Wenhua Zhao <[EMAIL PROTECTED]> wrote: Hi,

Is that true that every time I do EXPORT_SYMBOL(my_symbol),  I should
check that `my_symbol' is not already defined?
<<<yes, this is true>>>>

There are so many drivers in the kernel.  How do developers make sure
that their symbols are unique?
<<< yes, there are so many drivers in the kernel but only those symbols are 
exported which required by other drivers eg. you can't define a function 
printk() with same argument>>>

Regards,
Wenhua

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