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s390/topology: correct allocation of topology information 

The data stored by the STSI instruction can be up to a page in size
but the memblock_virt_alloc allocation for tl_info only specifies
16 bytes. The memory after the short allocation is overwritten
every time arch_update_cpu_topology is called.

Fixes: 8c91058022 "s390/numa: establish cpu to node mapping early"
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2017-02-04 12:38:12 +01:00
parent da8fd820f3
commit 8676caa4fb
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kernel/topology.c
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@ -458,7 +458,7 @@ void __init topology_init_early(void)
set_sched_topology(s390_topology);
if (!MACHINE_HAS_TOPOLOGY)
goto out;
tl_info = memblock_virt_alloc(sizeof(*tl_info), PAGE_SIZE);
tl_info = memblock_virt_alloc(PAGE_SIZE, PAGE_SIZE);
info = tl_info;
store_topology(info);
pr_info("The CPU configuration topology of the machine is: %d %d %d %d %d %d / %d\n",