cpu: unexport HWCap and HWCap2

These are an implementation detail and should not have been
exported. This only affects Linux on platforms other than 386 and
amd64.

Fixes golang/go#30255.

Change-Id: Ib23b42a7309fd6093b6b9d8b6628de222a3928be
Reviewed-on: https://go-review.googlesource.com/c/163004
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

cpu/cpu_linux.go

@@ -22,8 +22,8 @@ const (
 // For those platforms don't have a 'cpuid' equivalent we use HWCAP/HWCAP2
 // These are initialized in cpu_$GOARCH.go
 // and should not be changed after they are initialized.
-var HWCap uint
-var HWCap2 uint
+var hwCap uint
+var hwCap2 uint
 
 func init() {
 	buf, err := ioutil.ReadFile(procAuxv)
@@ -46,9 +46,9 @@ func init() {
 		}
 		switch tag {
 		case _AT_HWCAP:
-			HWCap = val
+			hwCap = val
 		case _AT_HWCAP2:
-			HWCap2 = val
+			hwCap2 = val
 		}
 	}
 	doinit()

cpu/cpu_linux_arm64.go

@@ -36,30 +36,30 @@ const (
 
 func doinit() {
 	// HWCAP feature bits
-	ARM64.HasFP = isSet(HWCap, hwcap_FP)
-	ARM64.HasASIMD = isSet(HWCap, hwcap_ASIMD)
-	ARM64.HasEVTSTRM = isSet(HWCap, hwcap_EVTSTRM)
-	ARM64.HasAES = isSet(HWCap, hwcap_AES)
-	ARM64.HasPMULL = isSet(HWCap, hwcap_PMULL)
-	ARM64.HasSHA1 = isSet(HWCap, hwcap_SHA1)
-	ARM64.HasSHA2 = isSet(HWCap, hwcap_SHA2)
-	ARM64.HasCRC32 = isSet(HWCap, hwcap_CRC32)
-	ARM64.HasATOMICS = isSet(HWCap, hwcap_ATOMICS)
-	ARM64.HasFPHP = isSet(HWCap, hwcap_FPHP)
-	ARM64.HasASIMDHP = isSet(HWCap, hwcap_ASIMDHP)
-	ARM64.HasCPUID = isSet(HWCap, hwcap_CPUID)
-	ARM64.HasASIMDRDM = isSet(HWCap, hwcap_ASIMDRDM)
-	ARM64.HasJSCVT = isSet(HWCap, hwcap_JSCVT)
-	ARM64.HasFCMA = isSet(HWCap, hwcap_FCMA)
-	ARM64.HasLRCPC = isSet(HWCap, hwcap_LRCPC)
-	ARM64.HasDCPOP = isSet(HWCap, hwcap_DCPOP)
-	ARM64.HasSHA3 = isSet(HWCap, hwcap_SHA3)
-	ARM64.HasSM3 = isSet(HWCap, hwcap_SM3)
-	ARM64.HasSM4 = isSet(HWCap, hwcap_SM4)
-	ARM64.HasASIMDDP = isSet(HWCap, hwcap_ASIMDDP)
-	ARM64.HasSHA512 = isSet(HWCap, hwcap_SHA512)
-	ARM64.HasSVE = isSet(HWCap, hwcap_SVE)
-	ARM64.HasASIMDFHM = isSet(HWCap, hwcap_ASIMDFHM)
+	ARM64.HasFP = isSet(hwCap, hwcap_FP)
+	ARM64.HasASIMD = isSet(hwCap, hwcap_ASIMD)
+	ARM64.HasEVTSTRM = isSet(hwCap, hwcap_EVTSTRM)
+	ARM64.HasAES = isSet(hwCap, hwcap_AES)
+	ARM64.HasPMULL = isSet(hwCap, hwcap_PMULL)
+	ARM64.HasSHA1 = isSet(hwCap, hwcap_SHA1)
+	ARM64.HasSHA2 = isSet(hwCap, hwcap_SHA2)
+	ARM64.HasCRC32 = isSet(hwCap, hwcap_CRC32)
+	ARM64.HasATOMICS = isSet(hwCap, hwcap_ATOMICS)
+	ARM64.HasFPHP = isSet(hwCap, hwcap_FPHP)
+	ARM64.HasASIMDHP = isSet(hwCap, hwcap_ASIMDHP)
+	ARM64.HasCPUID = isSet(hwCap, hwcap_CPUID)
+	ARM64.HasASIMDRDM = isSet(hwCap, hwcap_ASIMDRDM)
+	ARM64.HasJSCVT = isSet(hwCap, hwcap_JSCVT)
+	ARM64.HasFCMA = isSet(hwCap, hwcap_FCMA)
+	ARM64.HasLRCPC = isSet(hwCap, hwcap_LRCPC)
+	ARM64.HasDCPOP = isSet(hwCap, hwcap_DCPOP)
+	ARM64.HasSHA3 = isSet(hwCap, hwcap_SHA3)
+	ARM64.HasSM3 = isSet(hwCap, hwcap_SM3)
+	ARM64.HasSM4 = isSet(hwCap, hwcap_SM4)
+	ARM64.HasASIMDDP = isSet(hwCap, hwcap_ASIMDDP)
+	ARM64.HasSHA512 = isSet(hwCap, hwcap_SHA512)
+	ARM64.HasSVE = isSet(hwCap, hwcap_SVE)
+	ARM64.HasASIMDFHM = isSet(hwCap, hwcap_ASIMDFHM)
 }
 
 func isSet(hwc uint, value uint) bool {

cpu/cpu_ppc64x.go

@@ -21,10 +21,10 @@ const (
 
 func doinit() {
 	// HWCAP2 feature bits
-	PPC64.IsPOWER8 = isSet(HWCap2, _PPC_FEATURE2_ARCH_2_07)
-	PPC64.IsPOWER9 = isSet(HWCap2, _PPC_FEATURE2_ARCH_3_00)
-	PPC64.HasDARN = isSet(HWCap2, _PPC_FEATURE2_DARN)
-	PPC64.HasSCV = isSet(HWCap2, _PPC_FEATURE2_SCV)
+	PPC64.IsPOWER8 = isSet(hwCap2, _PPC_FEATURE2_ARCH_2_07)
+	PPC64.IsPOWER9 = isSet(hwCap2, _PPC_FEATURE2_ARCH_3_00)
+	PPC64.HasDARN = isSet(hwCap2, _PPC_FEATURE2_DARN)
+	PPC64.HasSCV = isSet(hwCap2, _PPC_FEATURE2_SCV)
 }
 
 func isSet(hwc uint, value uint) bool {