[PATCH] RISC-V: cpu_ops_spinwait.c should include head.h

[Ben Dooks]

Running sparse shows cpu_ops_spinwait.c is missing two definitions
found in head.h, so include it to stop the following warnings:

arch/riscv/kernel/cpu_ops_spinwait.c:15:6: warning: symbol '__cpu_spinwait_stack_pointer' was not declared. Should it be static?
arch/riscv/kernel/cpu_ops_spinwait.c:16:6: warning: symbol '__cpu_spinwait_task_pointer' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks at sifive.com>
---
 arch/riscv/kernel/cpu_ops_spinwait.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/kernel/cpu_ops_spinwait.c b/arch/riscv/kernel/cpu_ops_spinwait.c
index 346847f6c41c..c662a7cf10a4 100644
--- a/arch/riscv/kernel/cpu_ops_spinwait.c
+++ b/arch/riscv/kernel/cpu_ops_spinwait.c
@@ -11,6 +11,8 @@
 #include <asm/sbi.h>
 #include <asm/smp.h>
 
+#include "head.h"
+
 const struct cpu_operations cpu_ops_spinwait;
 void *__cpu_spinwait_stack_pointer[NR_CPUS] __section(".data");
 void *__cpu_spinwait_task_pointer[NR_CPUS] __section(".data");
-- 
2.35.1