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[209.85.128.48]) by smtp.gmail.com with ESMTPSA id ja10-20020a170907988a00b006f3ef214e28sm2665767ejc.142.2022.05.28.13.31.41 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 28 May 2022 13:31:42 -0700 (PDT) Received: by mail-wm1-f48.google.com with SMTP id c5-20020a1c3505000000b0038e37907b5bso6415419wma.0 for ; Sat, 28 May 2022 13:31:41 -0700 (PDT) X-Received: by 2002:a1c:7207:0:b0:397:66ee:9d71 with SMTP id n7-20020a1c7207000000b0039766ee9d71mr12380873wmc.8.1653769900324; Sat, 28 May 2022 13:31:40 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Linus Torvalds Date: Sat, 28 May 2022 13:31:24 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: mainline build failure due to f1e4c916f97f ("drm/edid: add EDID block count and size helpers") To: Arnd Bergmann Cc: Sudip Mukherjee , Russell King , Viresh Kumar , Shiraz Hashim , Jani Nikula , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , dri-devel , Linux Kernel Mailing List , Linux ARM , SoC Team X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220528_133146_749600_FC60D06A X-CRM114-Status: GOOD ( 13.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, May 28, 2022 at 11:59 AM Arnd Bergmann wrote: > > It's CONFIG_ARM_AEABI, which is normally set everywhere. Without this > option, you the kernel is built for the old 'OABI' that forces all non-packed > struct members to be at least 16-bit aligned. Looks like forced word (32 bit) alignment to me. I wonder how many other structures that messes up, but I committed the EDID fix for now. This has presumably been broken for a long time, but maybe the affected targets don't typically use EDID and kernel modesetting, and only use some fixed display setup instead. Those structure definitions go back a _loong_ time (from a quick 'git blame' I see November 2008). But despite that, I did not mark my fix 'cc:stable' because I don't know if any of those machines affected by this bad arm ABI issue could possibly care. At least my tree hopefully now builds on them, with the BUILD_BUG_ON() that uncovered this. Linus _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel