From patchwork Mon Dec 6 21:44:07 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: 12659799 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id EABA9C433EF for ; Mon, 6 Dec 2021 21:59:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B70FD6B0085; Mon, 6 Dec 2021 16:47:09 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id AD1226B009D; Mon, 6 Dec 2021 16:47:09 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8FDD36B00A8; Mon, 6 Dec 2021 16:47:09 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0164.hostedemail.com [216.40.44.164]) by kanga.kvack.org (Postfix) with ESMTP id 790EA6B0085 for ; Mon, 6 Dec 2021 16:47:09 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 4AD258531D for ; Mon, 6 Dec 2021 21:46:59 +0000 (UTC) X-FDA: 78888704958.24.9B05729 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf12.hostedemail.com (Postfix) with ESMTP id D9EA010000A8 for ; Mon, 6 Dec 2021 21:46:58 +0000 (UTC) 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=1638827217; 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=H+x4/GNYyuJ4olLesp51NHArgpf+Wp1NvuW2iXEozGc=; b=mAzNzcsSBYCdZLIQLvxhgKJyEv+94RCDE0NW/I8ThfTBTWQcoPwEV4ejLqmoraovWDrHXN QG4PRjKrnYOllVYAWn2+ezBBymFuz/h/YuzxEU5k0u0tprs2rmuL+VOuSYpfyXGkYHvRzF Vn3XzrJp1oVgI+s0T6UvX/AGAQAemqk= From: andrey.konovalov@linux.dev To: Marco Elver , Alexander Potapenko , Vincenzo Frascino , Catalin Marinas , Peter Collingbourne Cc: Andrey Konovalov , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Andrew Morton , linux-mm@kvack.org, Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH v2 30/34] kasan: simplify kasan_init_hw_tags Date: Mon, 6 Dec 2021 22:44:07 +0100 Message-Id: <1de4bcc3b3f7da3574a2e8e3f6dab48f47aa03b5.1638825394.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: D9EA010000A8 X-Stat-Signature: a63rjbfkg1owq1zb8djbad4h7drkf4zd Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=mAzNzcsS; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf12.hostedemail.com: domain of andrey.konovalov@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev X-HE-Tag: 1638827218-493533 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Andrey Konovalov Simplify kasan_init_hw_tags(): - Remove excessive comments in kasan_arg_mode switch. - Combine DEFAULT and ON cases in kasan_arg_stacktrace switch. Signed-off-by: Andrey Konovalov --- Changes v1->v2: - Add this patch. --- mm/kasan/hw_tags.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index 983ae15ed4f0..e12f2d195cc9 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -159,20 +159,15 @@ void __init kasan_init_hw_tags(void) switch (kasan_arg_mode) { case KASAN_ARG_MODE_DEFAULT: - /* - * Default to sync mode. - */ + /* Default to sync mode. */ fallthrough; case KASAN_ARG_MODE_SYNC: - /* Sync mode enabled. */ kasan_mode = KASAN_MODE_SYNC; break; case KASAN_ARG_MODE_ASYNC: - /* Async mode enabled. */ kasan_mode = KASAN_MODE_ASYNC; break; case KASAN_ARG_MODE_ASYMM: - /* Asymm mode enabled. */ kasan_mode = KASAN_MODE_ASYMM; break; } @@ -180,14 +175,13 @@ void __init kasan_init_hw_tags(void) switch (kasan_arg_stacktrace) { case KASAN_ARG_STACKTRACE_DEFAULT: /* Default to enabling stack trace collection. */ + fallthrough; + case KASAN_ARG_STACKTRACE_ON: static_branch_enable(&kasan_flag_stacktrace); break; case KASAN_ARG_STACKTRACE_OFF: /* Do nothing, kasan_flag_stacktrace keeps its default value. */ break; - case KASAN_ARG_STACKTRACE_ON: - static_branch_enable(&kasan_flag_stacktrace); - break; } pr_info("KernelAddressSanitizer initialized (hw-tags, mode=%s, stacktrace=%s)\n",