Patch "s390/topology: fix compile error in file arch/s390/kernel/smp.c" has been added to the 4.14-stable tree

Patch "s390/topology: fix compile error in file arch/s390/kernel/smp.c" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    s390/topology: fix compile error in file arch/s390/kernel/smp.c

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     s390-topology-fix-compile-error-in-file-arch-s390-kernel-smp.c.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Feb  1 13:45:42 CET 2018
From: Thomas Richter <tmricht@linux.vnet.ibm.com>
Date: Thu, 16 Nov 2017 14:26:36 +0100
Subject: s390/topology: fix compile error in file arch/s390/kernel/smp.c

From: Thomas Richter <tmricht@linux.vnet.ibm.com>


[ Upstream commit 38389ec84e835fa31a59b7dabb18343106a6d0d5 ]

Commit 1887aa07b676
("s390/topology: add detection of dedicated vs shared CPUs")
introduced following compiler error when CONFIG_SCHED_TOPOLOGY is not set.

 CC      arch/s390/kernel/smp.o
...
arch/s390/kernel/smp.c: In function ‘smp_start_secondary’:
arch/s390/kernel/smp.c:812:6: error: implicit declaration of function
	‘topology_cpu_dedicated’; did you mean ‘topology_cpu_init’?

This patch fixes the compiler error by adding function
topology_cpu_dedicated() to return false when this config option is
not defined.

Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/s390/include/asm/topology.h |    1 +
 arch/s390/kernel/smp.c           |    1 +
 2 files changed, 2 insertions(+)

--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -51,6 +51,7 @@ const struct cpumask *cpu_coregroup_mask
 static inline void topology_init_early(void) { }
 static inline void topology_schedule_update(void) { }
 static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
+static inline int topology_cpu_dedicated(int cpu_nr) { return 0; }
 static inline void topology_expect_change(void) { }
 
 #endif /* CONFIG_SCHED_TOPOLOGY */
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -54,6 +54,7 @@
 #include <asm/sigp.h>
 #include <asm/idle.h>
 #include <asm/nmi.h>
+#include <asm/topology.h>
 #include "entry.h"
 
 enum {


Patches currently in stable-queue which might be from tmricht@linux.vnet.ibm.com are

queue-4.14/s390-topology-fix-compile-error-in-file-arch-s390-kernel-smp.c.patch