all: simplify the spelling of Linux

The prefix didn't help clarify anything.

Change-Id: I897fd4022ce9df42a548b15714e4b592618ca547
Reviewed-on: https://go-review.googlesource.com/c/go/+/309573
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

misc/cgo/test/setgid_linux.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Test that setgid does not hang on GNU/Linux.
+// Test that setgid does not hang on Linux.
 // See https://golang.org/issue/3871 for details.
 
 package cgotest

misc/cgo/testcarchive/carchive_test.go

@@ -775,7 +775,7 @@ func TestSIGPROF(t *testing.T) {
 // tool with -buildmode=c-archive, it passes -shared to the compiler,
 // so we override that. The go tool doesn't work this way, but Bazel
 // will likely do it in the future. And it ought to work. This test
-// was added because at one time it did not work on PPC GNU/Linux.
+// was added because at one time it did not work on PPC Linux.
 func TestCompileWithoutShared(t *testing.T) {
 	// For simplicity, reuse the signal forwarding test.
 	checkSignalForwardingTest(t)

src/debug/elf/elf.go

@@ -123,8 +123,8 @@ const (
 	ELFOSABI_NONE       OSABI = 0   /* UNIX System V ABI */
 	ELFOSABI_HPUX       OSABI = 1   /* HP-UX operating system */
 	ELFOSABI_NETBSD     OSABI = 2   /* NetBSD */
-	ELFOSABI_LINUX      OSABI = 3   /* GNU/Linux */
+	ELFOSABI_LINUX      OSABI = 3   /* Linux */
-	ELFOSABI_HURD       OSABI = 4   /* GNU/Hurd */
+	ELFOSABI_HURD       OSABI = 4   /* Hurd */
 	ELFOSABI_86OPEN     OSABI = 5   /* 86Open common IA32 ABI */
 	ELFOSABI_SOLARIS    OSABI = 6   /* Solaris */
 	ELFOSABI_AIX        OSABI = 7   /* AIX */

src/os/file_unix.go

@@ -174,7 +174,7 @@ func newFile(fd uintptr, name string, kind newFileKind) *File {
 		// with the netpoll system. That can happen for
 		// a file descriptor that is not supported by
 		// epoll/kqueue; for example, disk files on
-		// GNU/Linux systems. We assume that any real error
+		// Linux systems. We assume that any real error
 		// will show up in later I/O.
 	} else if pollable {
 		// We successfully registered with netpoll, so put

src/os/signal/doc.go

@@ -50,7 +50,7 @@ If the Go program is started with either SIGHUP or SIGINT ignored
 If the Go program is started with a non-empty signal mask, that will
 generally be honored. However, some signals are explicitly unblocked:
 the synchronous signals, SIGILL, SIGTRAP, SIGSTKFLT, SIGCHLD, SIGPROF,
-and, on GNU/Linux, signals 32 (SIGCANCEL) and 33 (SIGSETXID)
+and, on Linux, signals 32 (SIGCANCEL) and 33 (SIGSETXID)
 (SIGCANCEL and SIGSETXID are used internally by glibc). Subprocesses
 started by os.Exec, or by the os/exec package, will inherit the
 modified signal mask.
@@ -176,7 +176,7 @@ will initialize signals at global constructor time.  For
 shared library is loaded.
 
 If the Go runtime sees an existing signal handler for the SIGCANCEL or
-SIGSETXID signals (which are used only on GNU/Linux), it will turn on
+SIGSETXID signals (which are used only on Linux), it will turn on
 the SA_ONSTACK flag and otherwise keep the signal handler.
 
 For the synchronous signals and SIGPIPE, the Go runtime will install a

src/os/wait_waitid.go

@@ -23,7 +23,7 @@ const _P_PID = 1
 // It does not actually call p.Wait.
 func (p *Process) blockUntilWaitable() (bool, error) {
 	// The waitid system call expects a pointer to a siginfo_t,
-	// which is 128 bytes on all GNU/Linux systems.
+	// which is 128 bytes on all Linux systems.
 	// On darwin/amd64, it requires 104 bytes.
 	// We don't care about the values it returns.
 	var siginfo [16]uint64

src/runtime/cgo/gcc_sigaction.c

@@ -23,7 +23,7 @@ typedef struct {
 } go_sigaction_t;
 
 // SA_RESTORER is part of the kernel interface.
-// This is GNU/Linux i386/amd64 specific.
+// This is Linux i386/amd64 specific.
 #ifndef SA_RESTORER
 #define SA_RESTORER 0x4000000
 #endif

src/runtime/os_linux_be64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// The standard GNU/Linux sigset type on big-endian 64-bit machines.
+// The standard Linux sigset type on big-endian 64-bit machines.
 
 //go:build linux && (ppc64 || s390x)
 // +build linux