x86: Use .cfi_sections for assembly code
The newer assemblers support the .cfi_sections directive so we can put the CFI from .S files into the .debug_frame section that is preserved in unstripped vmlinux and in separate debuginfo, rather than the .eh_frame section that is now discarded by vmlinux.lds.S. Signed-off-by: NRoland McGrath <roland@redhat.com> LKML-Reference: <20100514044303.A6FE7400BE@magilla.sf.frob.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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