From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-2.orcon.net.nz (smtp-2.orcon.net.nz [60.234.4.43]) (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 CE64D17736; Sat, 4 Apr 2026 01:52:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.234.4.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775267561; cv=none; b=jjJ2GBuCoRo9ZBwDTnbRHhcN86AeypDtKkWLknekW9yK3wKsTy746TrRWSlUhVwmnLPpozEgIjGIPDKKflfTLOLVpwCWyJ3pyugPmya3nwbTiN0iOgU3LS2c23ASeXE5ogu/PpIDB+LtGfO6OQZ8Xp+6bs3y+7X+h8enKeWYXC4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775267561; c=relaxed/simple; bh=vFPecpLdEX4b/QcwytR03KKL2k3x6B8TGsXEuHAEb6I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Iu6jC3MYD+wHHvekvBKMtS9NyGNElj3RPVFqdGU8xnS9vWe/EIFErtDy48w+X3NkEn59tv1UOBL5/sQwiY9ZloA9Cw4mEiNFFG8S/Ew4+s7uuxWIIsRxdH/wVkKReDqNpsxf1Ubop5tg+Q9vULz7N7dNb104XY+KXVvE1YMbH4U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=orcon.net.nz; spf=pass smtp.mailfrom=orcon.net.nz; dkim=pass (2048-bit key) header.d=orcon.net.nz header.i=@orcon.net.nz header.b=mA7MDk7+; arc=none smtp.client-ip=60.234.4.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=orcon.net.nz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=orcon.net.nz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=orcon.net.nz header.i=@orcon.net.nz header.b="mA7MDk7+" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=orcon.net.nz; s=s1; h=In-Reply-To:Content-Type:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=xwOBfy1/uO6y9VN5Adr/oFgn1RRflcvLWkZWSww4kxQ=; b=mA7MDk7+onHa1xQdBaiIKAtxmN 7OtIVuS6GuHwJs8A/oxSGlNkQcbrhNjKKXoxUv9FisxsWdmmzQgxGRZdREtX0HBw8lKHQm71CA3xs DLkaqcm63WDIss737o92mi4CNtqe9dqB2GjbJgbYNTnZu2K0GkWGtIqRPcyiIgpaOqiTO6McJnAaF CNylISqoqi9+aupaA6K1Gt56/COO7QBNbKHVYO8I+kvY3JHGEjYyKy/kubkFfdRU1Ox9dLn+ZSd1x zCMallXruXHYe+Yzt57sZn173r0TY06To+BemP4HZ5+Ih9ln3uiBOn5hZ9JdEl5NuTZMYa99uRr+1 vcdi2kMQ==; Received: from [121.99.247.178] (port=26452 helo=creeky) by smtp-2.orcon.net.nz with esmtpa (Exim 4.90_1) (envelope-from ) id 1w8pvv-0002aN-Am; Sat, 04 Apr 2026 14:36:19 +1300 Date: Sat, 4 Apr 2026 14:36:14 +1300 From: Michael Cree To: Matt Turner Cc: Magnus Lindholm , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] alpha: Add ARCH_HAS_PTE_SPECIAL support Message-ID: Mail-Followup-To: Michael Cree , Matt Turner , Magnus Lindholm , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260403150048.488266-1-mattst88@gmail.com> Precedence: bulk X-Mailing-List: linux-alpha@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260403150048.488266-1-mattst88@gmail.com> X-GeoIP: NZ X-Spam_score: -2.9 X-Spam_score_int: -28 X-Spam_bar: -- Hi Matt, On Fri, Apr 03, 2026 at 11:00:48AM -0400, Matt Turner wrote: > Add _PAGE_SPECIAL using bit 19 (0x80000), which is unused in the Alpha > PTE layout. This enables pte_special()/pte_mkspecial() for marking PTEs > that are not backed by struct page (VDSO mappings, zero page, > io_remap_pfn_range, etc.). > > Include _PAGE_SPECIAL in _PAGE_CHG_MASK so it is preserved across > pte_modify() calls. > > Assisted-by: Claude:claude-opus-4-6 > Signed-off-by: Matt Turner > --- > arch/alpha/Kconfig | 1 + > arch/alpha/include/asm/pgtable.h | 5 ++++- > 2 files changed, 5 insertions(+), 1 deletion(-) > > diff --git ./arch/alpha/Kconfig ./arch/alpha/Kconfig > index a5feb98cc088..a29788e588ee 100644 > --- ./arch/alpha/Kconfig > +++ ./arch/alpha/Kconfig > @@ -8,6 +8,7 @@ config ALPHA > select ARCH_HAS_FAST_MULTIPLIER > select ARCH_HAS_GCOV_PROFILE_ALL > select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE > + select ARCH_HAS_PTE_SPECIAL > select ARCH_HAS_UBSAN > select ARCH_MIGHT_HAVE_PC_PARPORT > select ARCH_MIGHT_HAVE_PC_SERIO On what kernel does this patch apply? My master branch has none of: ARCH_HAS_FAST_MULTIPLIER ARCH_HAS_GCOV_PROFILE_ALL ARCH_HAS_UBSAN and they don't seem to be added at all in the other patches you sent. Cheers, Michael.