os.Unsetenv("GIT_ALLOW_PROTOCOL")
	os.Setenv("HOME", "/test-go-home-does-not-exist")
	// On some systems the default C compiler is ccache.
	// Setting HOME to a non-existent directory will break
	// those systems. Disable ccache and use real compiler. Issue 17668.
	os.Setenv("CCACHE_DISABLE", "1")
	if cfg.Getenv("GOCACHE") == "" {
		os.Setenv("GOCACHE", testGOCACHE) // because $HOME is gone
	}

	s := &Task{id: id}
	return context.WithValue(pctx, traceContextKey{}, s), s

	// We allocate a new task even when
	// the tracing is disabled because the context and task
	// can be used across trace enable/disable boundaries,
	// which complicates the problem.
	//
	// For example, consider the following scenario:
	//   - trace is enabled.
	//   - trace.WithRegion is called, so a new context ctx
	//     with a new region is created.

		cc = append(cc, newComponent(suffix+"_data", asmKind(arch.ptrSize), "interface data", off+arch.ptrSize, arch.ptrSize, suffix))

	case asmInterface:
		cc = append(cc, newComponent(suffix+"_itable", asmKind(arch.ptrSize), "interface itable", off, arch.ptrSize, suffix))
		cc = append(cc, newComponent(suffix+"_data", asmKind(arch.ptrSize), "interface data", off+arch.ptrSize, arch.ptrSize, suffix))

	case asmSlice:

// SetKeepAlivesEnabled controls whether HTTP keep-alives are enabled.
// By default, keep-alives are always enabled. Only very
// resource-constrained environments or servers in the process of
// shutting down should disable them.
func (srv *Server) SetKeepAlivesEnabled(v bool) {
	if v {
		srv.disableKeepAlives.Store(false)
		return
	}
	srv.disableKeepAlives.Store(true)

	// Close idle HTTP/1 conns:

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package ppc64

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package s390x

func schedEnableUser(enable bool) {
	lock(&sched.lock)
	if sched.disable.user == !enable {
		unlock(&sched.lock)
		return
	}
	sched.disable.user = !enable
	if enable {
		n := sched.disable.n
		sched.disable.n = 0
		globrunqputbatch(&sched.disable.runnable, n)
		unlock(&sched.lock)
		for ; n != 0 && sched.npidle.Load() != 0; n-- {
			startm(nil, false, false)

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package arm64

// syncTimer returns c as an unsafe.Pointer, for passing to newTimer.
// If the GODEBUG asynctimerchan has disabled the async timer chan
// code, then syncTimer always returns nil, to disable the special
// channel code paths in the runtime.
func syncTimer(c chan Time) unsafe.Pointer {
	// If asynctimerchan=1, we don't even tell the runtime
	// about channel timers, so that we get the pre-Go 1.23 code paths.

	// could leave allocate-black on, allow allocation to continue
	// as usual, use a ragged barrier at the beginning of sweep to
	// ensure all cached spans are swept, and then disable
	// allocate-black. However, with this approach it's difficult
	// to avoid spilling mark bits into the *next* GC cycle.
	sg := mheap_.sweepgen
	flushGen := c.flushGen.Load()
	if flushGen == sg {
		return