libct/cg/fs2: fix some revive linter warnings

These:

> Error: libcontainer/cgroups/fs2/cpu.go:15:6: var-naming: func isCpuSet should be isCPUSet (revive)
> func isCpuSet(r *cgroups.Resources) bool {
>      ^
> Error: libcontainer/cgroups/fs2/cpu.go:19:6: var-naming: func setCpu should be setCPU (revive)
> func setCpu(dirPath string, r *cgroups.Resources) error {
>      ^

They are going to be shown after next commits because of linter-extra CI
job (which, due to major changes, now thinks it's a new code so extra
linters apply).

Fixing it beforehand.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

libcontainer/cgroups/fs2/cpu.go

@@ -13,12 +13,12 @@ import (
 	"github.com/opencontainers/runc/libcontainer/configs"
 )
 
-func isCpuSet(r *configs.Resources) bool {
+func isCPUSet(r *configs.Resources) bool {
 	return r.CpuWeight != 0 || r.CpuQuota != 0 || r.CpuPeriod != 0 || r.CPUIdle != nil || r.CpuBurst != nil
 }
 
-func setCpu(dirPath string, r *configs.Resources) error {
-	if !isCpuSet(r) {
+func setCPU(dirPath string, r *configs.Resources) error {
+	if !isCPUSet(r) {
 		return nil
 	}
 

libcontainer/cgroups/fs2/create.go

@@ -48,7 +48,7 @@ func needAnyControllers(r *configs.Resources) (bool, error) {
 	if isIoSet(r) && have("io") {
 		return true, nil
 	}
-	if isCpuSet(r) && have("cpu") {
+	if isCPUSet(r) && have("cpu") {
 		return true, nil
 	}
 	if isCpusetSet(r) && have("cpuset") {
@@ -65,7 +65,7 @@ func needAnyControllers(r *configs.Resources) (bool, error) {
 // Refer to: http://man7.org/linux/man-pages/man7/cgroups.7.html
 // As at Linux 4.19, the following controllers are threaded: cpu, perf_event, and pids.
 func containsDomainController(r *configs.Resources) bool {
-	return isMemorySet(r) || isIoSet(r) || isCpuSet(r) || isHugeTlbSet(r)
+	return isMemorySet(r) || isIoSet(r) || isCPUSet(r) || isHugeTlbSet(r)
 }
 
 // CreateCgroupPath creates cgroupv2 path, enabling all the supported controllers.

libcontainer/cgroups/fs2/fs2.go

@@ -182,7 +182,7 @@ func (m *Manager) Set(r *configs.Resources) error {
 		return err
 	}
 	// cpu (since kernel 4.15)
-	if err := setCpu(m.dirPath, r); err != nil {
+	if err := setCPU(m.dirPath, r); err != nil {
 		return err
 	}
 	// devices (since kernel 4.15, pseudo-controller)