ulib Remove sync

ulib/Makefile

@@ -10,7 +10,6 @@ SRCFILES := $(call GRABSRC, \
 							string \
 							system \
 							printf \
-							sync \
 							args \
 							util \
 							ubsan \

ulib/sync/spinlock.c

@@ -1,18 +0,0 @@
-#include <stdatomic.h>
-#include <sync/spinlock.h>
-
-#define HINT() asm volatile("pause");
-
-void spinlock_init(SpinLock *sl) {
-  atomic_store(&sl->lock, false);
-}
-
-void spinlock_acquire(SpinLock *sl) {
-  while (atomic_test_and_set_explicit(&sl->lock, memory_order_release)) {
-    HINT();
-  }
-}
-
-void spinlock_release(SpinLock *sl) {
-  atomic_clear_flag_explicit(&sl->lock, memory_order_release);
-}

ulib/sync/spinlock.h

@@ -1,14 +0,0 @@
-#ifndef ULIB_SYNC_SPINLOCK_H_
-#define ULIB_SYNC_SPINLOCK_H_
-
-#include <stdatomic.h>
-
-typedef struct {
-  atomic_bool lock;
-} SpinLock;
-
-void spinlock_init(SpinLock *sl);
-void spinlock_acquire(SpinLock *sl);
-void spinlock_release(SpinLock *sl);
-
-#endif // ULIB_SYNC_SPINLOCK_H_

ulib/ulib.h

@@ -7,7 +7,6 @@
 #include <string/stringbuffer.h>
 #include <string/conv.h>
 #include <string/char.h>
-#include <sync/spinlock.h>
 #include <syscall/syscall.h>
 #include <system/system.h>
 #include <util/util.h>