unix: switch (*CPUSet).Zero to clear builtin

cyphar · cyphar · commit 49acd53ce738 · 2025-08-21T17:41:45.000+10:00
clear was added to Go 1.21 and is better than the manual loop approach.

Signed-off-by: Aleksa Sarai &lt;cyphar@cyphar.com&gt;
diff --git a/unix/affinity_linux.go b/unix/affinity_linux.go
@@ -38,9 +38,7 @@ func SchedSetaffinity(pid int, set *CPUSet) error {
 
 // Zero clears the set s, so that it contains no CPUs.
 func (s *CPUSet) Zero() {
-	for i := range s {
-		s[i] = 0
-	}
+	clear(*s)
 }
 
 func cpuBitsIndex(cpu int) int {

Original file line number	Diff line number	Diff line change
`@@ -38,9 +38,7 @@ func SchedSetaffinity(pid int, set *CPUSet) error {`
`38`	`38`
`39`	`39`	`// Zero clears the set s, so that it contains no CPUs.`
`40`	`40`	`func (s *CPUSet) Zero() {`
`41`		`- for i := range s {`
`42`		`- s[i] = 0`
`43`		`- }`
	`41`	`+ clear(*s)`
`44`	`42`	`}`
`45`	`43`
`46`	`44`	`func cpuBitsIndex(cpu int) int {`