x86-64: Add prototype for old_rsp to a header file
authorH. J. Lu <hjl.tools@gmail.com>
Tue, 14 Feb 2012 21:49:48 +0000 (13:49 -0800)
committerH. Peter Anvin <hpa@zytor.com>
Mon, 20 Feb 2012 20:48:48 +0000 (12:48 -0800)
So far this has only been used in process_64.c, but the x32 code will
need it in additional code.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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