Merge pull request #3111 from BernardXiong/spin_lock

Add spin lock API in Kernel

1 files changed, 6 insertions, 0 deletions

diff --git a/libcpu/arm/cortex-a/cpu.c b/libcpu/arm/cortex-a/cpu.c
index 6b129f89ee..7c6bf58a4b 100644
--- a/libcpu/arm/cortex-a/cpu.c
+++ b/libcpu/arm/cortex-a/cpu.c
@@ -14,6 +14,7 @@
 #include <board.h>
 
 #ifdef RT_USING_SMP
+
 int rt_hw_cpu_id(void)
 {
     int cpu_id;
@@ -25,6 +26,11 @@ int rt_hw_cpu_id(void)
     return cpu_id;
 };
 
+void rt_hw_spin_lock_init(rt_hw_spinlock_t *lock)
+{
+    lock->slock = 0;
+}
+
 void rt_hw_spin_lock(rt_hw_spinlock_t *lock)
 {
     unsigned long tmp;