[PATCH] ppc64: setup cpu_sibling_map on iSeries

Nathan Lynch pointed this out: The CPU sibling map is never initialized on
iSeries.  This makes the scheduler very unhappy if CONFIG_SCHED_SMT is
enabled, causing an oops in find_busiest_group during boot.

Below patch adds the expected init.
Signed-off-by: Olof Johansson <olof@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/iSeries_smp.c

@@ -94,6 +94,7 @@ static int smp_iSeries_numProcs(void)
                 if (paca[i].lppaca.xDynProcStatus < 2) {
 			cpu_set(i, cpu_possible_map);
 			cpu_set(i, cpu_present_map);
+			cpu_set(i, cpu_sibling_map[i]);
                         ++np;
                 }
         }