[patch 04/67] UML: Fix UML build failure

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Jeff Dike <jdike@xxxxxxxxxxx>

don't know if the following is already queued, it fixes an ARCH=um build
failure, evidence here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=115875912525137&w=2
and following thread.
Cc-ing uml maintainers and I hope I didn't follow too many
Submitting-patches rules...

The patch is taken from:
http://user-mode-linux.sourceforge.net/work/current/2.6/2.6.18/patches/no-syscallx

Since the syscallx macros seem to be under threat, this patch stops
using them, using syscall instead.

Acked-by: Jeff Dike <jdike@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>


---
 arch/um/os-Linux/process.c      |    4 +---
 arch/um/os-Linux/sys-i386/tls.c |    4 +---
 arch/um/os-Linux/tls.c          |    7 ++-----
 3 files changed, 4 insertions(+), 11 deletions(-)

--- linux-2.6.18.orig/arch/um/os-Linux/process.c
+++ linux-2.6.18/arch/um/os-Linux/process.c
@@ -141,11 +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)
--- linux-2.6.18.orig/arch/um/os-Linux/sys-i386/tls.c
+++ linux-2.6.18/arch/um/os-Linux/sys-i386/tls.c
@@ -3,8 +3,6 @@
 #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 +15,7 @@ void check_host_supports_tls(int *suppor
 		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;
--- linux-2.6.18.orig/arch/um/os-Linux/tls.c
+++ linux-2.6.18/arch/um/os-Linux/tls.c
@@ -48,14 +48,11 @@ int os_get_thread_area(user_desc_t *info
 #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 +63,7 @@ int do_get_thread_area_tt(user_desc_t *i
 {
 	int ret;
 
-	ret = get_thread_area(info);
+	ret = syscall(__NR_get_thread_area, info);
 	if (ret < 0) {
 		ret = -errno;
 	}

--
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