arch/um/kernel/um_arch.c: some small improvements

[linux-2.6-omap-h63xx.git] / arch / um / kernel / skas / process.c

diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index fce389c2342f3d942cdae4d047edbb1f3a2bab50..2e9852c0d487449911fc289e3520a90e6306f9b9 100644 (file)
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -6,19 +6,25 @@
 #include "linux/init.h"
 #include "linux/sched.h"
 #include "as-layout.h"
+#include "kern.h"
 #include "os.h"
 #include "skas.h"
 
 int new_mm(unsigned long stack)
 {
-       int fd;
+       int fd, err;
 
        fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
        if (fd < 0)
                return fd;
 
-       if (skas_needs_stub)
-               map_stub_pages(fd, STUB_CODE, STUB_DATA, stack);
+       if (skas_needs_stub) {
+               err = map_stub_pages(fd, STUB_CODE, STUB_DATA, stack);
+               if (err) {
+                       os_close_file(fd);
+                       return err;
+               }
+       }
 
        return fd;
 }
@@ -49,8 +55,14 @@ int __init start_uml(void)
 {
        stack_protections((unsigned long) &cpu0_irqstack);
        set_sigstack(cpu0_irqstack, THREAD_SIZE);
-       if (proc_mm)
+       if (proc_mm) {
                userspace_pid[0] = start_userspace(0);
+               if (userspace_pid[0] < 0) {
+                       printf("start_uml - start_userspace returned %d\n",
+                              userspace_pid[0]);
+                       exit(1);
+               }
+       }
 
        init_new_thread_signals();