Hello Ley Foon, On Apr 19, Ley Foon Tan wrote: > + > +#ifndef CONFIG_ALIGNMENT_TRAP > +/* Alignment exception handler */ > +asmlinkage void handle_unaligned_c(struct pt_regs *fp, int cause) > +{ > + unsigned long addr = RDCTL(CTL_BADADDR); > + > + cause >>= 2; > + fp->ea -= 4; > + > + if (fixup_exception(fp)) > + return; This will throw an undeclared error if you build with CONFIG_ALIGNMENT_TRAP=n. You need to add the uaccess.h header, or implement some similar fix. -- Ezequiel García, Free Electrons Embedded Linux, Kernel and Android Engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html