Message ID | 20230823131350.114942-28-alexandru.elisei@arm.com (mailing list archive) |
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State | New |
Headers | show
Return-Path: <owner-linux-mm@kvack.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCAC3EE4993 for <linux-mm@archiver.kernel.org>; Wed, 23 Aug 2023 13:17:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5271C28006A; Wed, 23 Aug 2023 09:17:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4D79B28005D; Wed, 23 Aug 2023 09:17:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3C69228006A; Wed, 23 Aug 2023 09:17:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 2A1AE28005D for <linux-mm@kvack.org>; Wed, 23 Aug 2023 09:17:07 -0400 (EDT) Received: from smtpin19.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 0C62E160112 for <linux-mm@kvack.org>; Wed, 23 Aug 2023 13:17:07 +0000 (UTC) X-FDA: 81155420094.19.1A35D45 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf28.hostedemail.com (Postfix) with ESMTP id 444EFC0017 for <linux-mm@kvack.org>; Wed, 23 Aug 2023 13:17:05 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf28.hostedemail.com: domain of alexandru.elisei@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=alexandru.elisei@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1692796625; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wR07bmEfdnhrLlB8kiJZfNPNesPOD1NKIT94k9iUsy8=; b=0cMtNgc7Cxx+T5jqw5tui5y5j6GzAOQ9+2fmC9CcNoaltAXMweUF5aQH0Uq8P6+t9qeVuE PqnM198btViCJE70JUSIYMqFYuvVvLle9MGQp1bVEYZZt38vFasfGsItGVjKufSRTkHFoE 0zazZmPnXhsdzJv2oDSE+LdbZctSfsY= ARC-Authentication-Results: i=1; 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[RFC,01/37] mm: page_alloc: Rename gfp_to_alloc_flags_cma -> gfp_to_alloc_flags_fast
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diff --git a/arch/arm64/kernel/mte_tag_storage.c b/arch/arm64/kernel/mte_tag_storage.c index 7dff93492a7b..1ab875be5f9b 100644 --- a/arch/arm64/kernel/mte_tag_storage.c +++ b/arch/arm64/kernel/mte_tag_storage.c @@ -398,6 +398,8 @@ static int __init mte_tag_storage_activate_regions(void) } } + ret = reserve_metadata_storage(ZERO_PAGE(0), 0, GFP_HIGHUSER_MOVABLE); + return ret; } core_initcall(mte_tag_storage_activate_regions);
On arm64, the zero page receives special treatment by having the tagged flag set on MTE initialization, not when the page is mapped in a process address space. Reserve the corresponding tag block when tag storage is being activated. Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> --- arch/arm64/kernel/mte_tag_storage.c | 2 ++ 1 file changed, 2 insertions(+)