Re: [PATCH] ARM: add BUILD_BUG_ON to check if fixmap range spans multiple pmds
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
Date: 2021-10-26 08:59:46
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On Sun, Oct 24, 2021 at 11:44:31PM +0200, Linus Walleij wrote:
On Wed, Oct 20, 2021 at 7:50 AM [off-list ref] wrote:quoted
From: Quanyang Wang <redacted> Not only the early fixmap range, but also the fixmap range should be checked if it spans multiple pmds. When enabling CONFIG_DEBUG_HIGHMEM, some systems which contain up to 16 CPUs will crash. Signed-off-by: Quanyang Wang <redacted>Looks reasonable to me. Reviewed-by: Linus Walleij <redacted> Please submit this patch into Russell's patch tracker.
... and has totally broken what looks like _all_ ARM kernel builds. It can not have been tested. Maybe it's uncovered a previously unknown problem, but causing such a wide-range regression is disappointing. I'm going to revert this commit. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel