[PATCH] Remove the use of _syscallX macros in UML

User mode linux uses _syscallX() to call into the host kernel.  The
recommended way to do this is to use the syscall() function from libc.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Andi Kleen <ak@muc.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ian Molton <spyro@f2s.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Hirokazu Takata <takata.hirokazu@renesas.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Richard Curnow <rc@rc0.org.uk>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Cc: Chris Zankel <chris@zankel.net>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/os-Linux/process.c

@@ -11,6 +11,7 @@
 #include <sys/mman.h>
 #include <sys/wait.h>
 #include <sys/mman.h>
+#include <sys/syscall.h>
 #include "ptrace_user.h"
 #include "os.h"
 #include "user.h"
@@ -140,11 +141,9 @@ void os_usr1_process(int pid)
  * syscalls, and also breaks with clone(), which does not unshare the TLS.
  */
 
-inline _syscall0(pid_t, getpid)
-
 int os_getpid(void)
 {
-	return(getpid());
+	return(syscall(__NR_getpid));
 }
 
 int os_getpgrp(void)

arch/um/os-Linux/sys-i386/tls.c

@@ -1,10 +1,9 @@
 #include <errno.h>
 #include <linux/unistd.h>
+#include <sys/syscall.h>
 #include "sysdep/tls.h"
 #include "user_util.h"
 
-static _syscall1(int, get_thread_area, user_desc_t *, u_info);
-
 /* Checks whether host supports TLS, and sets *tls_min according to the value
  * valid on the host.
  * i386 host have it == 6; x86_64 host have it == 12, for i386 emulation. */
@@ -17,7 +16,7 @@ void check_host_supports_tls(int *supports_tls, int *tls_min) {
 		user_desc_t info;
 		info.entry_number = val[i];
 
-		if (get_thread_area(&info) == 0) {
+		if (syscall(__NR_get_thread_area, &info) == 0) {
 			*tls_min = val[i];
 			*supports_tls = 1;
 			return;

arch/um/os-Linux/tls.c

@@ -1,5 +1,6 @@
 #include <errno.h>
 #include <sys/ptrace.h>
+#include <sys/syscall.h>
 #include <asm/ldt.h>
 #include "sysdep/tls.h"
 #include "uml-config.h"
@@ -48,14 +49,11 @@ int os_get_thread_area(user_desc_t *info, int pid)
 #ifdef UML_CONFIG_MODE_TT
 #include "linux/unistd.h"
 
-static _syscall1(int, get_thread_area, user_desc_t *, u_info);
-static _syscall1(int, set_thread_area, user_desc_t *, u_info);
-
 int do_set_thread_area_tt(user_desc_t *info)
 {
 	int ret;
 
-	ret = set_thread_area(info);
+	ret = syscall(__NR_set_thread_area,info);
 	if (ret < 0) {
 		ret = -errno;
 	}
@@ -66,7 +64,7 @@ int do_get_thread_area_tt(user_desc_t *info)
 {
 	int ret;
 
-	ret = get_thread_area(info);
+	ret = syscall(__NR_get_thread_area,info);
 	if (ret < 0) {
 		ret = -errno;
 	}

arch/um/sys-i386/unmap.c

@@ -5,20 +5,17 @@
 
 #include <linux/mman.h>
 #include <asm/unistd.h>
+#include <sys/syscall.h>
 
-static int errno;
-
-static inline _syscall2(int,munmap,void *,start,size_t,len)
-static inline _syscall6(void *,mmap2,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset)
 int switcheroo(int fd, int prot, void *from, void *to, int size)
 {
-	if(munmap(to, size) < 0){
+	if (syscall(__NR_munmap, to, size) < 0){
 		return(-1);
 	}
-	if(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1 ){
+	if (syscall(__NR_mmap2, to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1 ){
 		return(-1);
 	}
-	if(munmap(from, size) < 0){
+	if (syscall(__NR_munmap, from, size) < 0){
 		return(-1);
 	}
 	return(0);

arch/um/sys-x86_64/unmap.c

@@ -5,20 +5,17 @@
 
 #include <linux/mman.h>
 #include <asm/unistd.h>
+#include <sys/syscall.h>
 
-static int errno;
-
-static inline _syscall2(int,munmap,void *,start,size_t,len)
-static inline _syscall6(void *,mmap,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset)
 int switcheroo(int fd, int prot, void *from, void *to, int size)
 {
-	if(munmap(to, size) < 0){
+	if (syscall(__NR_munmap, to, size) < 0){
 		return(-1);
 	}
-	if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
+	if (syscall(__NR_mmap, to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
 		return(-1);
 	}
-	if(munmap(from, size) < 0){
+	if (syscall(__NR_munmap, from, size) < 0){
 		return(-1);
 	}
 	return(0);