Dynamic IRQ handling

kernel/sync/spinlock.c

@@ -32,7 +32,10 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <libk/stdatomic.h>
 #include <libk/string.h>
 #include <sync/spinlock.h>
-#include <sys/cpu.h>
+
+#if defined(__i386__)
+  #include <sys/cpu.h>
+#endif
 
 void sl_init(struct spinlock *sl, const char *name) {
   if (strlen(name) > SPINLOCK_NAME_MAX) {
@@ -46,7 +49,9 @@ void sl_init(struct spinlock *sl, const char *name) {
 void sl_lock(struct spinlock *sl) {
   intr_save();
   while (atomic_flag_test_and_set_explicit(&sl->flag, memory_order_acquire)) {
+#if defined(__i386__)
     cpu_relax();
+#endif
   }
 }