> From: Arnd Bergmann <arnd@xxxxxxxx> > Sent: Wednesday, September 18, 2019 1:01 PM > > When CONFIG_PM is disabled, we get a couple of harmless warnings: > > drivers/hv/vmbus_drv.c:918:12: error: unused function 'vmbus_suspend' > [-Werror,-Wunused-function] > drivers/hv/vmbus_drv.c:937:12: error: unused function 'vmbus_resume' > [-Werror,-Wunused-function] > drivers/hv/vmbus_drv.c:2128:12: error: unused function 'vmbus_bus_suspend' > [-Werror,-Wunused-function] > drivers/hv/vmbus_drv.c:2208:12: error: unused function 'vmbus_bus_resume' > [-Werror,-Wunused-function] > > Mark these functions __maybe_unused to let gcc drop them silently. Hi Arnd, Thanks for reporting the issue! If CONFIG_PM is not set, IMO it's better to comment out these functions. :-) I'll post a patch for this with you Cc'd. Thanks, -- Dexuan