From nobody Sat Oct 4 06:34:52 2025 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 1B6132853FD for ; Wed, 20 Aug 2025 05:36:15 +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=1755668177; cv=none; b=gdZbKzvyPn3TzkcvjZVO6OC0UYkYVsaeA2jmeafUPBPzrfR8FBg6N4uiJALz+eHiFSrR+8G8+nzfPgAll4ZAoBx8GEFcmDSY3MyY8DkfSTAxXGXnCY+DplUlD/Qr8CvblS6m9C3IbSc5eBtzfkabKRyyMbxf0J/a6546Fbfp42E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755668177; c=relaxed/simple; bh=qK2KiUugJNUUcLC7trMBab+1oibPnFRPbNs9ZqggVBk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=AJNEh7hVT0SPT3PJ+Tw1JtNiS1wqIVOkM2/suRSNtFuXQ/jb5qFQkkCGfrw7c/qzgwjetlatxjSTaYI2bob09z/BtB/rJc+JR0jdrQjh4dzb1/uV+yAnD02BdAqlhE13V1WhQE9g9FqpmSFvKXDKrIdZ3QnQ79ILq1cvBHsb10w= 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=N9/RCAk+; 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="N9/RCAk+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755668175; 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=HIvq87a0AAq2d23Q/rNsSw9xnqrtCb4IHcYwpyhrt5Y=; b=N9/RCAk+81Pg9Ni1O+xoqWU6FAiZ6Xj5ksNq5TKbnDeMyLp7WcYeyV1JltsUrs27o3dRCw QDoBkIdfWrRpLbKviVndppGFDnQSYXc91THZi+LsLRj4FCp4lChYMYbmC7PhXxYKmM7m6z br2DcGN66LB0lIrBJUBTR/SC8BCANnc= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-661-P3sGgTDEOVKL3Cw8VTzXMw-1; Wed, 20 Aug 2025 01:36:09 -0400 X-MC-Unique: P3sGgTDEOVKL3Cw8VTzXMw-1 X-Mimecast-MFC-AGG-ID: P3sGgTDEOVKL3Cw8VTzXMw_1755668167 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5E17F195605A; Wed, 20 Aug 2025 05:36:07 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.99]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 661C219560B0; Wed, 20 Aug 2025 05:35:58 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, sj@kernel.org, lorenzo.stoakes@oracle.com, elver@google.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , loongarch@lists.linux.dev Subject: [PATCH v3 06/12] arch/loongarch: don't initialize kasan if it's disabled Date: Wed, 20 Aug 2025 13:34:53 +0800 Message-ID: <20250820053459.164825-7-bhe@redhat.com> In-Reply-To: <20250820053459.164825-1-bhe@redhat.com> References: <20250820053459.164825-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Content-Type: text/plain; charset="utf-8" And also add code to enable kasan_flag_enabled, this is for later usage. Signed-off-by: Baoquan He Cc: loongarch@lists.linux.dev --- arch/loongarch/mm/kasan_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c index d2681272d8f0..0c32eee6910f 100644 --- a/arch/loongarch/mm/kasan_init.c +++ b/arch/loongarch/mm/kasan_init.c @@ -267,6 +267,8 @@ void __init kasan_init(void) u64 i; phys_addr_t pa_start, pa_end; =20 + 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. @@ -327,6 +329,9 @@ void __init kasan_init(void) csr_write64(__pa_symbol(swapper_pg_dir), LOONGARCH_CSR_PGDH); local_flush_tlb_all(); =20 + /* KASAN is now initialized, enable it. */ + static_branch_enable(&kasan_flag_enabled); + /* At this point kasan is fully initialized. Enable error messages */ init_task.kasan_depth =3D 0; pr_info("KernelAddressSanitizer initialized.\n"); --=20 2.41.0