[PATCH 4/6] ntoskrnl.exe: Implement KeReleaseSpinLock().

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 dlls/ntoskrnl.exe/ntoskrnl.c        |  8 --------
 dlls/ntoskrnl.exe/ntoskrnl.exe.spec |  2 +-
 dlls/ntoskrnl.exe/sync.c            | 11 +++++++++++
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index a76d0413f8..26668408a6 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -3868,14 +3868,6 @@ KIRQL WINAPI KeAcquireSpinLockRaiseToDpc(KSPIN_LOCK *spinlock)
     return 0;
 }

-/***********************************************************************
- *           KeReleaseSpinLock (NTOSKRNL.EXE.@)
- */
-void WINAPI KeReleaseSpinLock( KSPIN_LOCK *spinlock, KIRQL irql )
-{
-    FIXME( "stub: %p %u\n", spinlock, irql );
-}
-
 /***********************************************************************
  *           IoCreateNotificationEvent (NTOSKRNL.EXE.@)
  */
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 992679c70d..c4a4213287 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -593,7 +593,7 @@
 @ stub KeReleaseMutant
 @ stdcall KeReleaseMutex(ptr long)
 @ stdcall KeReleaseSemaphore(ptr long long long)
-@ stdcall KeReleaseSpinLock(ptr long)
+@ stdcall -arch=arm,arm64,x86_64 KeReleaseSpinLock(ptr long)
 @ stub KeReleaseSpinLockFromDpcLevel
 @ stub KeRemoveByKeyDeviceQueue
 @ stub KeRemoveByKeyDeviceQueueIfBusy
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index bd58f33258..832b0480b9 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -382,3 +382,14 @@ void WINAPI KeInitializeSpinLock( KSPIN_LOCK *lock )
     TRACE("lock %p.\n", lock);
     *lock = 0;
 }
+
+#ifndef __i386__
+/***********************************************************************
+ *           KeReleaseSpinLock (NTOSKRNL.EXE.@)
+ */
+void WINAPI KeReleaseSpinLock( KSPIN_LOCK *lock, KIRQL irql )
+{
+    TRACE("lock %p, irql %u.\n", lock, irql);
+    InterlockedExchangePointer( (void **)lock, 0 );
+}
+#endif