Re: EXPORT_SYMBOL Vs extern?

[Li Zefan <lizf@xxxxxxxxxxxxxx>]

pradeep singh wrote:
> Hi All,
> 
> A Quick but perhaps dumbass query,
> 
> 1. int function_A(...)
>     {
>          ...;
>     }
> 
> 2. int function_B(...)
>     {
>          ...;
>     }
>     EXPORT_SYMBOL(function_B);
> 
> Okay i understand I should use the EXPORT_SYMBOL way if i want
> function_B to be used by rest of the kernel.
> 

Functions and variables which are exported through EXPORT_SYMBOL is
for kernel module code.

> Now I have a doubt -
> 
> Is it a compulsion for a function which need to be used in any other
> source file, exported through EXPORT_SYMBOL only?
> Does this means all the places in kernel(and there are loads of them),
> where a function is non-static and is used in other source files
> should actually be using EXPORT_SYMBOL?
> 
> Thanks,
>      ~Pradeep


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