[PATCH] sched/numa: fix build without CONFIG_NUMA_BALANCING

[Arnd Bergmann]

I ran into a build error:

kernel/sched/fair.c:2655:44: error: 'struct sched_domain' declared inside 
parameter list will not be visible outside of this definition or declaration 
[-Werror]

Adding a forward declaration for the struct name is sufficient
to avoid it.

Fixes: 3fed382b46ba ("sched/numa: Implement NUMA node level wake_affine()")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 kernel/sched/fair.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 6f4f155adf5f..eea8f0b7d9c0 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2652,6 +2652,7 @@ static inline void account_numa_dequeue(struct rq *rq, 
struct task_struct *p)
 {
 }
 
+struct sched_domain;
 static inline bool numa_wake_affine(struct sched_domain *sd,
                                    struct task_struct *p, int this_cpu,
                                    int prev_cpu, int sync)
-- 
2.9.0