NOMMU: Fix SYSV IPC SHM

Fix the SYSV IPC SHM to work with the changes applied by the new fault handler
patches when CONFIG_MMU=n.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index cad2b7ace630..237fe8b8e819 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -295,5 +295,10 @@ unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
  */
 int ramfs_nommu_mmap(struct file *file, struct vm_area_struct *vma)
 {
-        return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS;
+        if (!(vma->vm_flags & VM_SHARED))
+                return -ENOSYS;
+
+        file_accessed(file);
+        vma->vm_ops = &generic_file_vm_ops;
+        return 0;
 }