[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry

[linux-2.6-omap-h63xx.git] / fs / eventpoll.c

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 1c2b16fda13aa8caf87869f29d2db8eb29ac8438..08e7e6a555cacc71d17333bb8f9ae8510a0e00ea 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -268,9 +268,9 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
                   int maxevents, long timeout);
 static int eventpollfs_delete_dentry(struct dentry *dentry);
 static struct inode *ep_eventpoll_inode(void);
-static struct super_block *eventpollfs_get_sb(struct file_system_type *fs_type,
-                                             int flags, const char *dev_name,
-                                             void *data);
+static int eventpollfs_get_sb(struct file_system_type *fs_type,
+                             int flags, const char *dev_name,
+                             void *data, struct vfsmount *mnt);
 
 /*
  * This semaphore is used to serialize ep_free() and eventpoll_release_file().
@@ -281,16 +281,16 @@ static struct mutex epmutex;
 static struct poll_safewake psw;
 
 /* Slab cache used to allocate "struct epitem" */
-static kmem_cache_t *epi_cache;
+static kmem_cache_t *epi_cache __read_mostly;
 
 /* Slab cache used to allocate "struct eppoll_entry" */
-static kmem_cache_t *pwq_cache;
+static kmem_cache_t *pwq_cache __read_mostly;
 
 /* Virtual fs used to allocate inodes for eventpoll files */
-static struct vfsmount *eventpoll_mnt;
+static struct vfsmount *eventpoll_mnt __read_mostly;
 
 /* File callbacks that implement the eventpoll file behaviour */
-static struct file_operations eventpoll_fops = {
+static const struct file_operations eventpoll_fops = {
        .release        = ep_eventpoll_close,
        .poll           = ep_eventpoll_poll
 };
@@ -337,20 +337,20 @@ static inline int ep_cmp_ffd(struct epoll_filefd *p1,
 /* Special initialization for the rb-tree node to detect linkage */
 static inline void ep_rb_initnode(struct rb_node *n)
 {
-       n->rb_parent = n;
+       rb_set_parent(n, n);
 }
 
 /* Removes a node from the rb-tree and marks it for a fast is-linked check */
 static inline void ep_rb_erase(struct rb_node *n, struct rb_root *r)
 {
        rb_erase(n, r);
-       n->rb_parent = n;
+       rb_set_parent(n, n);
 }
 
 /* Fast check to verify that the item is linked to the main rb-tree */
 static inline int ep_rb_linked(struct rb_node *n)
 {
-       return n->rb_parent != n;
+       return rb_parent(n) != n;
 }
 
 /*
@@ -1595,11 +1595,12 @@ eexit_1:
 }
 
 
-static struct super_block *
+static int
 eventpollfs_get_sb(struct file_system_type *fs_type, int flags,
-                  const char *dev_name, void *data)
+                  const char *dev_name, void *data, struct vfsmount *mnt)
 {
-       return get_sb_pseudo(fs_type, "eventpoll:", NULL, EVENTPOLLFS_MAGIC);
+       return get_sb_pseudo(fs_type, "eventpoll:", NULL, EVENTPOLLFS_MAGIC,
+                            mnt);
 }