KERNEL_STACK_SHIFT 73 arch/xtensa/include/asm/kmem_layout.h #define KERNEL_STACK_SIZE (1 << KERNEL_STACK_SHIFT) KERNEL_STACK_SHIFT 17 arch/xtensa/include/asm/thread_info.h #define CURRENT_SHIFT KERNEL_STACK_SHIFT KERNEL_STACK_SHIFT 125 arch/xtensa/include/asm/thread_info.h #define THREAD_SIZE_ORDER (KERNEL_STACK_SHIFT - PAGE_SHIFT)