Compilation issue in module programming

Hi, I am writing a module, that communicates to the other module by queues. I am using sys_msgget and related functions. I have assumed, if the symbol is present on /proc/kallsyms then the other modules can refer symbol. For an example, the sys_msgget is appeared on the symboltable. But it is not exported by any one of the files(EXPORT_SYMBOL). So when i tried to use the sys_msgget to create a message queue, my module was compiled with the warning and it never loaded with insmod. It always says it could not resove the symbol sys_msgget. So i added EXPORT_SYMBOL(sys_msgget) in arch/arm/kernel/armksyms.c. then build the image and my module. Then the insmod works with my module without any problem. My question is that can i do this way??. Can i use sys_msgget in module programming??. Since it is not explicitly exported i have the doubhts.