[op] Replace syscall package usage with golang.org/x/sys/unix in pkg/.

The syscall package has been deprecated in favor of golang.org/x/sys.

Note that syscall is still used in the following places:
- pkg/sentry/socket/hostinet/stack.go: some netlink related functionalities
  are not yet available in golang.org/x/sys.
- syscall.Stat_t is still used in some places because os.FileInfo.Sys() still
  returns it and not unix.Stat_t.

Updates #214

PiperOrigin-RevId: 360701387

1 files changed, 5 insertions, 5 deletions

diff --git a/pkg/flipcall/futex_linux.go b/pkg/flipcall/futex_linux.go
index 0e559ee16..c212f05f1 100644
--- a/pkg/flipcall/futex_linux.go
+++ b/pkg/flipcall/futex_linux.go
@@ -20,8 +20,8 @@ import (
 	"fmt"
 	"runtime"
 	"sync/atomic"
-	"syscall"
 
+	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/abi/linux"
 )
 
@@ -66,22 +66,22 @@ func (ep *Endpoint) futexWaitUntilActive() error {
 }
 
 func (ep *Endpoint) futexWakeConnState(numThreads int32) error {
-	if _, _, e := syscall.RawSyscall(syscall.SYS_FUTEX, ep.packet, linux.FUTEX_WAKE, uintptr(numThreads)); e != 0 {
+	if _, _, e := unix.RawSyscall(unix.SYS_FUTEX, ep.packet, linux.FUTEX_WAKE, uintptr(numThreads)); e != 0 {
 		return e
 	}
 	return nil
 }
 
 func (ep *Endpoint) futexWaitConnState(curState uint32) error {
-	_, _, e := syscall.Syscall6(syscall.SYS_FUTEX, ep.packet, linux.FUTEX_WAIT, uintptr(curState), 0, 0, 0)
-	if e != 0 && e != syscall.EAGAIN && e != syscall.EINTR {
+	_, _, e := unix.Syscall6(unix.SYS_FUTEX, ep.packet, linux.FUTEX_WAIT, uintptr(curState), 0, 0, 0)
+	if e != 0 && e != unix.EAGAIN && e != unix.EINTR {
 		return e
 	}
 	return nil
 }
 
 func yieldThread() {
-	syscall.Syscall(syscall.SYS_SCHED_YIELD, 0, 0, 0)
+	unix.Syscall(unix.SYS_SCHED_YIELD, 0, 0, 0)
 	// The thread we're trying to yield to may be waiting for a Go runtime P.
 	// runtime.Gosched() will hand off ours if necessary.
 	runtime.Gosched()