Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull VFS updates from Al Viro,

Misc cleanups all over the place, mainly wrt /proc interfaces (switch
create_proc_entry to proc_create(), get rid of the deprecated
create_proc_read_entry() in favor of using proc_create_data() and
seq_file etc).

7kloc removed.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits)
  don't bother with deferred freeing of fdtables
  proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h
  proc: Make the PROC_I() and PDE() macros internal to procfs
  proc: Supply a function to remove a proc entry by PDE
  take cgroup_open() and cpuset_open() to fs/proc/base.c
  ppc: Clean up scanlog
  ppc: Clean up rtas_flash driver somewhat
  hostap: proc: Use remove_proc_subtree()
  drm: proc: Use remove_proc_subtree()
  drm: proc: Use minor->index to label things, not PDE->name
  drm: Constify drm_proc_list[]
  zoran: Don't print proc_dir_entry data in debug
  reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show()
  proc: Supply an accessor for getting the data from a PDE's parent
  airo: Use remove_proc_subtree()
  rtl8192u: Don't need to save device proc dir PDE
  rtl8187se: Use a dir under /proc/net/r8180/
  proc: Add proc_mkdir_data()
  proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h}
  proc: Move PDE_NET() to fs/proc/proc_net.c
  ...

1 files changed, 6 insertions, 5 deletions

diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index ad1a427b5267..b8809fef61f5 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -27,6 +27,7 @@ struct pipe_buffer {
 
 /**
  *      struct pipe_inode_info - a linux kernel pipe
+ *      @mutex: mutex protecting the whole thing
  *      @wait: reader/writer wait point in case of empty/full pipe
  *      @nrbufs: the number of non-empty pipe buffers in this pipe
  *      @buffers: total number of buffers (should be a power of 2)
@@ -34,26 +35,27 @@ struct pipe_buffer {
  *      @tmp_page: cached released page
  *      @readers: number of current readers of this pipe
  *      @writers: number of current writers of this pipe
+ *      @files: number of struct file refering this pipe (protected by ->i_lock)
  *      @waiting_writers: number of writers blocked waiting for room
  *      @r_counter: reader counter
  *      @w_counter: writer counter
  *      @fasync_readers: reader side fasync
  *      @fasync_writers: writer side fasync
- *      @inode: inode this pipe is attached to
  *      @bufs: the circular array of pipe buffers
  **/
 struct pipe_inode_info {
+        struct mutex mutex;
         wait_queue_head_t wait;
         unsigned int nrbufs, curbuf, buffers;
         unsigned int readers;
         unsigned int writers;
+        unsigned int files;
         unsigned int waiting_writers;
         unsigned int r_counter;
         unsigned int w_counter;
         struct page *tmp_page;
         struct fasync_struct *fasync_readers;
         struct fasync_struct *fasync_writers;
-        struct inode *inode;
         struct pipe_buffer *bufs;
 };
 
@@ -144,9 +146,8 @@ int pipe_proc_fn(struct ctl_table *, int, void __user *, size_t *, loff_t *);
 /* Drop the inode semaphore and wait for a pipe event, atomically */
 void pipe_wait(struct pipe_inode_info *pipe);
 
-struct pipe_inode_info * alloc_pipe_info(struct inode * inode);
-void free_pipe_info(struct inode * inode);
-void __free_pipe_info(struct pipe_inode_info *);
+struct pipe_inode_info *alloc_pipe_info(void);
+void free_pipe_info(struct pipe_inode_info *);
 
 /* Generic pipe buffer ops functions */
 void *generic_pipe_buf_map(struct pipe_inode_info *, struct pipe_buffer *, int);