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Commit 8676caa4 authored by Martin Schwidefsky's avatar Martin Schwidefsky
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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: 8c910580 "s390/numa: establish cpu to node mapping early"
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent da8fd820

arch/s390/kernel/topology.c

+1 −1
Original line number Diff line number Diff line
@@ -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",