Major Features Switchable on ICS2(主要功能转换的开关)

按要求配置后，报错：tinnoes75_s9050_kernel.log_err
../mediatek/platform/mt6575/kernel/drivers/nand/built-in.o: No such file: No such file or directory

这里的SMP--UP是什么意思?

SMP ↔ UP  
[Switch to UP]:
TARGET_CPU_SMP=false
(mediatek/config/XXX/autoconfig/Kconfig/project)
CONFIG_TREE_PREEMPT_RCU=yes
CONFIG_MTK_WD_KICKER is not set
CONFIG_LOCAL_WDT is not set
[Switch to SMP]:
TARGET_CPU_SMP=true
(mediatek/config/XXX/autoconfig/Kconfig/project)
CONFIG_TREE_PREEMPT_RCU is not set
CONFIG_MTK_WD_KICKER = y
CONFIG_LOCAL_WDT = y
请问这里的SMP -- UP 是什么意思

:):):)