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authorhawkes@sgi.com <hawkes@sgi.com>2005-11-18 11:30:34 -0800
committerTony Luck <tony.luck@intel.com>2005-11-21 14:15:42 -0800
commit090de0b77ceed1f1d05883fa744760f0c65d9c31 (patch)
tree531288885c524904bf5baa4e7dadc4048fee3fd9
parent9ad4f924ecd9c067a22a64699bcf4eaad1935a61 (diff)
downloadop-kernel-dev-090de0b77ceed1f1d05883fa744760f0c65d9c31.zip
op-kernel-dev-090de0b77ceed1f1d05883fa744760f0c65d9c31.tar.gz
[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>
-rw-r--r--arch/ia64/sn/kernel/sn2/sn_hwperf.c3
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 6c6fbca..19b54fb 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;
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