On Fri, 29 Apr 2022, Niklas Schnelle wrote: > We introduce a new HAS_IOPORT Kconfig option to indicate support for > I/O Port access. In a future patch HAS_IOPORT=n will disable compilation > of the I/O accessor functions inb()/outb() and friends on architectures > which can not meaningfully support legacy I/O spaces such as s390 or > where such support is optional. The "depends on" relations on HAS_IOPORT > in drivers as well as ifdefs for HAS_IOPORT specific sections will be > added in subsequent patches on a per subsystem basis. [...] > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index de3b32a507d2..4c55df08d6f1 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -47,6 +47,7 @@ config MIPS > select GENERIC_SMP_IDLE_THREAD > select GENERIC_TIME_VSYSCALL > select GUP_GET_PTE_LOW_HIGH if CPU_MIPS32 && PHYS_ADDR_T_64BIT > + select HAS_IOPORT > select HAVE_ARCH_COMPILER_H > select HAVE_ARCH_JUMP_LABEL > select HAVE_ARCH_KGDB if MIPS_FP_SUPPORT NAK, not all MIPS systems have the port I/O space, and we have it already handled via the NO_IOPORT_MAP option. We'll need to have HAS_IOPORT set to !NO_IOPORT_MAP (or vice versa) for the MIPS architecture. Maciej
