EXPORT_SYMBOL macro creates a new kernel symbol entry and puts it in a special section of the kernel image, in __ksymtab section. When modules are loaded dynamically, he loader resolves the symbols during run time by parsing the entries of this section.
For exporting a symbol , Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block.
Extern can be used for non-static functions that are statically linked during compile time.
For exporting a symbol , Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block.
Extern can be used for non-static functions that are statically linked during compile time.
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