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sparc64: Do not clobber %g2 in xcall_fetch_glob_regs().
%g2 is meant to hold the CPUID number throughout this routine, since at the very beginning, and at the very end, we use %g2 to calculate indexes into per-cpu arrays. However we erroneously clobber it in order to hold the %cwp register value mid-stream. Fix this code to use %g3 for the %cwp read and related calulcations instead. Reported-by: Meelis Roos <email@example.com> Signed-off-by: David S. Miller <firstname.lastname@example.org>
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