[PATCH] ppc64 cpu hotplug and SMT

[jschopp at austin.ibm.com]

With SMT we need to reserve possible cpu slots for each SMT thread and not
just for each cpu.  The patch below fixes that.  If there are no
objections please put into ameslab and send upstream.

--- ameslab-current/arch/ppc64/kernel/smp.c	2004-05-05 15:37:08.000000000 -0500
+++ new/arch/ppc64/kernel/smp.c	2004-05-05 15:37:49.000000000 -0500
@@ -463,6 +463,9 @@ static inline void look_for_more_cpus(vo
 		       maxcpus);

 	/* Make those cpus (which might appear later) possible too. */
+	if ((naca->smt_state == SMT_ON) || (naca->smt_state == SMT_DYNAMIC)) {
+		maxcpus *= 2;
+	}
 	for (i = 0; i < maxcpus; i++)
 		cpu_set(i, cpu_possible_map);
 }


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