From nobody Mon May 6 10:44:57 2024 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 ED8D9C77B7A for ; Sat, 3 Jun 2023 02:31:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237001AbjFCCba (ORCPT ); Fri, 2 Jun 2023 22:31:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229617AbjFCCb2 (ORCPT ); Fri, 2 Jun 2023 22:31:28 -0400 Received: from mail-qk1-x72a.google.com (mail-qk1-x72a.google.com [IPv6:2607:f8b0:4864:20::72a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 204C9E41 for ; Fri, 2 Jun 2023 19:31:28 -0700 (PDT) Received: by mail-qk1-x72a.google.com with SMTP id af79cd13be357-75b04e897a5so309791485a.2 for ; Fri, 02 Jun 2023 19:31:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685759487; x=1688351487; h=cc:to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=pW1rdqqbkEtPfg32gPMaFYxqvJDDH52eSLMUxtdjdeA=; b=H4HacM23qksu9BnchKnhSbcxJI8fYuoGcOOrjtWGl0q6/72VzVLfqRjpaVOGjnPQPJ QSbWFwVbR++PqWMvbDwWq0CLAm9VUpYiZPb3ltJsJtngZCGhwefGP82AFOrmacQdCWVN bvbw8w3+udaH5c+tE5m/06sSPlVBLwaVlQgLnJquvve9jGs9GYkGtE4JjiNBE5v7a4W4 6T7gVTd8YHJoCNC9rM+1GzBTa67xSgvNNZAm3KzMAzPK1ZhzvFmLiw9vGCgtfTyGFGR7 5/GJ/nYaGKhwOoVQXdz0c2/KwfMsFMCbZeSenspA8l5rnPQkyxzTWQLQ478IrswHH1N5 IiKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685759487; x=1688351487; h=cc:to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=pW1rdqqbkEtPfg32gPMaFYxqvJDDH52eSLMUxtdjdeA=; b=FtCynI3+2H977pEOijWRkWLHC0CLeh9ojtM5CPdvJuR6xD3tXywhcpJ4gGaFlB9y7u xUjNzBWvDCNei5B7ZLWxFNAoCbMW6rGqb4qO4a6FdONjOWsnczeiDrRyvtt3ZdwexdMf UKpVBC4uLWGHOKCaHu/8oQp1f7agzooQUNt+hKHa8rsAf/sERtMBwnsOnsT8duXEtULz oMxa1IAm0f5jjydenrxBHKxK8oz+myUeQdmjs3SZ6+GX59VPWmST+UJYjpxzz9b0E0L/ Ll8+ZL1BRXne8+633AXJwkXPAikczjjlcbR3jExmqC1j3gBhmFg4waaovOa5cKTLIoWm o5eg== X-Gm-Message-State: AC+VfDywWR5F8lu/Xf1myWiWuim+W6gkm0yJnWQvDED4z3krgj4aMvrX /xnwXkMyGrhROH6v0ZTcRIT1Jn8OLNZEOtiSU7S3xDr7SgE= X-Google-Smtp-Source: ACHHUZ4CFazECbW1+uvM4ZkwvzK4e+C7zW/jZxxm1NMGAOGWazDOIC9LapzKqLGSfBc/j017YHi1X7KXLeX+XI1ik88= X-Received: by 2002:a05:620a:1a24:b0:75b:23a1:3625 with SMTP id bk36-20020a05620a1a2400b0075b23a13625mr17612753qkb.54.1685759487100; Fri, 02 Jun 2023 19:31:27 -0700 (PDT) MIME-Version: 1.0 From: Liam Ni Date: Sat, 3 Jun 2023 10:31:16 +0800 Message-ID: Subject: [PATCH] mm:Improve the execution efficiency of early_ioremap_setup() To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Reduce the number of invalid loops of the function early_ioremap_setup() to improve the efficiency of function execution Signed-off-by: LiamNi --- mm/early_ioremap.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c index 9bc12e526ed0..ce06b2884789 100644 --- a/mm/early_ioremap.c +++ b/mm/early_ioremap.c @@ -72,12 +72,10 @@ void __init early_ioremap_setup(void) { int i; - for (i =3D 0; i < FIX_BTMAPS_SLOTS; i++) - if (WARN_ON(prev_map[i])) - break; - - for (i =3D 0; i < FIX_BTMAPS_SLOTS; i++) + for (i =3D 0; i < FIX_BTMAPS_SLOTS; i++) { + WARN_ON_ONCE(prev_map[i]); slot_virt[i] =3D __fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i); + } } static int __init check_early_ioremap_leak(void) --=20 2.25.1