From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 502003016E0 for ; Wed, 25 Feb 2026 08:16:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007364; cv=none; b=YSVMecujlomeyAzD1Ur5lAr2ArD7jP7i+qfBhYRoAthMhu4csePd3xFAMBiUal9GxJFNKmDSMnfP1fq3trEwUXbz6tIDgrc0GCE9bOSM58U7yGrUl5yiRpXjAp8Ctmfow4AnVBAK19Ddr8UT5aP0R7QGsGkd63HV6mGJfpDjyNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007364; c=relaxed/simple; bh=jrTbGDe/8wYd06o9FN/Dt7fvUCi3/MbdH8vTtfIRRl8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=maamfxLNOur8sIULv573LS5qXc1TXkULF3vLh/Tf7MmvWBxApzSCzJoaaiwE7Lw8u7jHYHGvTNXo2y+lfPoIXa9dBlJlbP3XpSkrdMDNpzP3m/U0pO5ELj9GTJKsTXDOZycDo+UCbpXHI1ty46m9LgMcah+qSJ0Mf1K4vtPhf54= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=B9s7R0vu; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="B9s7R0vu" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007362; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=19vaP3y5lR+93yTFpmYDfoD2vHNlJZSHy6oOHn35u4M=; b=B9s7R0vuJJxnKL/FX3/yV+Y9VHjA7CTcVJgtwJ69xxYai+9R8Xk5ifBv6zHvwekM2mucwl LFamYeWlfVICIpkC6AfmP/d3vit9dYTKlz/ZBN3IOby4ZdZnTTdbW49qlYcB0O+wwUqTvc 0Ib3Qi8Sya+aUmIBrdcoLw41tTOnXiU= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-659-fNbyuKNINK6CJvlLPKrBfw-1; Wed, 25 Feb 2026 03:16:00 -0500 X-MC-Unique: fNbyuKNINK6CJvlLPKrBfw-1 X-Mimecast-MFC-AGG-ID: fNbyuKNINK6CJvlLPKrBfw_1772007358 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 83A1E18004BB; Wed, 25 Feb 2026 08:15:58 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.55]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D0B361800465; Wed, 25 Feb 2026 08:15:48 +0000 (UTC) From: Baoquan He To: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, linux-kernel@vger.kernel.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, linux-s390@vger.kernel.org, hca@linux.ibm.com, Baoquan He Subject: [PATCH v5 08/15] arch/loongarch: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:05 +0800 Message-ID: <20260225081412.76502-9-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: RdTIbtyFxL69At303sqMsI57GasOfKM1JRqX7P7fntk_1772007358 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. Signed-off-by: Baoquan He Cc: loongarch@lists.linux.dev --- arch/loongarch/mm/kasan_init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c index 0fc02ca06457..047a059544e1 100644 --- a/arch/loongarch/mm/kasan_init.c +++ b/arch/loongarch/mm/kasan_init.c @@ -269,6 +269,9 @@ void __init kasan_init(void) u64 i; phys_addr_t pa_start, pa_end; + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; /* * If PGDIR_SIZE is too large for cpu_vabits, KASAN_SHADOW_END will * overflow UINTPTR_MAX and then looks like a user space address. -- 2.52.0