[PATCH v2 1/1] win32u: Fix data race in NtUserGetProcessDpiAwarenessContext.

[Jinoh Kang]

From: Jinoh Kang

---
 dlls/win32u/sysparams.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c
index 494bb94c7f1..f90648db7fc 100644
--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -5326,14 +5326,17 @@ BOOL WINAPI NtUserSetProcessDpiAwarenessContext( ULONG awareness, ULONG unknown
  */
 ULONG WINAPI NtUserGetProcessDpiAwarenessContext( HANDLE process )
 {
+    DPI_AWARENESS val;
+
     if (process && process != GetCurrentProcess())
     {
         WARN( "not supported on other process %p\n", process );
         return NTUSER_DPI_UNAWARE;
     }

-    if (!dpi_awareness) return NTUSER_DPI_UNAWARE;
-    return dpi_awareness;
+    val = ReadNoFence( &dpi_awareness );
+    if (!val) return NTUSER_DPI_UNAWARE;
+    return val;
 }

BOOL message_beep( UINT i )