MdeModulePkg DxeIpl: Fix IA32 build failure with GCC 5.1.1

Got the build failure feedback below, this patch is to fix that.

This broke the IA32 Ovmf build for me, with GCC 5.1.1 (Fedora 22):

/home/dwmw2/git/edk2/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c:377:7:
error: ‘PageTables’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
       AsmWriteCr3 (PageTables);
       ^
/home/dwmw2/git/edk2/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c:224:9:
note: ‘PageTables’ was declared here
   UINTN                     PageTables;
         ^
cc1: all warnings being treated as errors

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Qiu Shumin <shumin.qiu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18190 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c b/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
index c1ff4b7e64340526485ed7d6467f15834e5c70f3..8ce72cb31659fb2faf972bb04e01dee5d313c91c 100644 (file)
--- a/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
+++ b/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
@@ -361,6 +361,7 @@ HandOffToDxeCore (
     TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;\r
     TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r
 \r
+    PageTables = 0;\r
     BuildPageTablesIa32Pae = (BOOLEAN) (PcdGetBool (PcdSetNxForStack) && IsIa32PaeSupport () && IsExecuteDisableBitAvailable ());\r
     if (BuildPageTablesIa32Pae) {\r
       PageTables = Create4GPageTablesIa32Pae (BaseOfStack, STACK_SIZE);\r