[IA64] fix bug in sn/ia64 for sparse CPU numbering

The kernel's use of the for_each_*cpu(i) macros has allowed for sparse CPU
numbering.  When I hacked the kernel to test sparse cpu_present_map[] and
cpu_possible_map[] cpumasks, I discovered one remaining spot, in
sn_hwperf_ioctl() during sn initialization, that needs to be fixed.

Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Dean Roe <roe@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 6c6fbca3229c..19b54fbcd7ea 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -743,13 +743,14 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
                 if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) {
                         memset(p, 0, a.sz);
                         for (i = 0; i < nobj; i++) {
+                                int cpuobj_index = 0;
                                 if (!SN_HWPERF_IS_NODE(objs + i))
                                         continue;
                                 node = sn_hwperf_obj_to_cnode(objs + i);
                                 for_each_online_cpu(j) {
                                         if (node != cpu_to_node(j))
                                                 continue;
-                                        cpuobj = (struct sn_hwperf_object_info *) p + j;
+                                        cpuobj = (struct sn_hwperf_object_info *) p + cpuobj_index++;
                                         slice = 'a' + cpuid_to_slice(j);
                                         cdata = cpu_data(j);
                                         cpuobj->id = j;