Sorry for the typo,
MODULE_VERSION should be read as MODULE_LICENSE.
Thanks,
~amit
On Fri, Dec 5, 2008 at 6:03 PM, amit mehta <[EMAIL PROTECTED]> wrote:
> Hi,
>
> How does EXPORT_SYMBOL work ?
> All i know is that its a way by which a kernel module can export symbols to
> other kernel modules.
> Just to get more information on it, i looked for its definition(in
> linux/module.h) and found that
> its defined as:
> #define EXPORT_SYMBOL(sym) \
> __EXPORT_SYMBOL(sym, "")
>
> where,
> #define __EXPORT_SYMBOL(sym, sec) \
> extern typeof(sym) sym; \
> __CRC_SYMBOL(sym, sec) \
> static const char __kstrtab_##sym[] \
> __attribute__((section("__ksymtab_strings"))) \
> = MODULE_SYMBOL_PREFIX #sym; \
> static const struct kernel_symbol __ksymtab_##sym \
> __attribute_used__ \
> __attribute__((section("__ksymtab" sec), unused)) \
> = { (unsigned long)&sym, __kstrtab_##sym }
>
>
> please throw some light here for me to understand this complex
> substitution,
> Also, EXPORT_SYMBOL_GPL seems to be a way to letting the modules Only under
> GPL License
> (MODULE_VERSION("GPL")) to be able to use the exported symbols ?
>
>
> Thanks,
> ~amit
>
> --
> "Everyone has a photographic memory. Some people just don't have film."
>
> — Mel Brooks
>
--
"Everyone has a photographic memory. Some people just don't have film."
— Mel Brooks
