From nobody Tue Dec 16 16:37:09 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 E3A0FC77B73 for ; Mon, 24 Apr 2023 18:31:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231325AbjDXSb4 (ORCPT ); Mon, 24 Apr 2023 14:31:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229929AbjDXSbx (ORCPT ); Mon, 24 Apr 2023 14:31:53 -0400 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [IPv6:2a00:1450:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1A435FE8; Mon, 24 Apr 2023 11:31:52 -0700 (PDT) Received: by mail-ej1-x632.google.com with SMTP id a640c23a62f3a-956ff2399b1so799304366b.3; Mon, 24 Apr 2023 11:31:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682361111; x=1684953111; 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=ILj5Yfya6TYia4X1kcF5IY0zYmEccgx71qEaQqZW73E=; b=cDQK//4yKjOcmJF10KvVjlntkOlNeF0Exw/0Hdko0HMO9VnjrbLIBJdyAbhgnZ2aQp Dnec1x13cKW7Q27Rs+X3v3MxmodonbnEYREtwjrBESdCEFA3dEfBX9E5AZPSjiuO20zR C4CAvqWZAOLqmd1rBDISznkvn9bJaEBnx9owWD9s/1GuQqezNY/5LJc4Y7i+WrzHTWmp MDzZpzp/0JbF0lboimouAOYvIOr7U/vNXEVgwSAzwmqCFmuoF9UcUFFD1FLrLItWNgT6 nXVSWTkkiGBJWEY28DncYLTldNm/Msf1DL13AHn9TSKCRLknZ9J4ol4hjIDrPLQzi47R 5CwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682361111; x=1684953111; 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=ILj5Yfya6TYia4X1kcF5IY0zYmEccgx71qEaQqZW73E=; b=Gp8BRsOvBhc8j0dwqhQIf8Ce2gJNjUAjjcyvTQLCK5K2DJbUOH3yQnuTcq/2HKFfDp AKTE/b0CvbQTSNbL6ejLwNQC6E8bFYpQB9Dvlcdsj21S0lkb442sWb9cZ2fxmVBZjJ/G t/pmNeuIly5Nu2RF3irRdLMdZ8/Jw0K92eB+zcaTr2LS1wC71T8SBSGjbwk5sYyVUa8T g7kNPYLUpyiXu+g6loYIUx598HjRZgNThDqQXxuU1HzHaqaUJ4Q0DH4s/V1QLirvbKxh ifB2CLrS4Df4P9m9E3Y/W2Q5C8d2P9LysyxkJ05vW7VJn4QFzWBomH+2tmdiypIFJ3gs 1Sfw== X-Gm-Message-State: AAQBX9cfHfX+jpBXM48C+vMOulQV8f6/r3740xfKwjhjp6enl9bwA627 hvVS8sioDwy6hDxnNXNC4tOoaoP9EfE= X-Google-Smtp-Source: AKy350beBPnYSLiXozvvSsvWrThlQEzRoM4DzrrCgCtGwBlgqxNMuCHABROekZzgewl9P9yOoYjdiA== X-Received: by 2002:a17:906:49da:b0:94e:8556:f01c with SMTP id w26-20020a17090649da00b0094e8556f01cmr9863662ejv.57.1682361110779; Mon, 24 Apr 2023 11:31:50 -0700 (PDT) Received: from noahgold-desk.intel.com ([2600:1010:b0bf:49f9:6122:25ea:f378:f48b]) by smtp.gmail.com with ESMTPSA id f14-20020a1709062c4e00b009582c49acdasm3244915ejh.47.2023.04.24.11.31.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Apr 2023 11:31:50 -0700 (PDT) From: Noah Goldstein To: linux-ext4@vger.kernel.org Cc: goldstein.w.n@gmail.com, tytso@mit.edu, adilger.kernel@dilger.ca, linux-kernel@vger.kernel.org, Jan Kara Subject: [PATCH v2] ext4: move `ext4_count_free` to ext4.h so it can be easily inlined Date: Mon, 24 Apr 2023 13:31:41 -0500 Message-Id: <20230424183141.2005976-1-goldstein.w.n@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230421014750.2315938-1-goldstein.w.n@gmail.com> References: <20230421014750.2315938-1-goldstein.w.n@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" `ext4_count_free` is a one-line helper that is clearly better off being inlined. This saves a handful instructions in `vmlinux` on x86. Instruction estimates use `wc -l` on `objdump` Before: 8539271 After : 8539248 So saves roughly 20 instructions Signed-off-by: Noah Goldstein Reviewed-by: Jan Kara --- fs/ext4/bitmap.c | 5 ----- fs/ext4/ext4.h | 6 +++++- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c index f63e028c638c..c3cd2b878bbd 100644 --- a/fs/ext4/bitmap.c +++ b/fs/ext4/bitmap.c @@ -11,11 +11,6 @@ #include #include "ext4.h" =20 -unsigned int ext4_count_free(char *bitmap, unsigned int numchars) -{ - return numchars * BITS_PER_BYTE - memweight(bitmap, numchars); -} - int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t gro= up, struct ext4_group_desc *gdp, struct buffer_head *bh, int sz) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 08b29c289da4..6e1d3c175a70 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2675,7 +2675,11 @@ struct mmpd_data { # define NORET_AND noreturn, =20 /* bitmap.c */ -extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); +static inline unsigned int ext4_count_free(char *bitmap, unsigned int numc= hars) +{ + return numchars * BITS_PER_BYTE - memweight(bitmap, numchars); +} + void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, struct ext4_group_desc *gdp, struct buffer_head *bh, int sz); --=20 2.34.1