From: "Wu, Bryan" <bryan.wu@analog.com>

As struct mm_struct vm_mm is hidden in struct vm_area_struct in NOMMU
arch, this is a fixing method when compiling failure on blackfin arch.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/signal.c |    4 ++++
 1 file changed, 4 insertions(+)

diff -puN kernel/signal.c~vdso-print-fatal-signals-fix-compiling-error-bug-in kernel/signal.c
--- a/kernel/signal.c~vdso-print-fatal-signals-fix-compiling-error-bug-in
+++ a/kernel/signal.c
@@ -825,7 +825,11 @@ static void pad_len_spaces(int len)
 
 static int print_vma(struct vm_area_struct *vma)
 {
+#ifdef CONFIG_MMU
 	struct mm_struct *mm = vma->vm_mm;
+#else
+	struct mm_struct *mm = 0;
+#endif
 	struct file *file = vma->vm_file;
 	int flags = vma->vm_flags;
 	unsigned long ino = 0;
_