kernel/fork.c: remove redundant NULL check in dup_mm()

current->mm doesn't need a NULL check in dup_mm().  Becasue dup_mm() is
used only in copy_mm() and current->mm is checked whether it is NULL or
not in copy_mm() before calling dup_mm().

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/kernel/fork.c b/kernel/fork.c
index 26224886fa215054ee026ed30ab46b4d0a3d7008..b824096c4c0b2d847e0d9dec4beddf436886ac95 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -805,9 +805,6 @@ static struct mm_struct *dup_mm(struct task_struct *tsk)
        struct mm_struct *mm, *oldmm = current->mm;
        int err;
 
-       if (!oldmm)
-               return NULL;
-
        mm = allocate_mm();
        if (!mm)
                goto fail_nomem;