Zebediah Figura : ntoskrnl.exe: Implement KeReleaseSpinLockFromDpcLevel().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a1dfdfaf22c24524f26dad720fceaf421ec6bb78
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=a1dfdfaf22c24524f26dad720fceaf421ec6bb78

Author: Zebediah Figura <z.figura12 at gmail.com>
Date:   Sun Jan 27 20:45:31 2019 -0600

ntoskrnl.exe: Implement KeReleaseSpinLockFromDpcLevel().

Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntoskrnl.exe/ntoskrnl.exe.spec |  2 +-
 dlls/ntoskrnl.exe/sync.c            | 11 ++++++++++-
 include/ddk/wdm.h                   |  1 +
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index bf87504..47ce683 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -594,7 +594,7 @@
 @ stdcall KeReleaseMutex(ptr long)
 @ stdcall KeReleaseSemaphore(ptr long long long)
 @ stdcall -arch=arm,arm64,x86_64 KeReleaseSpinLock(ptr long)
-@ stub KeReleaseSpinLockFromDpcLevel
+@ stdcall KeReleaseSpinLockFromDpcLevel(ptr)
 @ stub KeRemoveByKeyDeviceQueue
 @ stub KeRemoveByKeyDeviceQueueIfBusy
 @ stub KeRemoveDeviceQueue
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index 475fcf1..b439695 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -386,7 +386,6 @@ void WINAPI KeInitializeSpinLock( KSPIN_LOCK *lock )
     *lock = 0;
 }
 
-#ifndef __i386__
 static inline void small_pause(void)
 {
 #ifdef __x86_64__
@@ -397,6 +396,16 @@ static inline void small_pause(void)
 }
 
 /***********************************************************************
+ *           KeReleaseSpinLockFromDpcLevel (NTOSKRNL.EXE.@)
+ */
+void WINAPI KeReleaseSpinLockFromDpcLevel( KSPIN_LOCK *lock )
+{
+    TRACE("lock %p.\n", lock);
+    InterlockedExchangePointer( (void **)lock, 0 );
+}
+
+#ifndef __i386__
+/***********************************************************************
  *           KeReleaseSpinLock (NTOSKRNL.EXE.@)
  */
 void WINAPI KeReleaseSpinLock( KSPIN_LOCK *lock, KIRQL irql )
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index a53c7a2..25d7da8 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1443,6 +1443,7 @@ ULONG     WINAPI KeQueryTimeIncrement(void);
 LONG      WINAPI KeReleaseMutex(PRKMUTEX,BOOLEAN);
 LONG      WINAPI KeReleaseSemaphore(PRKSEMAPHORE,KPRIORITY,LONG,BOOLEAN);
 void      WINAPI KeReleaseSpinLock(KSPIN_LOCK*,KIRQL);
+void      WINAPI KeReleaseSpinLockFromDpcLevel(KSPIN_LOCK*);
 LONG      WINAPI KeResetEvent(PRKEVENT);
 LONG      WINAPI KeSetEvent(PRKEVENT,KPRIORITY,BOOLEAN);
 KPRIORITY WINAPI KeSetPriorityThread(PKTHREAD,KPRIORITY);