fix spinlock (#14068)

1 files changed, 4 insertions, 7 deletions

diff --git a/libnetdata/locks/locks.c b/libnetdata/locks/locks.c
index 9bf56e9f58..f7191be52c 100644
--- a/libnetdata/locks/locks.c
+++ b/libnetdata/locks/locks.c
@@ -287,17 +287,15 @@ void netdata_spinlock_init(SPINLOCK *spinlock) {
 }
 
 void netdata_spinlock_lock(SPINLOCK *spinlock) {
-    netdata_thread_disable_cancelability();
-
     static const struct timespec ns = { .tv_sec = 0, .tv_nsec = 1 };
-    bool expected = false, desired = true;
+
+    netdata_thread_disable_cancelability();
 
     for(int i = 1;
         __atomic_load_n(&spinlock->locked, __ATOMIC_RELAXED) ||
-        !__atomic_compare_exchange_n(&spinlock->locked, &expected, desired, false, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE)
+        __atomic_test_and_set(&spinlock->locked, __ATOMIC_ACQUIRE)
         ; i++
         ) {
-
         if(unlikely(i == 8)) {
             i = 0;
             nanosleep(&ns, NULL);
@@ -307,8 +305,7 @@ void netdata_spinlock_lock(SPINLOCK *spinlock) {
 }
 
 void netdata_spinlock_unlock(SPINLOCK *spinlock) {
-    __atomic_store_n(&spinlock->locked, false, __ATOMIC_RELEASE);
-
+    __atomic_clear(&spinlock->locked, __ATOMIC_RELEASE);
     netdata_thread_enable_cancelability();
 }