.../RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c | 6 ++++++ 1 file changed, 6 insertions(+)
The new VS2012 build failure is caused by 7a0df26.
xxx\registercpufeatureslib\dxeregistercpufeatureslib.c(258) :
warning C4701: potentially uninitialized local variable 'MpEvent' used
It is a false positive alarm.
MpEvent is assigned at line 238 and will be used at line 258, both
lines are controlled by "if (CpuFeaturesData->NumberOfCpus > 1)".
This patch initializes MpEvent to suppress incorrect compiler/analyzer
warnings.
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Dandan Bi <dandan.bi@intel.com>
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
.../RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c
index ffd99046a6cd..f87b2892aaae 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c
@@ -229,6 +229,12 @@ CpuFeaturesInitialize (
OldBspNumber = GetProcessorIndex (CpuFeaturesData);
CpuFeaturesData->BspNumber = OldBspNumber;
+ //
+ //
+ // Initialize MpEvent to suppress incorrect compiler/analyzer warnings.
+ //
+ MpEvent = NULL;
+
if (CpuFeaturesData->NumberOfCpus > 1) {
Status = gBS->CreateEvent (
EVT_NOTIFY_WAIT,
--
2.21.0.windows.1
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Reviewed-by: Eric Dong <eric.dong@intel.com> > -----Original Message----- > From: Zeng, Star > Sent: Wednesday, July 17, 2019 11:23 AM > To: devel@edk2.groups.io > Cc: Zeng, Star <star.zeng@intel.com>; Laszlo Ersek <lersek@redhat.com>; > Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Bi, Dandan > <dandan.bi@intel.com> > Subject: [PATCH] UefiCpuPkg DxeRegisterCpuFeaturesLib: Fix VS2012 build > failure > > The new VS2012 build failure is caused by 7a0df26. > > xxx\registercpufeatureslib\dxeregistercpufeatureslib.c(258) : > warning C4701: potentially uninitialized local variable 'MpEvent' used > > It is a false positive alarm. > MpEvent is assigned at line 238 and will be used at line 258, both lines are > controlled by "if (CpuFeaturesData->NumberOfCpus > 1)". > > This patch initializes MpEvent to suppress incorrect compiler/analyzer > warnings. > > Cc: Laszlo Ersek <lersek@redhat.com> > Cc: Eric Dong <eric.dong@intel.com> > Cc: Ray Ni <ray.ni@intel.com> > Cc: Dandan Bi <dandan.bi@intel.com> > Signed-off-by: Star Zeng <star.zeng@intel.com> > --- > .../RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git > a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c > b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c > index ffd99046a6cd..f87b2892aaae 100644 > --- > a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c > +++ > b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLi > +++ b.c > @@ -229,6 +229,12 @@ CpuFeaturesInitialize ( > OldBspNumber = GetProcessorIndex (CpuFeaturesData); > CpuFeaturesData->BspNumber = OldBspNumber; > > + // > + // > + // Initialize MpEvent to suppress incorrect compiler/analyzer warnings. > + // > + MpEvent = NULL; > + > if (CpuFeaturesData->NumberOfCpus > 1) { > Status = gBS->CreateEvent ( > EVT_NOTIFY_WAIT, > -- > 2.21.0.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#43838): https://edk2.groups.io/g/devel/message/43838 Mute This Topic: https://groups.io/mt/32499927/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=-=-=-=-=-=-=-=-=-=-=-
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