From nobody Mon Feb 9 16:45:37 2026 Received: from mx10.didiglobal.com (mx10.didiglobal.com [111.202.70.125]) by smtp.subspace.kernel.org (Postfix) with SMTP id 2BDC325FA24; Mon, 21 Apr 2025 10:51:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=111.202.70.125 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745232665; cv=none; b=Gfah5qB+W8I5XvM1krngFG7a/LtbkJhZ8Y5oJ1EkS1MdbD11ywcuJ0Mr1ioEzqfJL5EVc7LZ2i2XvXteNw8Cr9VhXDqVJ+PayWhcjdJMv4dfnuh6TRIVfSVGfRGhzxUAA4SMTPQO7s0Xk7H2I5zVWxdwsPeG46XHr1850QhEDAY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745232665; c=relaxed/simple; bh=isUkKjuOetSgNBjU8SvHHjmefzbAw+3LH02RLvwAink=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:Content-Type: MIME-Version; b=slLLSI4s0QyBny6/Yt4FH0l6Rzfi233nFib5DMkzaqS+s9MqZ34zBzH2ROQ9ETQ2xwSoJNsXR2aX2QJ8eyv+9F3428JoSHhQH9SZV6EpmAF+BCqUrP8aK+CDczYMSTx6yWqd3zdbk+M0c/FhVvLbjVuSQ/mF4z1eQ/58C4BvRYs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=didiglobal.com; spf=pass smtp.mailfrom=didiglobal.com; dkim=pass (1024-bit key) header.d=didiglobal.com header.i=@didiglobal.com header.b=euyvweeH; arc=none smtp.client-ip=111.202.70.125 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=didiglobal.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=didiglobal.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=didiglobal.com header.i=@didiglobal.com header.b="euyvweeH" Received: from mail.didiglobal.com (unknown [10.79.64.21]) by mx10.didiglobal.com (MailData Gateway V2.8.8) with ESMTPS id A5C82192BB6580; Mon, 21 Apr 2025 18:49:57 +0800 (CST) Received: from BJ02-ACTMBX-09.didichuxing.com (10.79.65.18) by BJ01-ACTMBX-02.didichuxing.com (10.79.64.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Mon, 21 Apr 2025 18:50:30 +0800 Received: from BJ03-ACTMBX-07.didichuxing.com (10.79.71.34) by BJ02-ACTMBX-09.didichuxing.com (10.79.65.18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Mon, 21 Apr 2025 18:50:30 +0800 Received: from BJ03-ACTMBX-07.didichuxing.com ([fe80::b00b:de35:2067:9787]) by BJ03-ACTMBX-07.didichuxing.com ([fe80::b00b:de35:2067:9787%7]) with mapi id 15.02.1748.010; Mon, 21 Apr 2025 18:50:30 +0800 X-MD-Sfrom: chentaotao@didiglobal.com X-MD-SrcIP: 10.79.64.21 From: =?gb2312?B?s8LMzszOIFRhb3RhbyBDaGVu?= To: "tytso@mit.edu" , "adilger.kernel@dilger.ca" , "akpm@linux-foundation.org" , "willy@infradead.org" CC: "linux-ext4@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , =?gb2312?B?s8LMzszOIFRhb3RhbyBDaGVu?= Subject: [PATCH 1/3] mm/filemap: initialize fsdata with iocb->ki_flags Thread-Topic: [PATCH 1/3] mm/filemap: initialize fsdata with iocb->ki_flags Thread-Index: AQHbsqsyd5FrrvlD8E+DF/FkAUZ8QA== Date: Mon, 21 Apr 2025 10:50:30 +0000 Message-ID: <20250421105026.19577-2-chentaotao@didiglobal.com> In-Reply-To: <20250421105026.19577-1-chentaotao@didiglobal.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=didiglobal.com; s=2025; t=1745232621; bh=isUkKjuOetSgNBjU8SvHHjmefzbAw+3LH02RLvwAink=; h=From:To:CC:Subject:Date:Message-ID:Content-Type; b=euyvweeH+54Ovq55HqloJTd+oAulTzSJogLds7Yk+cNBKH96Z1JU1w3HiDgeHAVz7 e2BlBzS1OD4NQLw6s9icgGeucKjzhUeN7dVJxYLWP1MntG9V6oIPyXVOUPbR3GcISj sWVUOdVHX9jyIFEnWC5mbxOep24arDbv4qCN+uaY= Content-Type: text/plain; charset="utf-8" From: Taotao Chen Initialize fsdata with &iocb->ki_flags to allow filesystems to check iocb flags like IOCB_DONTCACHE during ->write_begin(). Signed-off-by: Taotao Chen --- mm/filemap.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/filemap.c b/mm/filemap.c index 7b90cbeb4a1a..9174b6310f0b 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -4087,7 +4087,11 @@ ssize_t generic_perform_write(struct kiocb *iocb, st= ruct iov_iter *i) size_t offset; /* Offset into folio */ size_t bytes; /* Bytes to write to folio */ size_t copied; /* Bytes copied from user */ - void *fsdata =3D NULL; + /* + * Initialize fsdata with iocb flags pointer so that filesystems + * can check ki_flags (like IOCB_DONTCACHE) in write operations. + */ + void *fsdata =3D &iocb->ki_flags; =20 bytes =3D iov_iter_count(i); retry: --=20 2.34.1