From patchwork Thu Dec 30 19:14:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: andrey.konovalov@linux.dev X-Patchwork-Id: 12701691 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6D85EC433F5 for ; Thu, 30 Dec 2021 19:39:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ijXjVeU4K5UlaTWnoZ7jaEaysZZzv65sE4TEnwc076I=; b=i8ZQR3DWhxO6ne tC41h9UUBhyJDwxin5k8nP0VP8Mw+VX6bH5/5ynfXa7Trepwgo4j30AK1DxOdf2c/P7UBpf/5cPKh GpgoQ0tnUJQEAJLuMrQpNa8G6l2ujsbZR3exf282nW4hdHS2dDdVNcw5lXSXDonCtCnj/XHtR9UXp MDQRp/hPBKRtpk1IyNfk63ZnKJWMMlYbMx8v5QHERFZTCRbuoLBdRb04KPVA4v6e+lWTuVZlmc2ZA nl+GzstkFOu51reIqnXLX2d3F3unZGICnbj1tE1dn1YlABBgWdr+lW40V0/MV9qopF94WreRwzQiX 5oO/mgj7f2JCfBpdsvwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n31Fn-0055QP-E0; Thu, 30 Dec 2021 19:38:23 +0000 Received: from out2.migadu.com ([2001:41d0:2:aacc::]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n30uT-004vbf-Ep for linux-arm-kernel@lists.infradead.org; Thu, 30 Dec 2021 19:16:23 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1640891780; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=woHyASpRd1dsSk1k8aXjCDxvW5sGTzgveGosFVStA8I=; b=HQhqX9Oud/jvsmb43MVN2YW7rCLd1QpP6q2PAW6Wqd+vSm5iI37er7Q2R6+JPN9o2plHUB YxJ7b3hFAFyTTzHCalLMBoYz/4CVMT+Ex++BMAJxDakHXnU0pAss2JJFLYTofTWhB/qxnD gNArO6Wr/9Rw2WMNAkoXG3S5OYyD7bw= From: andrey.konovalov@linux.dev To: Andrew Morton Cc: Andrey Konovalov , Marco Elver , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, linux-mm@kvack.org, Vincenzo Frascino , Catalin Marinas , Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Peter Collingbourne , Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH mm v5 33/39] kasan: mark kasan_arg_stacktrace as __initdata Date: Thu, 30 Dec 2021 20:14:58 +0100 Message-Id: <4ee96e054d59a2c65dace818cfa2c2e2bd1cb2ee.1640891329.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211230_111621_713063_3154B5C5 X-CRM114-Status: GOOD ( 11.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Andrey Konovalov As kasan_arg_stacktrace is only used in __init functions, mark it as __initdata instead of __ro_after_init to allow it be freed after boot. The other enums for KASAN args are used in kasan_init_hw_tags_cpu(), which is not marked as __init as a CPU can be hot-plugged after boot. Clarify this in a comment. Signed-off-by: Andrey Konovalov Suggested-by: Marco Elver --- Changes v1->v2: - Add this patch. --- mm/kasan/hw_tags.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index 2e9378a4f07f..6509809dd5d8 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -40,7 +40,7 @@ enum kasan_arg_stacktrace { static enum kasan_arg kasan_arg __ro_after_init; static enum kasan_arg_mode kasan_arg_mode __ro_after_init; -static enum kasan_arg_stacktrace kasan_arg_stacktrace __ro_after_init; +static enum kasan_arg_stacktrace kasan_arg_stacktrace __initdata; /* Whether KASAN is enabled at all. */ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled); @@ -116,7 +116,10 @@ static inline const char *kasan_mode_info(void) return "sync"; } -/* kasan_init_hw_tags_cpu() is called for each CPU. */ +/* + * kasan_init_hw_tags_cpu() is called for each CPU. + * Not marked as __init as a CPU can be hot-plugged after boot. + */ void kasan_init_hw_tags_cpu(void) { /*