From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.222 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793626159; b=fGh61kRd3XJkQGlknAG83UuMwnYEW6qr2ahLzscWWjH4DCWhVPNnlTWqAp5Ex2Rw3XEG oyK8KIFHE08UCEchkcki5gw+SdREmjlLTihCakGpJT9+OsGXvyCsA5VG6uNHpYHQMwWFM 5B4tIcDgf+IZy1aAszfMTCpO1bRaLYCIXg8vi9tpkJLzJ+DepK4JrvbIKcbSsoERfxGKE LS5xXMigGhNr8959Zwdhiap/6MdC10d+brMWkSg4m/TOBY8JXjTRWMFLS/lCF421mF2iT QkWv5E33Wa1oTQvUmgC8uR5EjfNFC0zXCNCVCCLb/Xk4ebf6/13KE4UurlEj3+RHJQg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793626159; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-Id: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=OHnx1MWHnNS05Fb0GSs5HhOjNANQI9agb14wDojH6MY=; b=uXaA3kapvttl2tXjnfgqvZSJibpXC6z2Vv+ym83ceVEt/Cf2A7jM6whj2KT5L9CGaFkt lnQlvOPkd86UG08G0bwR4Vr3DFYDxADqIbBXLr3uTra3vpzD0+JZf85iNnC9EtsmkWmrw YTuRTYPuSVpn49I6dD60uAFkzhlrhAMiN2o7aS9tNh/uhD6s4kMVkduPy7Ql9dD+t849b rHvkEck7qkLdc/gp8euSyGw8Hvs2YmeK7swPA1QhCLuBMaAMN2zQKVemldFVeOi430s7b ytNHUK4c1f4UfyANN7ylschaBgJI1M8iI+iBpxYEGPO0FoMPbYE+JH+teykpiHu/00Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=WnbDgX2C; arc=none smtp.remote-ip=91.218.175.222 Received: from mta0.migadu.com (out-222.mta0.migadu.com [91.218.175.222]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D1EC606A330 for ; Mon, 2 Nov 2026 13:29:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 6D1EC606A330 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, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=WnbDgX2C X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=KyHJ47bSIgeXP+kKXIy59s7ywWqOI47F3ePHg/aPldo=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793626156; v=1; x=1794230956; b=WnbDgX2CJal+tGHK4IOZRa3i/XR/cZoUYAE/mf4c/TpsYnoIPm3AAvAsWKRYO4EJ/p6eXQcG eGk9Wsyp2sHcipSCom5x9DApbq/7+YBKdIkZ8ujC2zmuwUviebf8RydVTdBVBQCkosdqXFm8+d3 1MGaysJVBw2Sqb0nmrTuhjpo= X-Envelope-To: linux-kernel@vger.kernel.org Received: by mta10.migadu.com with ESMTPS id 02021b5d7b6d5952; Mon, 02 Nov 2026 13:29:16 +0000 X-Mizu-Trace-ID: 02021b5d7b6d5952 X-Migadu-Flow: FLOW_OUT From: xu.xin@linux.dev To: xu.xin@linux.dev Cc: acme@kernel.org, adrian.hunter@intel.com, agordeev@linux.ibm.com, akpm@linux-foundation.org, alexander.shishkin@linux.intel.com, apopple@nvidia.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, borntraeger@linux.ibm.com, byungchul@sk.com, chengming.zhou@linux.dev, david@kernel.org, dev.jain@arm.com, gerald.schaefer@linux.ibm.com, gor@linux.ibm.com, gourry@gourry.net, harry@kernel.org, hca@linux.ibm.com, irogers@google.com, james.clark@linaro.org, jannh@google.com, jolsa@kernel.org, joshua.hahnjy@gmail.com, kas@kernel.org, lance.yang@linux.dev, liam@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, ljs@kernel.org, mark.rutland@arm.com, matthew.brost@intel.com, mhiramat@kernel.org, mhocko@suse.com, mingo@redhat.com, namhyung@kernel.org, nico.pache@linux.dev, oleg@redhat.com, peterz@infradead.org, riel@surriel.com, rppt@kernel.org, ryan.roberts@arm.com, surenb@google.com, svens@linux.ibm.com, usama.arif@linux.dev, vbabka@kernel.org, ying.huang@linux.alibaba.com, ziy@nvidia.com, xialonglong2025@163.com Subject: [PATCH v2 1/4] mm/pagewalk: delete the unused member Date: Mon, 2 Nov 2026 21:28:44 +0800 Message-Id: <20261102132844.301730-1-xu.xin@linux.dev> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261102132416.300084-1-xu.xin@linux.dev> References: <20261102132416.300084-1-xu.xin@linux.dev> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Xu Xin The 'vma' member of struct folio_walk has never been used since it was introduced by commit aa39ca6940f1a ("mm/pagewalk: introduce folio_walk_start() + folio_walk_end()"). The VMA is always passed to folio_walk_start() as a separate argument, and neither folio_walk_start() nor folio_walk_end() ever reads or writes fw->vma. I audited all the current users of struct folio_walk (the callers of folio_walk_start()) and none of them assign to or read the member, so it is safe to remove. Signed-off-by: Xu Xin --- include/linux/pagewalk.h | 1 - 1 file changed, 1 deletion(-) diff --git a/include/linux/pagewalk.h b/include/linux/pagewalk.h index b41d7265c01b..1c397be0d092 100644 --- a/include/linux/pagewalk.h +++ b/include/linux/pagewalk.h @@ -183,7 +183,6 @@ struct folio_walk { pmd_t pmd; }; /* private */ - struct vm_area_struct *vma; spinlock_t *ptl; }; -- 2.34.1