> +void __iomem * > +arch_ioremap(phys_addr_t *paddr, size_t size, unsigned long *prot_val) > { > if (!static_branch_unlikely(&have_mio)) > + return (void __iomem *) *paddr; > + return NULL; This logic isn't new in the patch, but it could really use a comment as it is rather non-obvious.