From mboxrd@z Thu Jan 1 00:00:00 1970 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 CB95EC04E69 for ; Fri, 11 Aug 2023 00:58:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232461AbjHKA6q (ORCPT ); Thu, 10 Aug 2023 20:58:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231303AbjHKA6o (ORCPT ); Thu, 10 Aug 2023 20:58:44 -0400 Received: from mail-qv1-xf2b.google.com (mail-qv1-xf2b.google.com [IPv6:2607:f8b0:4864:20::f2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AF262706 for ; Thu, 10 Aug 2023 17:58:43 -0700 (PDT) Received: by mail-qv1-xf2b.google.com with SMTP id 6a1803df08f44-63cf9eddbc6so12933416d6.0 for ; Thu, 10 Aug 2023 17:58:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1691715522; x=1692320322; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=QUOs2rZgGkBFFSdaCrQAmAwIIFAJLWjtOt57qeU+xpk=; b=bWO5Ub9RI9saPBfTCrM4APPk2LtmNtuAV6RiDOnMARB61Hxkw/Un9TVs2diTw111yH cBn1I0riUBRZp+SFQSxGss1HLm223XhTPPpjhwZabbAqelNpo2c+lX0N3vOzyOzL5k4L +9E6U7aFGubdsEUn7iPB4PvlMMQy+cW+R9oNjgjQ/fmQxu/gRu9/LsMJLIemqrZN7Vpu vwlN7j8TPj5rw730n0oeP9uMve/D1SsalCy7o/ro79A8gNEB0KeIEAsLu2JKKunpbMvz Jy3an6fSEHEO02ndLoudxLJ998yR0/pQARxjog0UmtdjqvJgnmp/VRtpBZIKUrqdU6Y0 qScQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691715522; x=1692320322; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=QUOs2rZgGkBFFSdaCrQAmAwIIFAJLWjtOt57qeU+xpk=; b=RMpZRFmJxVxjMOfVecNY52O2qv41qpSo+fyHnOwIItWY7TPT0J4AlQO17EV/lVPbDr 2+xTEUb/4eMm2FHu140ubQ8gGE+MaU1BvcKhgZsgftJekdAV8pC8CkSiifIel2VEzSyj jHBs+I9qcheWD7sa+BwiHwCnUVg0NJkH+ToEH0orQlKD0YfZ4Q6uAALLhO8rbwb8wv2c 6LzgObkEX1iwuWZnSX9AlRln3h9dvdSljcr0UuK9KxzzY1znoTvRXddOTgpQiBTLBRCC CHuHafB1XSlsjJiEf0++95Qq06n6sBEPqv8v76TDoaSUSK7XPqo15V1AKKg1xRXebGo0 PoHA== X-Gm-Message-State: AOJu0Yzgn1eGCcb/MA1cKlJnt5gmblhbQkL2j46qsFvbNqW5LmgvNlsS AErDPkmVHOgwkHqp1teYjUXpcjwixYw= X-Google-Smtp-Source: AGHT+IFwzePF9Hugza7YLya59EIfvbmLwmBeBw36pmXWWz+kHpGJ1cWfBl7a6dB6gpCs+wBeTvqdrQ== X-Received: by 2002:a05:6214:492:b0:635:f546:83d0 with SMTP id pt18-20020a056214049200b00635f54683d0mr4384813qvb.11.1691715522210; Thu, 10 Aug 2023 17:58:42 -0700 (PDT) Received: from localhost (2603-7080-3d03-3cb9-317d-7087-0f3e-bab3.res6.spectrum.com. [2603:7080:3d03:3cb9:317d:7087:f3e:bab3]) by smtp.gmail.com with ESMTPSA id h14-20020a0cf44e000000b0063d38e52c8fsm871376qvm.18.2023.08.10.17.58.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Aug 2023 17:58:41 -0700 (PDT) From: Yury Norov To: linux-kernel@vger.kernel.org, Andy Shevchenko , Rasmus Villemoes Cc: Yury Norov Subject: [PATCH v2 4/6] bitmap: replace _reg_op(REG_OP_ISFREE) with find_next_bit() Date: Thu, 10 Aug 2023 17:57:30 -0700 Message-Id: <20230811005732.107718-5-yury.norov@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230811005732.107718-1-yury.norov@gmail.com> References: <20230811005732.107718-1-yury.norov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org _reg_op(REG_OP_ISFREE) can be trivially replaced with find_next_bit(). Doing that opens room for potential small_const_nbits() optimization. Signed-off-by: Yury Norov --- lib/bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/bitmap.c b/lib/bitmap.c index 0ffafc41cd56..d4560acbe077 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -1354,7 +1354,7 @@ int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order) { unsigned int nbits = pos + BIT(order); - if (!__reg_op(bitmap, pos, order, REG_OP_ISFREE)) + if (find_next_bit(bitmap, pos, nbits) < nbits) return -EBUSY; bitmap_set(bitmap, pos, nbits); return 0; -- 2.39.2