On Mon, Jul 23, 2018 at 05:59:12PM +0100, Build bot for Mark Brown wrote: Today's -next fails to build an arm64 allmodconfig with: > arm64-allmodconfig > ERROR: "__sync_icache_dcache" [drivers/xen/xen-privcmd.ko] undefined! using aarch64-linux-gnu-gcc (Linaro GCC 5.3-2016.05) 5.3.1 20160412 however it builds perfectly fine with aarch64-linux-gnu-gcc (Linaro GCC 6.2-2016.11) 6.2.1 20161016 which honestly seems like a sensible and worthwhile upgrade at this point anyway given that it's a year and a half old so I'm going to do that for my builder (perhaps even jump on a newer version) but it seemed worth highlighting in case this is considered undesirable. A similar issue is hitting on KernelCI, we should probably look at upgrading the toolchain there too.
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