CONFIG_NEED_RET_TO_USER is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_NEED_RET_TO_USER (not configurable)

configname: CONFIG_NEED_RET_TO_USER

Linux Kernel Configuration
└─>NEED_RET_TO_USER
In linux kernel since version 3.1 (release Date: 2011-10-24)  
is depended by
CONFIG_ARCH_IOP32X