linux-kernel - [PATCH 4.9 166/206] s390/topology: always use s390 specific sched_domain_topology

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Date:   Tue, 10 Jan 2017 14:37:29 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Heiko Carstens <heiko.carstens@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: [PATCH 4.9 166/206] s390/topology: always use s390 specific sched_domain_topology_level

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Heiko Carstens <heiko.carstens@...ibm.com>

commit ebb299a51059017ec253bd30781a83d1f6e11b24 upstream.

The s390 specific sched_domain_topology_level should always be used,
not only if the machine provides topology information. Luckily this
odd behaviour, that was by accident introduced with git commit
d05d15da18f5 ("s390/topology: delay initialization of topology cpu
masks") has currently no side effect.

Fixes: d05d15da18f5 ("s390/topology: delay initialization of topology cpumasks")
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/s390/kernel/topology.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -448,6 +448,7 @@ static int __init s390_topology_init(voi
 	struct sysinfo_15_1_x *info;
 	int i;
 
+	set_sched_topology(s390_topology);
 	if (!MACHINE_HAS_TOPOLOGY)
 		return 0;
 	tl_info = (struct sysinfo_15_1_x *)__get_free_page(GFP_KERNEL);
@@ -460,7 +461,6 @@ static int __init s390_topology_init(voi
 	alloc_masks(info, &socket_info, 1);
 	alloc_masks(info, &book_info, 2);
 	alloc_masks(info, &drawer_info, 3);
-	set_sched_topology(s390_topology);
 	return 0;
 }
 early_initcall(s390_topology_init);