:587:8: error: unknown type name 'irqreturn_t'
drivers/ptp/ptp_vmclock.c:593:9: error: use of undeclared identifier 'IRQ_HANDLED'
drivers/ptp/ptp_vmclock.c:620:9: error: call to undeclared function 'devm_request_irq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
drivers/ptp/ptp_vmclock.c:620:60: error: use of undeclared identifier 'IRQF_SHARED'