shm: fix unused warnings on nommu

The massive nommu update (8feae131) resulted in these warnings:
ipc/shm.c: In function `sys_shmdt':
ipc/shm.c:974: warning: unused variable `size'
ipc/shm.c:972: warning: unused variable `next'

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index faa46da99ebe..425971600485 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -969,10 +969,13 @@ SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg)
 SYSCALL_DEFINE1(shmdt, char __user *, shmaddr)
 {
         struct mm_struct *mm = current->mm;
-        struct vm_area_struct *vma, *next;
+        struct vm_area_struct *vma;
         unsigned long addr = (unsigned long)shmaddr;
-        loff_t size = 0;
         int retval = -EINVAL;
+#ifdef CONFIG_MMU
+        loff_t size = 0;
+        struct vm_area_struct *next;
+#endif
 
         if (addr & ~PAGE_MASK)
                 return retval;