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 DFBD3C433F5 for ; Fri, 8 Apr 2022 14:09:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236647AbiDHOLS (ORCPT ); Fri, 8 Apr 2022 10:11:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232875AbiDHOLN (ORCPT ); Fri, 8 Apr 2022 10:11:13 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 624562B04C1 for ; Fri, 8 Apr 2022 07:09:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649426948; 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: in-reply-to:in-reply-to:references:references; bh=Tv2qGn+XVM9ht1l7MnzD3eCbRqvWv86waF5o+uBoIiE=; b=TSkKJxEYWYIIVW8ri14v1MzHhmA2M8wV86bREVG7Vgsjp4a2sN1i8A7veGIkhg9OTVHOlE FVZALlgP750z+huk/Na+uJX4U5LdBJqrfTJAvHeyyyO3WpgKUb+NQeETijymNOY6pEOA/v 2Sx3tukhfUKWXMUAKmAophHkqCIEb+U= Received: from mail-qt1-f200.google.com (mail-qt1-f200.google.com [209.85.160.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-319-kAnH8rLaNj25xLHNgYGirg-1; Fri, 08 Apr 2022 10:09:07 -0400 X-MC-Unique: kAnH8rLaNj25xLHNgYGirg-1 Received: by mail-qt1-f200.google.com with SMTP id k1-20020ac85fc1000000b002e1c5930386so7846723qta.3 for ; Fri, 08 Apr 2022 07:09:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Tv2qGn+XVM9ht1l7MnzD3eCbRqvWv86waF5o+uBoIiE=; b=ffIOOe0Zebsc4/zPdsXH7oA/EFBB1oWcgKnWX43wnzNtn01bXYltGXXuIFxXmUowNp LuWBU+kYNflYIx9Qqwj1VSZhfnhgtM/lWVuHmgNS7rK/DCMs0f5b/Dkxad7+/G+pcijO HaTgpaFQVR2HtxuOZmYfq5TYFLBbsYzU3Yod0Z+dDn5SNxquxW2MsD/70GRN3GhwnW9p C0E8ekGpOAeCxdzi57l2jqWGvnPIhVPomGAKNS4yzSzNczd2dlDeI4ZsmP7zdncpXk83 Fcktsy7JdebySO0nz53QOflIYQNkFgZBCLmom2ykQVJU/vbKfS+o11nwpfUw21u2hH16 AtKw== X-Gm-Message-State: AOAM530S01I6TOX0UWkFxb/bNWUKIHTC5uJIWCjcUU+ZiT3epyNV7F8g jaJ/2ryNMega4MZ2D3A7o+Vy4oRk82fH11KlBg6W8qgl4CAwVv7SGXxz/wVSrtMuIbep4mCnmNc Bi8BkRf2wZFC+/fStFumzA3aL X-Received: by 2002:a05:6214:2625:b0:441:57e5:deb5 with SMTP id gv5-20020a056214262500b0044157e5deb5mr16716725qvb.105.1649426946823; Fri, 08 Apr 2022 07:09:06 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw8Th6l7cReFzSBT6Kbp6A2z5m6oqHYj+Jijbhs48eO5dNkMjzZV8Pbq3c7TsWXQjsSOhYctQ== X-Received: by 2002:a05:6214:2625:b0:441:57e5:deb5 with SMTP id gv5-20020a056214262500b0044157e5deb5mr16716693qvb.105.1649426946460; Fri, 08 Apr 2022 07:09:06 -0700 (PDT) Received: from treble ([2600:1700:6e32:6c00::15]) by smtp.gmail.com with ESMTPSA id o66-20020a375a45000000b0069be238e5e3sm863601qkb.48.2022.04.08.07.09.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Apr 2022 07:09:05 -0700 (PDT) Date: Fri, 8 Apr 2022 07:09:03 -0700 From: Josh Poimboeuf To: Peter Zijlstra Cc: x86@kernel.org, linux-kernel@vger.kernel.org, rick.p.edgecombe@intel.com, Thomas Gleixner Subject: Re: [PATCH 1/4] lib/strn*,objtool: Enforce user_access_begin() rules Message-ID: <20220408140903.g4vs5laat7crxoos@treble> References: <20220408094552.432447640@infradead.org> <20220408094718.262932488@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20220408094718.262932488@infradead.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 08, 2022 at 11:45:53AM +0200, Peter Zijlstra wrote: > Apparently GCC can fail to inline a 'static inline' single caller > function: > > lib/strnlen_user.o: warning: objtool: strnlen_user()+0x33: call to do_strnlen_user() with UACCESS enabled > lib/strncpy_from_user.o: warning: objtool: strncpy_from_user()+0x33: call to do_strncpy_from_user() with UACCESS enabled > > Reported-by: Thomas Gleixner > Signed-off-by: Peter Zijlstra (Intel) Presumably because of ifdef CONFIG_DEBUG_SECTION_MISMATCH KBUILD_CFLAGS += -fno-inline-functions-called-once endif which I've been wanting to remove since its only true purpose seems to be creating countless __always_inline patches... -- Josh