Staging: hv: osd: remove MemoryFence wrapper

Use the "real" mb call instead of a wrapper function.

Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 3 insertions, 10 deletions

diff --git a/drivers/staging/hv/RingBuffer.c b/drivers/staging/hv/RingBuffer.c
index 21fc4cc6326..e99546835f2 100644
--- a/drivers/staging/hv/RingBuffer.c
+++ b/drivers/staging/hv/RingBuffer.c
@@ -411,7 +411,7 @@ RingBufferWrite(
                                                                                                 sizeof(u64));
 
         // Make sure we flush all writes before updating the writeIndex
-        MemoryFence();
+        mb();
 
         // Now, update the write location
         SetNextWriteLocation(OutRingInfo, nextWriteLocation);
@@ -532,7 +532,7 @@ RingBufferRead(
 
         // Make sure all reads are done before we update the read index since
         // the writer may start writing to the read area once the read index is updated
-        MemoryFence();
+        mb();
 
         // Update the read index
         SetNextReadLocation(InRingInfo, nextReadLocation);
diff --git a/drivers/staging/hv/Vmbus.c b/drivers/staging/hv/Vmbus.c
index 4ad40be0bdf..72bb08f2439 100644
--- a/drivers/staging/hv/Vmbus.c
+++ b/drivers/staging/hv/Vmbus.c
@@ -426,7 +426,7 @@ VmbusOnMsgDPC(
                 // Make sure the write to MessageType (ie set to HvMessageTypeNone) happens
                 // before we read the MessagePending and EOMing. Otherwise, the EOMing will not deliver
                 // any more messages since there is no empty slot
-                MemoryFence();
+                mb();
 
                 if (msg->Header.MessageFlags.MessagePending)
                 {
diff --git a/drivers/staging/hv/include/osd.h b/drivers/staging/hv/include/osd.h
index 504d585e713..467196d0044 100644
--- a/drivers/staging/hv/include/osd.h
+++ b/drivers/staging/hv/include/osd.h
@@ -119,8 +119,6 @@ extern void PageFree(void* page, unsigned int count);
 extern void* MemMapIO(unsigned long phys, unsigned long size);
 extern void MemUnmapIO(void* virt);
 
-extern void MemoryFence(void);
-
 extern HANDLE TimerCreate(PFN_TIMER_CALLBACK pfnTimerCB, void* context);
 extern void TimerClose(HANDLE hTimer);
 extern int TimerStop(HANDLE hTimer);
diff --git a/drivers/staging/hv/osd.c b/drivers/staging/hv/osd.c
index 0c2ad4916cb..7a4c4381fd4 100644
--- a/drivers/staging/hv/osd.c
+++ b/drivers/staging/hv/osd.c
@@ -197,11 +197,6 @@ void MemUnmapIO(void *virt)
         //iounmap(virt);
 }
 
-void MemoryFence()
-{
-        mb();
-}
-
 void TimerCallback(unsigned long data)
 {
         TIMER* t = (TIMER*)data;