On 20/07/17 06:36 AM, Horia Geantă wrote: > include/asm-generic/iomap.h is included before > include/linux/io-64-nonatomic-lo-hi.h: > > include/linux/io.h -> arch/powerpc/include/asm/io.h -> > include/asm-generic/iomap.h > > Thus, the "extern" version of ioread64_lo_hi and friends will be used > (and not the inline version from io-64-nonatomic-lo-hi.h). > > But for this kernel .config: > -CONFIG_GENERIC_IOMAP=n and > -there is no implementation of io{read|write}64[be]{_lo_hi|_hi_lo} in > arch/powerpc/kernel/iomap.c Ah, thanks for the triage. I'll take a look at fixing this for a v5. Logan