.de (Rohrpostix2 Daemon) with ESMTP id E16DA5E4D60; Mon, 12 Sep 2016 13:46:48 +0200 (CEST) X-Virus-Scanned: amavisd-new at vodafone.de Authentication-Results: rohrpostix2.prod.vfnet.de (amavisd-new); dkim=pass header.i=@vodafone.de Received: from pegasos-out.vodafone.de ([127.0.0.1]) by localhost (rohrpostix2.prod.vfnet.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XGEtk+CfA5hv; Mon, 12 Sep 2016 13:46:47 +0200 (CEST) Received: from smtp-04.vodafone.de (smtp-04.vodafone.de [10.215.254.39]) by pegasos-out.vodafone.de (Rohrpostix2 Daemon) with ESMTP id F40045E4D4A; Mon, 12 Sep 2016 13:46:46 +0200 (CEST) X-DKIM: OpenDKIM Filter v2.6.8 pegasos-out.vodafone.de F40045E4D4A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vodafone.de; s=mail; t=1473680807; bh=gWe+PJuio6icO19cnUj2fFiJAcsc+fTl9xOYrHbEmz0=; h=From:To:Cc:Subject:Date; b=A6osMNnHRGiry6yYK2zDW281eoy/cX99JpHLxNONt9ueLW56qHZQvdlAlVpSPIPMb RGaeWNMMmxKbUUQKee9TNNg0ZOQUeX/iCMNZVKh4ZJdnmrXB8Ofrmk5W8BJGcFePoG ODe6PojmNrALeO0jKsiQNGUy0HypRNpoMzwHpG0Y= X-Virus-Scanned: amavisd-new at vodafone.de Received: from smtp-04.vodafone.de ([127.0.0.1]) by localhost (xsmail-dmz8.prod.vfnet.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id N5sRFQ2g5FDN; Mon, 12 Sep 2016 13:46:44 +0200 (CEST) From: =?UTF-8?q?Christian=20K=C3=B6nig?= To: dri-devel@lists.freedesktop.org Subject: [PATCH 1/4] drm/ttm: use ffs in ttm_mem_type_from_place Date: Mon, 12 Sep 2016 13:46:41 +0200 Message-Id: <1473680804-23037-1-git-send-email-deathsimple@vodafone.de> X-Mailer: git-send-email 2.5.0 MIME-Version: 1.0 Cc: Alexander.Deucher@amd.com, flora.cui@amd.com, emil.l.velikov@gmail.com, Hawking.Zhang@amd.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Christian König A bit pointless to search for the first bit set manually. Signed-off-by: Christian König --- drivers/gpu/drm/ttm/ttm_bo.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index bc37f02..531cc97 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -57,14 +57,14 @@ static struct attribute ttm_bo_count = { static inline int ttm_mem_type_from_place(const struct ttm_place *place, uint32_t *mem_type) { - int i; + int pos; - for (i = 0; i <= TTM_PL_PRIV5; i++) - if (place->flags & (1 << i)) { - *mem_type = i; - return 0; - } - return -EINVAL; + pos = ffs(place->flags & TTM_PL_MASK_MEM); + if (unlikely(!pos)) + return -EINVAL; + + *mem_type = pos - 1; + return 0; } static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)