kernelconfig_penguin
CONFIG_ACCESS_CHECK is not available for the default architecture x86.
Result is shown for architecture blackfin

Check the user pointer address

configname: CONFIG_ACCESS_CHECK

Linux Kernel Configuration
└─> Kernel hacking
└─> Check the user pointer address

Usually the pointer transfer from user space is checked to see if its
address is in the kernel space.

Say N here to disable that check to improve the performance.