Kernel: Do not wait before first attempt at locking SpinLock (Serenit…

…yOS#3212)
lanmonster · Aug 19, 2020 · 983f4f9 · 983f4f9
1 parent c711d34
commit 983f4f9
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/Kernel/SpinLock.h b/Kernel/SpinLock.h
@@ -45,11 +45,11 @@ class SpinLock {
  {
  u32 prev_flags;
  Processor::current().enter_critical(prev_flags);
- BaseType expected;
- do {
+ BaseType expected = 0;
+ while (!m_lock.compare_exchange_strong(expected, 1, AK::memory_order_acq_rel)) {
  Processor::wait_check();
  expected = 0;
- } while (!m_lock.compare_exchange_strong(expected, 1, AK::memory_order_acq_rel));
+ }
  return prev_flags;
  }