[PATCH] xip: fs/mm: execute in place

- generic_file* file operations do no longer have a xip/non-xip split
- filemap_xip.c implements a new set of fops that require get_xip_page
  aop to work proper. all new fops are exported GPL-only (don't like to
  see whatever code use those except GPL modules)
- __xip_unmap now uses page_check_address, which is no longer static
  in rmap.c, and defined in linux/rmap.h
- mm/filemap.h is now much more clean, plainly having just Linus'
  inline funcs moved here from filemap.c
- fix includes in filemap_xip to make it build cleanly on i386

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/open.c b/fs/open.c
index 8ec63f735918..3f4a4286fdc4 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -808,7 +808,9 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
 
         /* NB: we're sure to have correct a_ops only after f_op->open */
         if (f->f_flags & O_DIRECT) {
-                if (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO) {
+                if (!f->f_mapping->a_ops ||
+                    ((!f->f_mapping->a_ops->direct_IO) &&
+                    (!f->f_mapping->a_ops->get_xip_page))) {
                         fput(f);
                         f = ERR_PTR(-EINVAL);
                 }