Pull asm-generic updates from Arnd Bergmann: "This is mainly set of cleanups of asm-generic/io.h, resolving problems with inconsistent semantics of ioread64/iowrite64 that were causing runtime and build issues. The "GENERIC_IOMAP" version that switches between inb()/outb() and readb()/writeb() style accessors is now only used on architectures that have PC-style ISA devices that are not memory mapped (x86, uml, m68k-q40 and powerpc-powernv), while alpha and parisc use a more complicated variant and everything else just maps the ioread interfaces to plan MMIO (readb/writeb etc). In addition there are two small changes from Raag Jadav to simplify the asm-generic/io.h indirect inclusions and from Jann Horn to fix a corner case with read_word_at_a_time" * tag 'asm-generic-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: rwonce: fix crash by removing READ_ONCE() for unaligned read rwonce: handle KCSAN like KASAN in read_word_at_a_time() m68k: coldfire: select PCI_IOMAP for PCI mips: export pci_iounmap() mips: fix PCI_IOBASE definition m68k/nommu: stop using GENERIC_IOMAP mips: drop GENERIC_IOMAP wrapper powerpc: asm/io.h: remove split ioread64/iowrite64 helpers parisc: stop using asm-generic/iomap.h sh: remove duplicate ioread/iowrite helpers alpha: stop using asm-generic/iomap.h io.h: drop unused headers drm/draw: include missing headers asm-generic/io.h: rework split ioread64/iowrite64 helpers