CONFIG_KERNEL_STACK_ORDER    9 arch/um/include/asm/thread_info.h #define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
CONFIG_KERNEL_STACK_ORDER   10 arch/um/include/asm/thread_info.h #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
CONFIG_KERNEL_STACK_ORDER  270 arch/um/kernel/process.c 	stack = sp & (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER);