Builded karnel with everything done, but got error -2

[PlisskenPWD]

Hello, aftert following this steps.

Apply patches in patch folder
Copy the rwMem folder to the drivers folder in the kernel source code
Add a line obj-$(CONFIG_RW_MEM) += rwMem/ to the end of drivers/Makefile
Build the kernel again

everything done from there,

when i try to start the server by using this command ./a.out
i got this error:-2

is it something wrong with my config ?

[marktohark]

cannot find /dev/rwmem
reference to my build step
#5 (comment)