[S390] uaccess_pt: add missing down_read() and convert to is_init().

Doesn't seem to be a good idea to duplicate code :)

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c
index 8741bdc..633249c 100644 (file)
--- a/arch/s390/lib/uaccess_pt.c
+++ b/arch/s390/lib/uaccess_pt.c
@@ -8,8 +8,8 @@
  */
 
 #include <linux/errno.h>
-#include <asm/uaccess.h>
 #include <linux/mm.h>
+#include <asm/uaccess.h>
 #include <asm/futex.h>
 
 static inline int __handle_fault(struct mm_struct *mm, unsigned long address,
@@ -60,8 +60,9 @@ out:
 
 out_of_memory:
        up_read(&mm->mmap_sem);
-       if (current->pid == 1) {
+       if (is_init(current)) {
                yield();
+               down_read(&mm->mmap_sem);
                goto survive;
        }
        printk("VM: killing process %s\n", current->comm);