On Fri, Feb 01, 2019 at 09:35:59PM +0000, Build bot for Mark Brown wrote:
Friday's -next fails to build an arm64 allmodconfig due to (among other things):
arm64-allmodconfig ERROR: "mbox_flush" [drivers/tty/serial/tegra-tcu.ko] undefined!
since that symbol isn't exported by the mailbox API. Either the driver shouldn't be using it or we need an EXPORT_SYMBOL_GPL() adding.