Question about EXPORT_SYMBOL implementation

["Francis Moreau" <francis.moro@gmail.com>]

Hi,

Here is the implementation of EXPORT_SYMBOL:

#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 }


I'm wondering why it's using '__attribute_used__' _and_
'__attribute__((section("__ksymtab" sec), unused)'. Isn't the unused
attribute redundant with '__attribute_used__' ?

thanks
--
Francis
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