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%3Ba=su...

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