From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: [PATCH 2/2] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Date: Tue, 29 Dec 2015 12:49:33 +0100 (CET) Message-ID: References: <1451381195-9315-1-git-send-email-ynorov@caviumnetworks.com> <1451381195-9315-3-git-send-email-ynorov@caviumnetworks.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: Received: from www.linutronix.de ([62.245.132.108]:42281 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751538AbbL2Luc (ORCPT ); Tue, 29 Dec 2015 06:50:32 -0500 In-Reply-To: <1451381195-9315-3-git-send-email-ynorov@caviumnetworks.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Yury Norov Cc: arnd@arndb.de, cmetcalf@ezchip.com, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, klimov.linux@gmail.com On Tue, 29 Dec 2015, Yury Norov wrote: > All new 32-bit architectures should have 64-bit off_t type, but existing > architectures has 32-bit ones. > > To handle it, new config option is added to arch/Kconfig that defaults > ARCH_32BIT_OFF_T to be disabled for non-64 bit architectures. All existing > 32-bit architectures enable it explicitly here. > > New option affects force_o_largefile() behaviour. Namely, if off_t is > 64-bits long, we have no reason to reject user to open big files. > > Note that even if architectures has only 64-bit off_t in the kernel > (arc, c6x, h8300, hexagon, metag, nios2, openrisc, tile32 and unicore32), > a libc may use 32-bit off_t, and therefore want to limit the file size > to 4GB unless specified differently in the open flags. For the x86 part: Acked-by: Thomas Gleixner