asmlinkage: Make main_extable_sort_needed visible
main_extable_sort_needed is used by the build system and needs to be a normal ELF symbol. Make it visible so that LTO does not remove or mangle it. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1391845930-28580-8-git-send-email-ak@linux.intel.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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