Merge remote branch 'origin/master'

arch/xtensa/Makefile

arch/xtensa/configs/iss_defconfig

arch/xtensa/include/asm/cacheflush.h

arch/xtensa/include/asm/coprocessor.h

arch/xtensa/include/asm/elf.h

arch/xtensa/include/asm/pgalloc.h

arch/xtensa/include/asm/processor.h

arch/xtensa/include/asm/ptrace.h

arch/xtensa/kernel/Makefile

arch/xtensa/kernel/asm-offsets.c

arch/xtensa/kernel/entry.S

arch/xtensa/kernel/head.S

arch/xtensa/platforms/iss/network.c