syscall: gofmt

Add blank lines after //sys comments where needed, and then run gofmt
on the syscall package with the new formatter.

This is the libgo version of CL 407136.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/412074

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-0058658a9efb6e5c5faa6f0f65949beea5ddbc98
+bbb3a4347714faee620dc205674510a0f20b81ae
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/syscall/dir_plan9.go

@@ -184,6 +184,7 @@ func gbit8(b []byte) (uint8, []byte) {
 }
 
 // gbit16 reads a 16-bit number in little-endian order from b and returns it with the remaining slice of b.
+//
 //go:nosplit
 func gbit16(b []byte) (uint16, []byte) {
 	return uint16(b[0]) | uint16(b[1])<<8, b[2:]

libgo/go/syscall/errstr.go

@@ -4,8 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !hurd
-// +build !linux
+//go:build !hurd && !linux
+// +build !hurd,!linux
 
 package syscall
 

libgo/go/syscall/errstr_glibc.go

@@ -7,6 +7,7 @@
 // We use this rather than errstr.go because on GNU/Linux sterror_r
 // returns a pointer to the error message, and may not use buf at all.
 
+//go:build hurd || linux
 // +build hurd linux
 
 package syscall

libgo/go/syscall/exec_bsd.go

@@ -49,6 +49,7 @@ func runtime_AfterForkInChild()
 // For the same reason compiler does not race instrument it.
 // The calls to RawSyscall are okay because they are assembly
 // functions that do not grow the stack.
+//
 //go:norace
 func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr *ProcAttr, sys *SysProcAttr, pipe int) (pid int, err Errno) {
 	// Declare all variables at top in case any

libgo/go/syscall/exec_freebsd.go

@@ -57,6 +57,7 @@ func runtime_AfterForkInChild()
 // For the same reason compiler does not race instrument it.
 // The calls to RawSyscall are okay because they are assembly
 // functions that do not grow the stack.
+//
 //go:norace
 func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr *ProcAttr, sys *SysProcAttr, pipe int) (pid int, err Errno) {
 	// Declare all variables at top in case any

libgo/go/syscall/exec_hurd.go

@@ -49,6 +49,7 @@ func runtime_AfterForkInChild()
 // For the same reason compiler does not race instrument it.
 // The calls to RawSyscall are okay because they are assembly
 // functions that do not grow the stack.
+//
 //go:norace
 func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr *ProcAttr, sys *SysProcAttr, pipe int) (pid int, err Errno) {
 	// Declare all variables at top in case any

libgo/go/syscall/exec_linux.go

@@ -80,6 +80,7 @@ func runtime_AfterFork()
 func runtime_AfterForkInChild()
 
 // Implemented in clone_linux.c
+//
 //go:noescape
 func rawClone(flags _C_ulong, child_stack *byte, ptid *Pid_t, ctid *Pid_t, regs unsafe.Pointer) _C_long
 
@@ -92,6 +93,7 @@ func rawClone(flags _C_ulong, child_stack *byte, ptid *Pid_t, ctid *Pid_t, regs
 // For the same reason compiler does not race instrument it.
 // The calls to RawSyscall are okay because they are assembly
 // functions that do not grow the stack.
+//
 //go:norace
 func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr *ProcAttr, sys *SysProcAttr, pipe int) (pid int, err Errno) {
 	// Set up and fork. This returns immediately in the parent or

libgo/go/syscall/exec_stubs.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build rtems
 // +build rtems
 
 // Stubs for fork, exec and wait.

libgo/go/syscall/libcall_aix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix
 // +build aix
 
 package syscall
@@ -95,6 +96,7 @@ func PtraceDetach(pid int) (err error) { return ptrace64(_PT_DETACH, int64(pid),
 
 //sys	reboot(how int) (err error)
 //__linux_reboot(how _C_int) _C_int
+
 func Reboot(how int) (err error) {
 	return reboot(how)
 }

libgo/go/syscall/libcall_bsd.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
 // +build darwin dragonfly freebsd netbsd openbsd
 
 // BSD library calls.
@@ -53,6 +54,7 @@ func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
 
 //sysnb	pipe2(p *[2]_C_int, flags int) (err error)
 //pipe2(p *[2]_C_int, flags _C_int) _C_int
+
 func Pipe2(p []int, flags int) (err error) {
 	if len(p) != 2 {
 		return EINVAL

libgo/go/syscall/libcall_bsd_largefile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (solaris && 386) || (solaris && sparc)
 // +build solaris,386 solaris,sparc
 
 package syscall

libgo/go/syscall/libcall_bsd_regfile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || openbsd || (solaris && amd64) || (solaris && sparc64)
 // +build darwin dragonfly freebsd openbsd solaris,amd64 solaris,sparc64
 
 package syscall

libgo/go/syscall/libcall_bsd_sendfile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || openbsd || solaris
 // +build darwin dragonfly freebsd openbsd solaris
 
 // BSD sendfile support.

libgo/go/syscall/libcall_glibc.go

@@ -20,6 +20,7 @@ import (
 
 //sys	futimesat(dirfd int, path *byte, times *[2]Timeval) (err error)
 //futimesat(dirfd _C_int, path *byte, times *[2]Timeval) _C_int
+
 func Futimesat(dirfd int, path string, tv []Timeval) (err error) {
 	if len(tv) != 2 {
 		return EINVAL
@@ -100,6 +101,7 @@ func ReadDirent(fd int, buf []byte) (n int, err error) {
 
 //sysnb	pipe2(p *[2]_C_int, flags int) (err error)
 //pipe2(p *[2]_C_int, flags _C_int) _C_int
+
 func Pipe2(p []int, flags int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
@@ -113,6 +115,7 @@ func Pipe2(p []int, flags int) (err error) {
 
 //sys	sendfile(outfd int, infd int, offset *Offset_t, count int) (written int, err error)
 //sendfile64(outfd _C_int, infd _C_int, offset *Offset_t, count Size_t) Ssize_t
+
 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
 	if race.Enabled {
 		race.ReleaseMerge(unsafe.Pointer(&ioSync))

libgo/go/syscall/libcall_irix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build irix
 // +build irix
 
 package syscall

libgo/go/syscall/libcall_linux.go

@@ -146,6 +146,7 @@ func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0)
 
 //sys	reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error)
 //reboot(magic1 _C_uint, magic2 _C_uint, cmd _C_int, arg *byte) _C_int
+
 func Reboot(cmd int) (err error) {
 	return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "")
 }
@@ -211,6 +212,7 @@ func Gettid() (tid int) {
 
 //sys	splice(rfd int, roff *_loff_t, wfd int, woff *_loff_t, len int, flags int) (n int64, err error)
 //splice(rfd _C_int, roff *_loff_t, wfd _C_int, woff *_loff_t, len Size_t, flags _C_uint) Ssize_t
+
 func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) {
 	var lroff _loff_t
 	var plroff *_loff_t

libgo/go/syscall/libcall_linux_utimesnano.go

@@ -13,6 +13,7 @@ import "unsafe"
 
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
 //utimensat(dirfd _C_int, path *byte, times *[2]Timespec, flags _C_int) _C_int
+
 func UtimesNano(path string, ts []Timespec) (err error) {
 	if len(ts) != 2 {
 		return EINVAL

libgo/go/syscall/libcall_posix.go

@@ -19,6 +19,7 @@ import "unsafe"
 
 //sysnb	pipe(p *[2]_C_int) (err error)
 //pipe(p *[2]_C_int) _C_int
+
 func Pipe(p []int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
@@ -32,6 +33,7 @@ func Pipe(p []int) (err error) {
 
 //sys	utimes(path string, times *[2]Timeval) (err error)
 //utimes(path *byte, times *[2]Timeval) _C_int
+
 func Utimes(path string, tv []Timeval) (err error) {
 	if len(tv) != 2 {
 		return EINVAL
@@ -240,6 +242,7 @@ func FDZero(set *FdSet) {
 
 //sysnb	gettimeofday(tv *Timeval, tz *byte) (err error)
 //gettimeofday(tv *Timeval, tz *byte) _C_int
+
 func Gettimeofday(tv *Timeval) (err error) {
 	return gettimeofday(tv, nil)
 }

libgo/go/syscall/libcall_posix_largefile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || hurd || linux || (solaris && 386) || (solaris && sparc)
 // +build aix hurd linux solaris,386 solaris,sparc
 
 // POSIX library calls on systems which use the largefile interface.

libgo/go/syscall/libcall_posix_nonhurd.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !hurd
 // +build !hurd
 
 package syscall

libgo/go/syscall/libcall_posix_regfile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !aix && !hurd && !linux && (!solaris || !386) && (!solaris || !sparc)
 // +build !aix
 // +build !hurd
 // +build !linux

libgo/go/syscall/libcall_posix_utimesnano.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || darwin || dragonfly || freebsd || hurd || openbsd || netbsd || solaris
 // +build aix darwin dragonfly freebsd hurd openbsd netbsd solaris
 
 // General POSIX version of UtimesNano.

libgo/go/syscall/libcall_solaris_largefile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (solaris && 386) || (solaris && sparc)
 // +build solaris,386 solaris,sparc
 
 package syscall

libgo/go/syscall/libcall_solaris_regfile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (solaris && amd64) || (solaris && sparc64)
 // +build solaris,amd64 solaris,sparc64
 
 package syscall

libgo/go/syscall/libcall_uname.go

@@ -4,6 +4,7 @@
 
 // Build on all systems other than solaris/386.
 // 32-bit Solaris 2/x86 needs _nuname, handled in libcall_solaris_386.go.
+//go:build !386 || !solaris
 // +build !386 !solaris
 
 package syscall

libgo/go/syscall/libcall_wait4.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !aix
 // +build !aix
 
 // For systems with the wait4 library call.

libgo/go/syscall/sleep_rtems.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build rtems
 // +build rtems
 
 package syscall

libgo/go/syscall/sleep_select.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !rtems
 // +build !rtems
 
 package syscall

libgo/go/syscall/socket_bsd.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || openbsd || netbsd
 // +build darwin dragonfly freebsd openbsd netbsd
 
 package syscall

libgo/go/syscall/socket_hurd.go

@@ -6,6 +6,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build hurd
 // +build hurd
 
 package syscall

libgo/go/syscall/socket_irix.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build irix
 // +build irix
 
 package syscall

libgo/go/syscall/socket_linux_ppc64x_type.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (linux && ppc64) || (linux && ppc64le)
 // +build linux,ppc64 linux,ppc64le
 
 package syscall

libgo/go/syscall/socket_linux_type.go

@@ -4,9 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux
-// +build !ppc64
-// +build !ppc64le
+//go:build linux && !ppc64 && !ppc64le
+// +build linux,!ppc64,!ppc64le
 
 package syscall
 

libgo/go/syscall/socket_posix.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !solaris
 // +build !solaris
 
 package syscall

libgo/go/syscall/socket_xnet.go

@@ -5,6 +5,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build solaris
 // +build solaris
 
 package syscall

libgo/go/syscall/syscall.go

@@ -23,7 +23,6 @@
 // That is also where updates required by new systems or versions
 // should be applied. See https://golang.org/s/go1.4-syscall for more
 // information.
-//
 package syscall
 
 import "unsafe"

libgo/go/syscall/syscall_errno.go

@@ -9,6 +9,7 @@ import "internal/oserror"
 // An Errno is an unsigned number describing an error condition.
 // It implements the error interface. The zero Errno is by convention
 // a non-error, so code to convert from Errno to error should use:
+//
 //	err = nil
 //	if errno != 0 {
 //		err = errno

libgo/go/syscall/syscall_funcs.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || hurd || linux || netbsd || openbsd || solaris
 // +build darwin dragonfly freebsd hurd linux netbsd openbsd solaris
 
 package syscall

libgo/go/syscall/syscall_funcs_stubs.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || rtems
 // +build aix rtems
 
 // These are stubs.

libgo/go/syscall/syscall_glibc.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build hurd || linux
 // +build hurd linux
 
 package syscall

libgo/go/syscall/syscall_js.go

@@ -41,6 +41,7 @@ const PathMax = 256
 // An Errno is an unsigned number describing an error condition.
 // It implements the error interface. The zero Errno is by convention
 // a non-error, so code to convert from Errno to error should use:
+//
 //	err = nil
 //	if errno != 0 {
 //		err = errno

libgo/go/syscall/syscall_linux.go

@@ -19,6 +19,7 @@ package syscall
 // AllThreadsSyscall is unaware of any threads that are launched
 // explicitly by cgo linked code, so the function always returns
 // ENOTSUP in binaries that use cgo.
+//
 //go:uintptrescapes
 func AllThreadsSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
 	return minus1, minus1, ENOTSUP
@@ -26,6 +27,7 @@ func AllThreadsSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
 
 // AllThreadsSyscall6 is like AllThreadsSyscall, but extended to six
 // arguments.
+//
 //go:uintptrescapes
 func AllThreadsSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
 	return minus1, minus1, ENOTSUP