libct/cgroupv1/getCgroupMountsHelper: minor nit

kolyshkin · kolyshkin · commit c5ff6ba007e1 · 2020-05-19T16:30:06.000-07:00
It is easy to just use TrimPrefix which does nothing in case the prefix
does not exist.

Signed-off-by: Kir Kolyshkin &lt;kolyshkin@gmail.com&gt;
diff --git a/libcontainer/cgroups/cgroupv1/utils.go b/libcontainer/cgroups/cgroupv1/utils.go
@@ -151,9 +151,7 @@ func getCgroupMountsHelper(ss map[string]bool, mi io.Reader, all bool) ([]Mount,
 				continue
 			}
 			ss[opt] = true
-			if strings.HasPrefix(opt, CgroupNamePrefix) {
-				opt = opt[len(CgroupNamePrefix):]
-			}
+			opt = strings.TrimPrefix(opt, CgroupNamePrefix)
 			m.Subsystems = append(m.Subsystems, opt)
 			numFound++
 		}

Original file line number	Diff line number	Diff line change
`@@ -151,9 +151,7 @@ func getCgroupMountsHelper(ss map[string]bool, mi io.Reader, all bool) ([]Mount,`
`151`	`151`	`continue`
`152`	`152`	`}`
`153`	`153`	`ss[opt] = true`
`154`		`- if strings.HasPrefix(opt, CgroupNamePrefix) {`
`155`		`- opt = opt[len(CgroupNamePrefix):]`
`156`		`- }`
	`154`	`+ opt = strings.TrimPrefix(opt, CgroupNamePrefix)`
`157`	`155`	`m.Subsystems = append(m.Subsystems, opt)`
`158`	`156`	`numFound++`
`159`	`157`	`}`