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UefiCpuPkg/PiSmmCpuDxeSmm: Add volatile to mNumberToFinish 

Add volatile qualifier to mNumberToFinish to prevent GCC 5.4
compiler from optimizing away required logic in ACPI S3 resume.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Jeff Fan <jeff.fan@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
This commit is contained in:
Michael Kinney 2016-11-17 12:43:04 -08:00
parent 672b80c8b7
commit c773514d45
1 changed files with 1 additions and 1 deletions
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UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
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@ -55,7 +55,7 @@ AsmGetAddressMap (
#define LEGACY_REGION_BASE (0xA0000 - LEGACY_REGION_SIZE)
ACPI_CPU_DATA mAcpiCpuData;
UINT32 mNumberToFinish;
volatile UINT32 mNumberToFinish;
MP_CPU_EXCHANGE_INFO *mExchangeInfo;
BOOLEAN mRestoreSmmConfigurationInS3 = FALSE;
VOID *mGdtForAp = NULL;