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 0E0FDC433EF for ; Tue, 30 Nov 2021 14:55:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242956AbhK3O6S (ORCPT ); Tue, 30 Nov 2021 09:58:18 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:49334 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232547AbhK3Ozc (ORCPT ); Tue, 30 Nov 2021 09:55:32 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 51E4CB817AB; Tue, 30 Nov 2021 14:52:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4E6D4C8D187; Tue, 30 Nov 2021 14:52:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638283931; bh=vE312v6223elY83DNKZK/9DVrz8d8dbSesJ+1sYfWeM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YoY9YEQzcd2CYl41wMB43tucWAO7WhnP66pZ7VhPR8Og0bYrsaMZ4hPkFELmaQGmu 0FLrEneiDexoxbger2tOoDzgyxUygeGo5Z2jX8LiVi8vVWH3atQLWLlcTs5h/8+Bxp za23yJ2mKbMLEZVu2we3HV7HI7kuJalKPlFYi3eg2yGGOKUaEo1EstEVWqz/7gAWwD 2+weIqHmkiXj9t0sPKjsWUamC1iM1viOnhqrgwm16cZDVQ5cvw1xoCxWix0XP/aNp/ 0WyjLGIpXZ17b6XfL1Qf6LwC1e31E0FpWXjm1zlExCXK/FEigMZXEdXEdKso18KqAf 6GRPusmJp6sTA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Helge Deller , John David Anglin , Sasha Levin , James.Bottomley@HansenPartnership.com, svens@stackframe.org, linux-parisc@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 07/25] parisc: Provide an extru_safe() macro to extract unsigned bits Date: Tue, 30 Nov 2021 09:51:37 -0500 Message-Id: <20211130145156.946083-7-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211130145156.946083-1-sashal@kernel.org> References: <20211130145156.946083-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Helge Deller [ Upstream commit 169d1a4a2adb2c246396c56aa2f9eec3868546f1 ] The extru instruction leaves the most significant 32 bits of the target register in an undefined state on PA 2.0 systems. Provide a macro to safely use extru on 32- and 64-bit machines. Suggested-by: John David Anglin Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- arch/parisc/include/asm/assembly.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h index a39250cb7dfcf..0c95030017e8f 100644 --- a/arch/parisc/include/asm/assembly.h +++ b/arch/parisc/include/asm/assembly.h @@ -135,6 +135,17 @@ extrd,u \r, 63-(\sa), 64-(\sa), \t .endm + /* Extract unsigned for 32- and 64-bit + * The extru instruction leaves the most significant 32 bits of the + * target register in an undefined state on PA 2.0 systems. */ + .macro extru_safe r, p, len, t +#ifdef CONFIG_64BIT + extrd,u \r, 32+(\p), \len, \t +#else + extru \r, \p, \len, \t +#endif + .endm + /* load 32-bit 'value' into 'reg' compensating for the ldil * sign-extension when running in wide mode. * WARNING!! neither 'value' nor 'reg' can be expressions -- 2.33.0