From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F098C433FE for ; Mon, 24 Jan 2022 18:07:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245098AbiAXSHy (ORCPT ); Mon, 24 Jan 2022 13:07:54 -0500 Received: from out0.migadu.com ([94.23.1.103]:19487 "EHLO out0.migadu.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244951AbiAXSHa (ORCPT ); Mon, 24 Jan 2022 13:07:30 -0500 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=1643047648; 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=LdSOcXw1hp5Fj7UST7UQpXoVIdytjtEsxQSoeOFLx8SjFkRo2FOAZykSmAnBB63s0l5Uuz 1OEAtZIT9WPUQT12nwV/ZCGMIa8rdy84Hyp25CnCuDUwNE9eExF9qqoRVg9/9wCcD9EGLD nElJQwpewG4SGKHZMb9sCnd+9GEwY14= 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 v6 33/39] kasan: mark kasan_arg_stacktrace as __initdata Date: Mon, 24 Jan 2022 19:05:07 +0100 Message-Id: <7fa090865614f8e0c6c1265508efb1d429afaa50.1643047180.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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) { /* -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 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 10292C433EF for ; Mon, 24 Jan 2022 19:03:48 +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=Mr+ZK5ZIM9N9Z5 oNq1leCiVj+rC6Mmw1jxXvsYgd9rSgp7GfyqwGjMydoHe8DPfBTng5nLZEcxBP3kJK5Zdz59gRR82 oGx1PdF/QnrKz3mhcVtYKcD0gPNir20aNb+lMDMhcO0IgWCusdO9OsNoFlQbQNjDo1oAGvLI7rcOF QsaOOTnmAWg0IN6i8DRBgBPLt/1n7uLG4LKuJRXu5Eowb+yimqOLb/nQe2Yer7yV+VnIvfpFeuP+E i356D2Q6900ClgBpnCq1CB0WGg7TJ0uieNd7Rmzav23ZU6jDECtgezHMTjj2A6r/7nZvUNrIo3prX l8bdFDW4fXY5C7TZI2tg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nC4bY-004iXu-UT; Mon, 24 Jan 2022 19:02:17 +0000 Received: from out0.migadu.com ([94.23.1.103]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nC3kY-004Ngu-5H for linux-arm-kernel@lists.infradead.org; Mon, 24 Jan 2022 18:07:32 +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=1643047648; 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=LdSOcXw1hp5Fj7UST7UQpXoVIdytjtEsxQSoeOFLx8SjFkRo2FOAZykSmAnBB63s0l5Uuz 1OEAtZIT9WPUQT12nwV/ZCGMIa8rdy84Hyp25CnCuDUwNE9eExF9qqoRVg9/9wCcD9EGLD nElJQwpewG4SGKHZMb9sCnd+9GEwY14= 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 v6 33/39] kasan: mark kasan_arg_stacktrace as __initdata Date: Mon, 24 Jan 2022 19:05:07 +0100 Message-Id: <7fa090865614f8e0c6c1265508efb1d429afaa50.1643047180.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-20220124_100730_382901_01316D81 X-CRM114-Status: GOOD ( 12.25 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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) { /* -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel