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Date: Tue, 12 Jan 2021 14:20:49 +0100 From: Lukas Wunner <lukas@...ner.de> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Will Deacon <will@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Arnd Bergmann <arnd@...nel.org>, Russell King - ARM Linux admin <linux@...linux.org.uk>, linux-toolchains@...r.kernel.org, Mark Rutland <mark.rutland@....com>, Theodore Ts'o <tytso@....edu>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Andreas Dilger <adilger.kernel@...ger.ca>, Ext4 Developers List <linux-ext4@...r.kernel.org>, Linux ARM <linux-arm-kernel@...ts.infradead.org> Subject: Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues On Fri, Jan 08, 2021 at 12:02:53PM -0800, Linus Torvalds wrote: > I appreciate Arnd pointing out "--std=gnu11", though. What are the > actual relevant language improvements? > > Variable declarations in for-loops is the only one I can think of. I > think that would clean up some code (and some macros), but might not > be compelling on its own. Anonymous structs/unions. I used to have a use case for that in struct efi_dev_path in include/linux/efi.h, but Ard Biesheuvel refactored it in a gnu89-compatible way for v5.7 with db8952e7094f. [The above was copy-pasted from last time this discussion came up in July 2020. Back then, Kirill Shutemov likewise mentioned the local variables in loops feature: https://lore.kernel.org/lkml/20200710111724.m4jaci73pykalxys@wunner.de/ ] Thanks, Lukas
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