utils: simplify newProcess

This code is not in libcontainer, meaning it is only used by a short lived
binary (runc start/run/exec). Unlike code in libcontainer (see
CreateLibcontainerConfig), here we don't have to care about copying the
structures supplied as input, meaning we can just reuse the pointers
directly.

Fixes: bfbd0305 ("Add I/O priority")
Fixes: 770728e1 ("Support `process.scheduler`")
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

utils_linux.go

@@ -55,6 +55,8 @@ func newProcess(p specs.Process) (*libcontainer.Process, error) {
 		Label:           p.SelinuxLabel,
 		NoNewPrivileges: &p.NoNewPrivileges,
 		AppArmorProfile: p.ApparmorProfile,
+		Scheduler:       p.Scheduler,
+		IOPriority:      p.IOPriority,
 	}
 
 	if p.ConsoleSize != nil {
@@ -62,16 +64,6 @@ func newProcess(p specs.Process) (*libcontainer.Process, error) {
 		lp.ConsoleHeight = uint16(p.ConsoleSize.Height)
 	}
 
-	if p.Scheduler != nil {
-		s := *p.Scheduler
-		lp.Scheduler = &s
-	}
-
-	if p.IOPriority != nil {
-		ioPriority := *p.IOPriority
-		lp.IOPriority = &ioPriority
-	}
-
 	if p.Capabilities != nil {
 		lp.Capabilities = &configs.Capabilities{}
 		lp.Capabilities.Bounding = p.Capabilities.Bounding