[PATCH AUTOSEL for 4.14 023/100] s390/topology: fix compile error in file arch/s390/kernel/smp.c

[Sasha Levin]

From: Thomas Richter <tmricht@xxxxxxxxxxxxxxxxxx>

[ 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 âsmp_start_secondaryâ:
arch/s390/kernel/smp.c:812:6: error: implicit declaration of function
	âtopology_cpu_dedicatedâ; did you mean âtopology_cpu_initâ?

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@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 arch/s390/include/asm/topology.h | 1 +
 arch/s390/kernel/smp.c           | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h
index 55de4eb73604..de0a8b17bcaa 100644
--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -51,6 +51,7 @@ const struct cpumask *cpu_coregroup_mask(int cpu);
 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 */
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 092c4154abd7..7ffaf9fd6d19 100644
--- 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 {
-- 
2.11.0