17 files changed, 67 insertions, 413 deletions

diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 614b8ebeb0ed..1a0001b3850c 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -1,4 +1,4 @@
-# 
+#
 # Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
 # Licensed under the GPL
 #
@@ -7,11 +7,11 @@ extra-y := vmlinux.lds
 clean-files :=
 
 obj-y = config.o exec_kern.o exitcode.o \
-        helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
-        physmem.o process_kern.o ptrace.o reboot.o resource.o sigio_user.o \
-        sigio_kern.o signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o \
-        tempfile.o time.o time_kern.o tlb.o trap_kern.o trap_user.o \
-        uaccess_user.o um_arch.o umid.o user_util.o
+        helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o physmem.o \
+        process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \
+        signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \
+        time_kern.o tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o \
+        umid.o user_util.o
 
 obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
 obj-$(CONFIG_GPROF)     += gprof_syms.o
@@ -24,8 +24,8 @@ obj-$(CONFIG_MODE_SKAS) += skas/
 
 user-objs-$(CONFIG_TTY_LOG) += tty_log.o
 
-USER_OBJS := $(user-objs-y) config.o helper.o main.o tempfile.o time.o \
-        tty_log.o umid.o user_util.o
+USER_OBJS := $(user-objs-y) config.o helper.o main.o time.o tty_log.o umid.o \
+        user_util.o
 
 include arch/um/scripts/Makefile.rules
 
diff --git a/arch/um/kernel/helper.c b/arch/um/kernel/helper.c
index f83e1e8e2392..33fb0bd3b11a 100644
--- a/arch/um/kernel/helper.c
+++ b/arch/um/kernel/helper.c
@@ -85,8 +85,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
         data.fd = fds[1];
         pid = clone(helper_child, (void *) sp, CLONE_VM | SIGCHLD, &data);
         if(pid < 0){
-                printk("run_helper : clone failed, errno = %d\n", errno);
                 ret = -errno;
+                printk("run_helper : clone failed, errno = %d\n", errno);
                 goto out_close;
         }
 
@@ -122,7 +122,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
                       unsigned long *stack_out, int stack_order)
 {
         unsigned long stack, sp;
-        int pid, status;
+        int pid, status, err;
 
         stack = alloc_stack(stack_order, um_in_interrupt());
         if(stack == 0) return(-ENOMEM);
@@ -130,16 +130,18 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
         sp = stack + (page_size() << stack_order) - sizeof(void *);
         pid = clone(proc, (void *) sp, flags | SIGCHLD, arg);
         if(pid < 0){
+                err = -errno;
                 printk("run_helper_thread : clone failed, errno = %d\n", 
                        errno);
-                return(-errno);
+                return err;
         }
         if(stack_out == NULL){
                 CATCH_EINTR(pid = waitpid(pid, &status, 0));
                 if(pid < 0){
+                        err = -errno;
                         printk("run_helper_thread - wait failed, errno = %d\n",
                                errno);
-                        pid = -errno;
+                        pid = err;
                 }
                 if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0))
                         printk("run_helper_thread - thread returned status "
@@ -156,8 +158,8 @@ int helper_wait(int pid)
 
         CATCH_EINTR(ret = waitpid(pid, NULL, WNOHANG));
         if(ret < 0){
+                ret = -errno;
                 printk("helper_wait : waitpid failed, errno = %d\n", errno);
-                return(-errno);
         }
         return(ret);
 }
diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
index cd7c85be0a1b..49ed5ddf0704 100644
--- a/arch/um/kernel/init_task.c
+++ b/arch/um/kernel/init_task.c
@@ -13,6 +13,7 @@
 #include "asm/pgtable.h"
 #include "user_util.h"
 #include "mem_user.h"
+#include "os.h"
 
 static struct fs_struct init_fs = INIT_FS;
 struct mm_struct init_mm = INIT_MM(init_mm);
@@ -45,8 +46,8 @@ __attribute__((__section__(".data.init_task"))) =
 
 void unprotect_stack(unsigned long stack)
 {
-        protect_memory(stack, (1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE, 
-                       1, 1, 0, 1);
+        os_protect_memory((void *) stack, (1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE,
+                       1, 1, 0);
 }
 
 /*
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 64fa062cc119..ea008b031a8f 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
  * Licensed under the GPL
  */
@@ -19,6 +19,10 @@
 #include "mem_user.h"
 #include "uml_uaccess.h"
 #include "os.h"
+#include "linux/types.h"
+#include "linux/string.h"
+#include "init.h"
+#include "kern_constants.h"
 
 extern char __binary_start;
 
@@ -368,6 +372,16 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
         return pte;
 }
 
+struct iomem_region *iomem_regions = NULL;
+int iomem_size = 0;
+
+extern int parse_iomem(char *str, int *add) __init;
+
+__uml_setup("iomem=", parse_iomem,
+"iomem=<name>,<file>\n"
+"    Configure <file> as an IO memory region named <name>.\n\n"
+);
+
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * Emacs will notice this stuff at the end of the file and automatically
diff --git a/arch/um/kernel/mem_user.c b/arch/um/kernel/mem_user.c
deleted file mode 100644
index 4a663fd434bb..000000000000
--- a/arch/um/kernel/mem_user.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * arch/um/kernel/mem_user.c
- *
- * BRIEF MODULE DESCRIPTION
- * user side memory routines for supporting IO memory inside user mode linux
- *
- * Copyright (C) 2001 RidgeRun, Inc.
- * Author: RidgeRun, Inc.
- *         Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the  License, or (at your
- *  option) any later version.
- *
- *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
- *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
- *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
- *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
- *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
- *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *  You should have received a copy of the  GNU General Public License along
- *  with this program; if not, write  to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include "kern_util.h"
-#include "user.h"
-#include "user_util.h"
-#include "mem_user.h"
-#include "init.h"
-#include "os.h"
-#include "tempfile.h"
-#include "kern_constants.h"
-
-#define TEMPNAME_TEMPLATE "vm_file-XXXXXX"
-
-static int create_tmp_file(unsigned long len)
-{
-        int fd, err;
-        char zero;
-
-        fd = make_tempfile(TEMPNAME_TEMPLATE, NULL, 1);
-        if(fd < 0) {
-                os_print_error(fd, "make_tempfile");
-                exit(1);
-        }
-
-        err = os_mode_fd(fd, 0777);
-        if(err < 0){
-                os_print_error(err, "os_mode_fd");
-                exit(1);
-        }
-        err = os_seek_file(fd, len);
-        if(err < 0){
-                os_print_error(err, "os_seek_file");
-                exit(1);
-        }
-        zero = 0;
-        err = os_write_file(fd, &zero, 1);
-        if(err != 1){
-                os_print_error(err, "os_write_file");
-                exit(1);
-        }
-
-        return(fd);
-}
-
-void check_tmpexec(void)
-{
-        void *addr;
-        int err, fd = create_tmp_file(UM_KERN_PAGE_SIZE);
-
-        addr = mmap(NULL, UM_KERN_PAGE_SIZE,
-                    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE, fd, 0);
-        printf("Checking PROT_EXEC mmap in /tmp...");
-        fflush(stdout);
-        if(addr == MAP_FAILED){
-                err = errno;
-                perror("failed");
-                if(err == EPERM)
-                        printf("/tmp must be not mounted noexec\n");
-                exit(1);
-        }
-        printf("OK\n");
-        munmap(addr, UM_KERN_PAGE_SIZE);
-
-        os_close_file(fd);
-}
-
-static int have_devanon = 0;
-
-void check_devanon(void)
-{
-        int fd;
-
-        printk("Checking for /dev/anon on the host...");
-        fd = open("/dev/anon", O_RDWR);
-        if(fd < 0){
-                printk("Not available (open failed with errno %d)\n", errno);
-                return;
-        }
-
-        printk("OK\n");
-        have_devanon = 1;
-}
-
-static int create_anon_file(unsigned long len)
-{
-        void *addr;
-        int fd;
-
-        fd = open("/dev/anon", O_RDWR);
-        if(fd < 0) {
-                os_print_error(fd, "opening /dev/anon");
-                exit(1);
-        }
-
-        addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
-        if(addr == MAP_FAILED){
-                perror("mapping physmem file");
-                exit(1);
-        }
-        munmap(addr, len);
-
-        return(fd);
-}
-
-int create_mem_file(unsigned long len)
-{
-        int err, fd;
-
-        if(have_devanon)
-                fd = create_anon_file(len);
-        else fd = create_tmp_file(len);
-
-        err = os_set_exec_close(fd, 1);
-        if(err < 0)
-                os_print_error(err, "exec_close");
-        return(fd);
-}
-
-struct iomem_region *iomem_regions = NULL;
-int iomem_size = 0;
-
-static int __init parse_iomem(char *str, int *add)
-{
-        struct iomem_region *new;
-        struct uml_stat buf;
-        char *file, *driver;
-        int fd, err, size;
-
-        driver = str;
-        file = strchr(str,',');
-        if(file == NULL){
-                printf("parse_iomem : failed to parse iomem\n");
-                goto out;
-        }
-        *file = '\0';
-        file++;
-        fd = os_open_file(file, of_rdwr(OPENFLAGS()), 0);
-        if(fd < 0){
-                os_print_error(fd, "parse_iomem - Couldn't open io file");
-                goto out;
-        }
-
-        err = os_stat_fd(fd, &buf);
-        if(err < 0){
-                os_print_error(err, "parse_iomem - cannot stat_fd file");
-                goto out_close;
-        }
-
-        new = malloc(sizeof(*new));
-        if(new == NULL){
-                perror("Couldn't allocate iomem_region struct");
-                goto out_close;
-        }
-
-        size = (buf.ust_size + UM_KERN_PAGE_SIZE) & ~(UM_KERN_PAGE_SIZE - 1);
-
-        *new = ((struct iomem_region) { .next           = iomem_regions,
-                                        .driver         = driver,
-                                        .fd             = fd,
-                                        .size           = size,
-                                        .phys           = 0,
-                                        .virt           = 0 });
-        iomem_regions = new;
-        iomem_size += new->size + UM_KERN_PAGE_SIZE;
-
-        return(0);
- out_close:
-        os_close_file(fd);
- out:
-        return(1);
-}
-
-__uml_setup("iomem=", parse_iomem,
-"iomem=<name>,<file>\n"
-"    Configure <file> as an IO memory region named <name>.\n\n"
-);
-
-int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,
-                   int must_succeed)
-{
-        int err;
-
-        err = os_protect_memory((void *) addr, len, r, w, x);
-        if(err < 0){
-                if(must_succeed)
-                        panic("protect failed, err = %d", -err);
-                else return(err);
-        }
-        return(0);
-}
-
-#if 0
-/* Debugging facility for dumping stuff out to the host, avoiding the timing
- * problems that come with printf and breakpoints.
- * Enable in case of emergency.
- */
-
-int logging = 1;
-int logging_fd = -1;
-
-int logging_line = 0;
-char logging_buf[512];
-
-void log(char *fmt, ...)
-{
-        va_list ap;
-        struct timeval tv;
-        struct openflags flags;
-
-        if(logging == 0) return;
-        if(logging_fd < 0){
-                flags = of_create(of_trunc(of_rdwr(OPENFLAGS())));
-                logging_fd = os_open_file("log", flags, 0644);
-        }
-        gettimeofday(&tv, NULL);
-        sprintf(logging_buf, "%d\t %u.%u  ", logging_line++, tv.tv_sec,
-                tv.tv_usec);
-        va_start(ap, fmt);
-        vsprintf(&logging_buf[strlen(logging_buf)], fmt, ap);
-        va_end(ap);
-        write(logging_fd, logging_buf, strlen(logging_buf));
-}
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index c23d8a08d0ff..39cf568ccfaf 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -113,8 +113,23 @@ void set_current(void *t)
 
 void *_switch_to(void *prev, void *next, void *last)
 {
-        return(CHOOSE_MODE(switch_to_tt(prev, next), 
-                           switch_to_skas(prev, next)));
+        struct task_struct *from = prev;
+        struct task_struct *to= next;
+
+        to->thread.prev_sched = from;
+        set_current(to);
+
+        do {
+                current->thread.saved_task = NULL ;
+                CHOOSE_MODE_PROC(switch_to_tt, switch_to_skas, prev, next);
+                if(current->thread.saved_task)
+                        show_regs(&(current->thread.regs));
+                next= current->thread.saved_task;
+                prev= current;
+        } while(current->thread.saved_task);
+
+        return(current->thread.prev_sched);
+
 }
 
 void interrupt_end(void)
diff --git a/arch/um/kernel/skas/include/mode_kern-skas.h b/arch/um/kernel/skas/include/mode_kern-skas.h
index e48490028111..c97a80dfe370 100644
--- a/arch/um/kernel/skas/include/mode_kern-skas.h
+++ b/arch/um/kernel/skas/include/mode_kern-skas.h
@@ -11,7 +11,7 @@
 #include "asm/ptrace.h"
 
 extern void flush_thread_skas(void);
-extern void *switch_to_skas(void *prev, void *next);
+extern void switch_to_skas(void *prev, void *next);
 extern void start_thread_skas(struct pt_regs *regs, unsigned long eip,
                               unsigned long esp);
 extern int copy_thread_skas(int nr, unsigned long clone_flags,
diff --git a/arch/um/kernel/skas/include/uaccess-skas.h b/arch/um/kernel/skas/include/uaccess-skas.h
index 6ee3f3902e68..7da0c2def0ef 100644
--- a/arch/um/kernel/skas/include/uaccess-skas.h
+++ b/arch/um/kernel/skas/include/uaccess-skas.h
@@ -18,12 +18,6 @@
           ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
           ((unsigned long) (addr) + (size) >= (unsigned long)(addr))))
 
-static inline int verify_area_skas(int type, const void __user * addr,
-                                   unsigned long size)
-{
-        return(access_ok_skas(type, addr, size) ? 0 : -EFAULT);
-}
-
 extern int copy_from_user_skas(void *to, const void __user *from, int n);
 extern int copy_to_user_skas(void __user *to, const void *from, int n);
 extern int strncpy_from_user_skas(char *dst, const char __user *src, int count);
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 3d1b227226e6..efe92e8aa2a9 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -24,7 +24,7 @@
 #include "proc_mm.h"
 #include "registers.h"
 
-void *switch_to_skas(void *prev, void *next)
+void switch_to_skas(void *prev, void *next)
 {
         struct task_struct *from, *to;
 
@@ -35,16 +35,11 @@ void *switch_to_skas(void *prev, void *next)
         if(current->pid == 0)
                 switch_timers(0);
 
-        to->thread.prev_sched = from;
-        set_current(to);
-
         switch_threads(&from->thread.mode.skas.switch_buf, 
                        to->thread.mode.skas.switch_buf);
 
         if(current->pid == 0)
                 switch_timers(1);
-
-        return(current->thread.prev_sched);
 }
 
 extern void schedule_tail(struct task_struct *prev);
diff --git a/arch/um/kernel/tempfile.c b/arch/um/kernel/tempfile.c
deleted file mode 100644
index b1674bc1395d..000000000000
--- a/arch/um/kernel/tempfile.c
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/param.h>
-#include "init.h"
-
-/* Modified from create_mem_file and start_debugger */
-static char *tempdir = NULL;
-
-static void __init find_tempdir(void)
-{
-        char *dirs[] = { "TMP", "TEMP", "TMPDIR", NULL };
-        int i;
-        char *dir = NULL;
-
-        if(tempdir != NULL) return;     /* We've already been called */
-        for(i = 0; dirs[i]; i++){
-                dir = getenv(dirs[i]);
-                if((dir != NULL) && (*dir != '\0'))
-                        break;
-        }
-        if((dir == NULL) || (*dir == '\0')) 
-                dir = "/tmp";
-
-        tempdir = malloc(strlen(dir) + 2);
-        if(tempdir == NULL){
-                fprintf(stderr, "Failed to malloc tempdir, "
-                        "errno = %d\n", errno);
-                return;
-        }
-        strcpy(tempdir, dir);
-        strcat(tempdir, "/");
-}
-
-int make_tempfile(const char *template, char **out_tempname, int do_unlink)
-{
-        char tempname[MAXPATHLEN];
-        int fd;
-
-        find_tempdir();
-        if (*template != '/')
-                strcpy(tempname, tempdir);
-        else
-                *tempname = 0;
-        strcat(tempname, template);
-        fd = mkstemp(tempname);
-        if(fd < 0){
-                fprintf(stderr, "open - cannot create %s: %s\n", tempname, 
-                        strerror(errno));
-                return -1;
-        }
-        if(do_unlink && (unlink(tempname) < 0)){
-                perror("unlink");
-                return -1;
-        }
-        if(out_tempname){
-                *out_tempname = strdup(tempname);
-                if(*out_tempname == NULL){
-                        perror("strdup");
-                        return -1;
-                }
-        }
-        return(fd);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 80ed6188e8a2..0a562c3c0fd8 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -307,7 +307,7 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
                 }
                 else if(pte_newprot(*pte)){
                         updated = 1;
-                        protect_memory(addr, PAGE_SIZE, 1, 1, 1, 1);
+                        os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
                 }
                 addr += PAGE_SIZE;
         }
diff --git a/arch/um/kernel/tt/include/mode_kern-tt.h b/arch/um/kernel/tt/include/mode_kern-tt.h
index e0ca0e0b2516..2a35b15c5fef 100644
--- a/arch/um/kernel/tt/include/mode_kern-tt.h
+++ b/arch/um/kernel/tt/include/mode_kern-tt.h
@@ -11,7 +11,7 @@
 #include "asm/ptrace.h"
 #include "asm/uaccess.h"
 
-extern void *switch_to_tt(void *prev, void *next);
+extern void switch_to_tt(void *prev, void *next);
 extern void flush_thread_tt(void);
 extern void start_thread_tt(struct pt_regs *regs, unsigned long eip,
                            unsigned long esp);
diff --git a/arch/um/kernel/tt/include/uaccess-tt.h b/arch/um/kernel/tt/include/uaccess-tt.h
index aa6db384af80..dc2ebfa8c54f 100644
--- a/arch/um/kernel/tt/include/uaccess-tt.h
+++ b/arch/um/kernel/tt/include/uaccess-tt.h
@@ -33,12 +33,6 @@ extern unsigned long uml_physmem;
          (((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \
           (under_task_size(addr, size) || is_stack(addr, size))))
 
-static inline int verify_area_tt(int type, const void __user * addr,
-                                 unsigned long size)
-{
-        return(access_ok_tt(type, addr, size) ? 0 : -EFAULT);
-}
-
 extern unsigned long get_fault_addr(void);
 
 extern int __do_copy_from_user(void *to, const void *from, int n,
diff --git a/arch/um/kernel/tt/mem_user.c b/arch/um/kernel/tt/mem_user.c
index 3085267459b1..03e589895388 100644
--- a/arch/um/kernel/tt/mem_user.c
+++ b/arch/um/kernel/tt/mem_user.c
@@ -12,6 +12,7 @@
 #include "tt.h"
 #include "mem_user.h"
 #include "user_util.h"
+#include "os.h"
 
 void remap_data(void *segment_start, void *segment_end, int w)
 {
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index a189a2b92935..cfaa373a6e77 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -23,10 +23,11 @@
 #include "mem_user.h"
 #include "tlb.h"
 #include "mode.h"
+#include "mode_kern.h"
 #include "init.h"
 #include "tt.h"
 
-void *switch_to_tt(void *prev, void *next, void *last)
+void switch_to_tt(void *prev, void *next)
 {
         struct task_struct *from, *to, *prev_sched;
         unsigned long flags;
@@ -36,8 +37,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
         from = prev;
         to = next;
 
-        to->thread.prev_sched = from;
-
         cpu = from->thread_info->cpu;
         if(cpu == 0)
                 forward_interrupts(to->thread.mode.tt.extern_pid);
@@ -53,7 +52,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
         forward_pending_sigio(to->thread.mode.tt.extern_pid);
 
         c = 0;
-        set_current(to);
 
         err = os_write_file(to->thread.mode.tt.switch_pipe[1], &c, sizeof(c));
         if(err != sizeof(c))
@@ -85,8 +83,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
 
         flush_tlb_all();
         local_irq_restore(flags);
-
-        return(current->thread.prev_sched);
 }
 
 void release_thread_tt(struct task_struct *task)
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 09f6f7ce4695..f0a275947d34 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -361,11 +361,6 @@ int linux_main(int argc, char **argv)
         uml_start = CHOOSE_MODE_PROC(set_task_sizes_tt, set_task_sizes_skas, 0,
                                      &host_task_size, &task_size);
 
-        /* Need to check this early because mmapping happens before the
-         * kernel is running.
-         */
-        check_tmpexec();
-
         brk_start = (unsigned long) sbrk(0);
         CHOOSE_MODE_PROC(before_mem_tt, before_mem_skas, brk_start);
         /* Increase physical memory size for exec-shield users
diff --git a/arch/um/kernel/user_util.c b/arch/um/kernel/user_util.c
index 954ff67cc8b3..41d17c71511c 100644
--- a/arch/um/kernel/user_util.c
+++ b/arch/um/kernel/user_util.c
@@ -109,18 +109,14 @@ int raw(int fd)
         int err;
 
         CATCH_EINTR(err = tcgetattr(fd, &tt));
-        if (err < 0) {
-                        printk("tcgetattr failed, errno = %d\n", errno);
-                return(-errno);
-        }
+        if(err < 0)
+                return -errno;
 
         cfmakeraw(&tt);
 
         CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
-        if (err < 0) {
-                        printk("tcsetattr failed, errno = %d\n", errno);
-                return(-errno);
-        }
+        if(err < 0)
+                return -errno;
 
         /* XXX tcsetattr could have applied only some changes
          * (and cfmakeraw() is a set of changes) */
@@ -132,6 +128,12 @@ void setup_machinename(char *machine_out)
         struct utsname host;
 
         uname(&host);
+#if defined(UML_CONFIG_UML_X86) && !defined(UML_CONFIG_64BIT)
+        if (!strcmp(host.machine, "x86_64")) {
+                strcpy(machine_out, "i686");
+                return;
+        }
+#endif
         strcpy(machine_out, host.machine);
 }