kill struct filename.separate

just make const char iname[] the last member and compare name->name with
name->iname instead of checking name->separate

We need to make sure that out-of-line name doesn't end up allocated adjacent
to struct filename refering to it; fortunately, it's easy to achieve - just
allocate that struct filename with one byte in ->iname[], so that ->iname[0]
will be inside the same object and thus have an address different from that
of out-of-line name [spotted by Boqun Feng <boqun.feng@gmail.com>]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b4d71b5e1ff2..d70e333988f1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2144,7 +2144,7 @@ struct filename {
         const __user char       *uptr;  /* original userland pointer */
         struct audit_names      *aname;
         int                     refcnt;
-        bool                    separate; /* should "name" be freed? */
+        const char              iname[];
 };
 
 extern long vfs_truncate(struct path *, loff_t);