um: add __weak for exported functions
If the exported glibc functions don't exist, we get link failures. Avoid that by adding __weak so they're allowed to not exist. Reported-by:Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Acked-by:
Randy Dunlap <rdunlap@infradead.org> Tested-by:
Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
Richard Weinberger <richard@nod.at>
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