linux: Consolidate Linux splice syscall

This patch consolidates the splice Linux syscall generation on
sysdeps/unix/sysv/linux/splice.c.  It basically removes it from
architectures auto-generation list.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu,
sparc64-linux-gnu, and sparcv9-linux-gnu.

	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Add splice.
	(CFLAGS-splice.c): New flag.
	* sysdeps/unix/sysv/linux/splice.c: New file.
	* sysdeps/unix/sysv/linux/syscalls.list (splice): Remove from
	auto-generation syscall list.
	* misc/Makefile (CFLAGS-splice.c): New rule.

ChangeLog

@@ -1,5 +1,12 @@
 2017-05-18  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Add splice.
+	(CFLAGS-splice.c): New flag.
+	* sysdeps/unix/sysv/linux/splice.c: New file.
+	* sysdeps/unix/sysv/linux/syscalls.list (splice): Remove from
+	auto-generation syscall list.
+	* misc/Makefile (CFLAGS-splice.c): New rule.
+
 	* sysdeps/unix/sysv/linux/Makefile (CFLAGS-vmsplice.c): New flag.
 	* sysdeps/unix/sysv/linux/syscalls.list (vmsplice): Remove from
 	auto-generation syscall list.

misc/Makefile

@@ -112,6 +112,7 @@ CFLAGS-msync.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-fdatasync.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-fsync.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-vmsplice.c = -fexceptions -fasynchronous-unwind-tables
+CFLAGS-splice.c = -fexceptions -fasynchronous-unwind-tables
 
 # Called during static library initialization, so turn stack-protection
 # off for non-shared builds.

sysdeps/unix/sysv/linux/Makefile

@@ -17,7 +17,7 @@ include $(firstword $(wildcard $(sysdirs:=/sysctl.mk)))
 sysdep_routines += clone umount umount2 readahead \
 		   setfsuid setfsgid epoll_pwait signalfd \
 		   eventfd eventfd_read eventfd_write prlimit \
-		   personality epoll_wait tee vmsplice
+		   personality epoll_wait tee vmsplice splice
 
 CFLAGS-gethostid.c = -fexceptions
 CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables

sysdeps/unix/sysv/linux/splice.c

@@ -0,0 +1,27 @@
+/* Splice data to/from a pipe Linux implementation.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fcntl.h>
+#include <sysdep-cancel.h>
+
+ssize_t
+splice (int fd_in, loff_t *off_in, int fd_out, loff_t *off_out, size_t len,
+	unsigned int flags)
+{
+  return SYSCALL_CANCEL (splice, fd_in, off_in, fd_out, off_out, len, flags);
+}

sysdeps/unix/sysv/linux/syscalls.list

@@ -64,7 +64,6 @@ setfsgid	EXTRA	setfsgid	i:i	setfsgid
 setfsuid	EXTRA	setfsuid	i:i	setfsuid
 setpgid		-	setpgid		i:ii	__setpgid	setpgid
 sigaltstack	-	sigaltstack	i:PP	__sigaltstack	sigaltstack
-splice		EXTRA	splice		Ci:iPiPii	splice
 stime		-	stime		i:p	stime
 sysinfo		EXTRA	sysinfo		i:p	__sysinfo	sysinfo
 swapon		-	swapon		i:si	__swapon	swapon