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 F36F9C433F5 for ; Tue, 30 Nov 2021 15:13:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243750AbhK3PPF (ORCPT ); Tue, 30 Nov 2021 10:15:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236698AbhK3O5A (ORCPT ); Tue, 30 Nov 2021 09:57:00 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6727CC0698C2; Tue, 30 Nov 2021 06:51:06 -0800 (PST) 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 0E85CB81A53; Tue, 30 Nov 2021 14:51:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 032A8C53FCF; Tue, 30 Nov 2021 14:51:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638283864; bh=vE312v6223elY83DNKZK/9DVrz8d8dbSesJ+1sYfWeM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aCWtlgOyC8f4aMro4j4pFzZ77Ynz2D4YPgxXZx4dXhVyCde9LfEru/tlnthmLGPSt L+rkKBzZeXMwtsrLTT3EOucKncWLVFaxNmpT5Il5dbEV7q6tX2fPaPAcgVZ3UU9o08 Jm3NPBsEjJThOaY6zUmDgPS7bl0MOmwEnnObvJ/lUm5EmaGGMUXODlsRm6SAd02oKB s0zql3sjATqtGrALK7feqgv0L/BLSTUZwGDR8cW/VbBGwvy937RgswbptBTwEP8KkQ VeIIvoQ2TTWWzS4ImA9ddWkBdmhoad98X8rMCWv7i8hDe8rDSROIAHta/uF4qZAZQo wxvCTcO9+zHWg== 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 5.10 17/43] parisc: Provide an extru_safe() macro to extract unsigned bits Date: Tue, 30 Nov 2021 09:49:54 -0500 Message-Id: <20211130145022.945517-17-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211130145022.945517-1-sashal@kernel.org> References: <20211130145022.945517-1-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