From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-174.mta0.migadu.com (out-174.mta0.migadu.com [91.218.175.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A7EB4315A for ; Mon, 22 Dec 2025 03:01:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766372462; cv=none; b=rkTmdAXcviNgQxMfIoaPJ8Ia+RKZNapRjue6RHkwDyKsnz/9/c/EH68MF3nO/ZgPJ8MGN/AxwOXVMrslZn92bw5mmf18o9tEU3XXOgYvNshs3lB7UYWcCJtdGxnrIu3czxlfyifRnC3XPi4dHXku0xyR0Jp82qrCMDLb/0RQmjc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766372462; c=relaxed/simple; bh=tz6WBPbMsCl3k+S3Jc2NovD1ezIMKzUfTdTk78TVn9U=; h=Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc: Message-Id:References:To; b=U2iDICY1WNUEf9gsBWCEPovUPoiB2qiw50zm7+WruBgItbo0eioadzuhfVBa2LA78QqUBfyuvupfhL04q7fPbukzO4uJSwO2IGGWU5hlDMkuhRZrSRhRfbyKsVL9GguEOClNMCAnUv+yL9U1mVIaPbH5RaHwJVZUBlCmd9/7YfY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=vxbPEKyu; arc=none smtp.client-ip=91.218.175.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="vxbPEKyu" Content-Type: text/plain; charset=us-ascii DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1766372444; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YSeHczoqP12Y8AVomaqptrBKs4j+Qk5o6drkuI0H/pg=; b=vxbPEKyuOY5d8vxLynCKQE55Fcn0Urid3Ha7WmyBAGR/dOPhxVv+AMF4ezxsZMOmalwc44 /n6ZUGcVuW7St/bI9SobajzvxsZJzqyJ6TriQHiDuVDb/FUilFDCoxsI29GAG8R1EbT4+d CKLliPY55UW8YFdhTdeqBVlHHqeCiQc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.200.81.1.6\)) Subject: Re: [PATCHv2 04/14] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info' X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Muchun Song In-Reply-To: <20251218150949.721480-5-kas@kernel.org> Date: Mon, 22 Dec 2025 11:00:00 +0800 Cc: Andrew Morton , David Hildenbrand , Matthew Wilcox , Usama Arif , Frank van der Linden , Oscar Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Zi Yan , Baoquan He , Michal Hocko , Johannes Weiner , Jonathan Corbet , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Content-Transfer-Encoding: 7bit Message-Id: <98BDC08B-9A77-44BE-8BBD-FF9F8E4A6DF4@linux.dev> References: <20251218150949.721480-1-kas@kernel.org> <20251218150949.721480-5-kas@kernel.org> To: Kiryl Shutsemau X-Migadu-Flow: FLOW_OUT > On Dec 18, 2025, at 23:09, Kiryl Shutsemau wrote: > > The 'compound_head' field in the 'struct page' encodes whether the page > is a tail and where to locate the head page. Bit 0 is set if the page is > a tail, and the remaining bits in the field point to the head page. > > As preparation for changing how the field encodes information about the > head page, rename the field to 'compound_info'. > > Signed-off-by: Kiryl Shutsemau Reviewed-by: Muchun Song Thanks.