no version for "function x" found: kernel tainted

[nayan kumar]

Hi All, I am using two Dual BSD/GPL drivers for a stack development project. Both modules use the MODULE_LICENSE("Dual BSD/GPL "). One of the drivers depends on the other. When the modules gets loaded after issuing insmod command , I see a tainted message in the kernel output from the module that is calling the (function x) exported by other module that a exported (function x ) has no version. 
How do I fix this? - there is a requirement that no tainted messages appear. 
Thanks 
 
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