From nobody Thu Dec 18 07:57:11 2025 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 150E1C04FE2 for ; Tue, 15 Aug 2023 23:37:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240665AbjHOXhM (ORCPT ); Tue, 15 Aug 2023 19:37:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240625AbjHOXgy (ORCPT ); Tue, 15 Aug 2023 19:36:54 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8D5613E for ; Tue, 15 Aug 2023 16:36:52 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6887059f121so725774b3a.3 for ; Tue, 15 Aug 2023 16:36:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692142612; x=1692747412; 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=SiYOATL4Yt0CXg+oEOLFMOCykgPiyRQW/lZP421Tl8g=; b=oyAmxVZ1Vfx8ISf3Ltk9F9p2m4nKztfLvmNcmi5JJfPy3lBwel5j8bD8e8bJg7wlDm ob91Eh8fK9lcs7DPYRuDODy4O7di3Cgxj038h67hePvpRDttH9ZLtSYMaszMa00YEEM4 Yb1657fmOqvlQ4Eot9UDUZkUffLewAsXXlNKQZ7FwuCFFGZSK4aTaU2D2TkkPXG3a3GW HtSjCFWvGmradvjPXRk+JMTNHJGQdKJh46rGoV1NZPKnjcE4a37IAryZmtTj3IDCsMYH m27C7Zl2vtOiTvDc9WbGvT4U0Qm9pWfnevpG1OwTTspJZ5KSL7hXZVZ97dme0vnCE0ZF U1Xw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692142612; x=1692747412; 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=SiYOATL4Yt0CXg+oEOLFMOCykgPiyRQW/lZP421Tl8g=; b=dLKO7aqvcxIm0OOD7m6TtSkIxHB5MdWZsu2qya6JzFfa0K5PkI5C9uKKr+421eWIja BUWKQ1ZXqik2tiVTh9jUnv5qcLWDreiJCe3BHAvhL92EbWb33HuhJ7DYhBbOsEuN7sij IzKwVcuzfJq4709epHI+f3ypPwiqKEXGPDp0aJF8CPtXa3550gs0yIVm8no68NbwXoRK tmKefKLwTeVMLm8DsGh/6rVJLRNLzbEyugLgOWinUsVaYpuxpK4cAye23do38yU8Q42+ aewjjIGiST9tpvmhXdUK1F3RVZU6A7UsYDu/Cv3RFPVEM9C4+xPjn30rxwmFdC5zAKSL ADNQ== X-Gm-Message-State: AOJu0YzKw5b3gOONtwQTJfYL06xuI3jaHikjKe8P+LIHi+Q1B6Yfv1uv CCv23hv36+ihdLF0TUcs6weOdydmDIM= X-Google-Smtp-Source: AGHT+IGw3e3HBJ3B2RxSt5fec/v+xG1BnUI9IMBKv0mv9x9Q79spXvimRIHSZd70+JUCn0raG+6trQ== X-Received: by 2002:a05:6a00:1393:b0:668:69fa:f791 with SMTP id t19-20020a056a00139300b0066869faf791mr279325pfg.3.1692142611977; Tue, 15 Aug 2023 16:36:51 -0700 (PDT) Received: from localhost ([216.228.127.130]) by smtp.gmail.com with ESMTPSA id u18-20020aa78492000000b00673e652985bsm9823073pfn.118.2023.08.15.16.36.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Aug 2023 16:36:51 -0700 (PDT) From: Yury Norov To: linux-kernel@vger.kernel.org, Andy Shevchenko , Rasmus Villemoes Cc: Yury Norov Subject: [PATCH v3 6/8] bitmap: replace _reg_op(REG_OP_ISFREE) with find_next_bit() Date: Tue, 15 Aug 2023 16:36:26 -0700 Message-Id: <20230815233628.45016-7-yury.norov@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230815233628.45016-1-yury.norov@gmail.com> References: <20230815233628.45016-1-yury.norov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" _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 2898ec2bdef1..c29140e27d20 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -1356,7 +1356,7 @@ int bitmap_allocate_region(unsigned long *bitmap, uns= igned int pos, int order) { unsigned int len =3D BIT(order); =20 - if (!__reg_op(bitmap, pos, order, REG_OP_ISFREE)) + if (find_next_bit(bitmap, pos + len, pos) < pos + len) return -EBUSY; bitmap_set(bitmap, pos, len); return 0; --=20 2.39.2