kernel/fork.c: simplify copy_mm()

All this can happen without a single goto.

Link: https://lkml.kernel.org/r/2072685.XptgVkyDqn@devpool47
Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/fork.c b/kernel/fork.c
index 771e0ea..784f7ca 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1396,7 +1396,6 @@ fail_nomem:
 static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
 {
        struct mm_struct *mm, *oldmm;
-       int retval;
 
        tsk->min_flt = tsk->maj_flt = 0;
        tsk->nvcsw = tsk->nivcsw = 0;
@@ -1423,21 +1422,15 @@ static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
        if (clone_flags & CLONE_VM) {
                mmget(oldmm);
                mm = oldmm;
-               goto good_mm;
+       } else {
+               mm = dup_mm(tsk, current->mm);
+               if (!mm)
+                       return -ENOMEM;
        }
 
-       retval = -ENOMEM;
-       mm = dup_mm(tsk, current->mm);
-       if (!mm)
-               goto fail_nomem;
-
-good_mm:
        tsk->mm = mm;
        tsk->active_mm = mm;
        return 0;
-
-fail_nomem:
-       return retval;
 }
 
 static int copy_fs(unsigned long clone_flags, struct task_struct *tsk)