On Wed, Aug 10, 2016 at 09:31:05PM +0200, Arnd Bergmann wrote: > On Wednesday, August 10, 2016 11:12:53 AM CEST Russell King - ARM Linux wrote: > > There's the TLS emulation too, but that writes via the vectors mapping > > at 0xffff0ff0. > > Ok, so that should be safe. Can we change the fiq code to also use the > high mapping and then take the __ro_after_init patch on top? We can't - if the kernel is configured without the kuser helpers in the vectors page, it's mapped read-only. I'm not sure what the intersection is between platforms that can have FIQs and platforms that can disable the kuser helpers. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
