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
  ...

2 files changed, 29 insertions, 94 deletions

diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 6165bd4784f6..dcaafcfc23b0 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -234,68 +234,9 @@ int reiserfs_commit_page(struct inode *inode, struct page *page,
         return ret;
 }
 
-/* Write @count bytes at position @ppos in a file indicated by @file
-   from the buffer @buf.
-
-   generic_file_write() is only appropriate for filesystems that are not seeking to optimize performance and want
-   something simple that works.  It is not for serious use by general purpose filesystems, excepting the one that it was
-   written for (ext2/3).  This is for several reasons:
-
-   * It has no understanding of any filesystem specific optimizations.
-
-   * It enters the filesystem repeatedly for each page that is written.
-
-   * It depends on reiserfs_get_block() function which if implemented by reiserfs performs costly search_by_key
-   * operation for each page it is supplied with. By contrast reiserfs_file_write() feeds as much as possible at a time
-   * to reiserfs which allows for fewer tree traversals.
-
-   * Each indirect pointer insertion takes a lot of cpu, because it involves memory moves inside of blocks.
-
-   * Asking the block allocation code for blocks one at a time is slightly less efficient.
-
-   All of these reasons for not using only generic file write were understood back when reiserfs was first miscoded to
-   use it, but we were in a hurry to make code freeze, and so it couldn't be revised then.  This new code should make
-   things right finally.
-
-   Future Features: providing search_by_key with hints.
-
-*/
-static ssize_t reiserfs_file_write(struct file *file,   /* the file we are going to write into */
-                                   const char __user * buf,     /*  pointer to user supplied data
-                                                                   (in userspace) */
-                                   size_t count,        /* amount of bytes to write */
-                                   loff_t * ppos        /* pointer to position in file that we start writing at. Should be updated to
-                                                         * new current position before returning. */
-                                   )
-{
-        struct inode *inode = file_inode(file); // Inode of the file that we are writing to.
-        /* To simplify coding at this time, we store
-           locked pages in array for now */
-        struct reiserfs_transaction_handle th;
-        th.t_trans_id = 0;
-
-        /* If a filesystem is converted from 3.5 to 3.6, we'll have v3.5 items
-        * lying around (most of the disk, in fact). Despite the filesystem
-        * now being a v3.6 format, the old items still can't support large
-        * file sizes. Catch this case here, as the rest of the VFS layer is
-        * oblivious to the different limitations between old and new items.
-        * reiserfs_setattr catches this for truncates. This chunk is lifted
-        * from generic_write_checks. */
-        if (get_inode_item_key_version (inode) == KEY_FORMAT_3_5 &&
-            *ppos + count > MAX_NON_LFS) {
-                if (*ppos >= MAX_NON_LFS) {
-                        return -EFBIG;
-                }
-                if (count > MAX_NON_LFS - (unsigned long)*ppos)
-                        count = MAX_NON_LFS - (unsigned long)*ppos;
-        }
-
-        return do_sync_write(file, buf, count, ppos);
-}
-
 const struct file_operations reiserfs_file_operations = {
         .read = do_sync_read,
-        .write = reiserfs_file_write,
+        .write = do_sync_write,
         .unlocked_ioctl = reiserfs_ioctl,
 #ifdef CONFIG_COMPAT
         .compat_ioctl = reiserfs_compat_ioctl,
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 9cc0740adffa..33532f79b4f7 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -394,20 +394,24 @@ static int set_sb(struct super_block *sb, void *data)
         return -ENOENT;
 }
 
+struct reiserfs_seq_private {
+        struct super_block *sb;
+        int (*show) (struct seq_file *, struct super_block *);
+};
+
 static void *r_start(struct seq_file *m, loff_t * pos)
 {
-        struct proc_dir_entry *de = m->private;
-        struct super_block *s = de->parent->data;
+        struct reiserfs_seq_private *priv = m->private;
         loff_t l = *pos;
 
         if (l)
                 return NULL;
 
-        if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, 0, s)))
+        if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, 0, priv->sb)))
                 return NULL;
 
-        up_write(&s->s_umount);
-        return s;
+        up_write(&priv->sb->s_umount);
+        return priv->sb;
 }
 
 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
@@ -426,9 +430,8 @@ static void r_stop(struct seq_file *m, void *v)
 
 static int r_show(struct seq_file *m, void *v)
 {
-        struct proc_dir_entry *de = m->private;
-        int (*show) (struct seq_file *, struct super_block *) = de->data;
-        return show(m, v);
+        struct reiserfs_seq_private *priv = m->private;
+        return priv->show(m, v);
 }
 
 static const struct seq_operations r_ops = {
@@ -440,11 +443,15 @@ static const struct seq_operations r_ops = {
 
 static int r_open(struct inode *inode, struct file *file)
 {
-        int ret = seq_open(file, &r_ops);
+        struct reiserfs_seq_private *priv;
+        int ret = seq_open_private(file, &r_ops,
+                                   sizeof(struct reiserfs_seq_private));
 
         if (!ret) {
                 struct seq_file *m = file->private_data;
-                m->private = PDE(inode);
+                priv = m->private;
+                priv->sb = proc_get_parent_data(inode);
+                priv->show = PDE_DATA(inode);
         }
         return ret;
 }
@@ -453,7 +460,7 @@ static const struct file_operations r_file_operations = {
         .open = r_open,
         .read = seq_read,
         .llseek = seq_lseek,
-        .release = seq_release,
+        .release = seq_release_private,
         .owner = THIS_MODULE,
 };
 
@@ -479,9 +486,8 @@ int reiserfs_proc_info_init(struct super_block *sb)
                 *s = '!';
 
         spin_lock_init(&__PINFO(sb).lock);
-        REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
+        REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb);
         if (REISERFS_SB(sb)->procdir) {
-                REISERFS_SB(sb)->procdir->data = sb;
                 add_file(sb, "version", show_version);
                 add_file(sb, "super", show_super);
                 add_file(sb, "per-level", show_per_level);
@@ -499,29 +505,17 @@ int reiserfs_proc_info_init(struct super_block *sb)
 int reiserfs_proc_info_done(struct super_block *sb)
 {
         struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
-        char b[BDEVNAME_SIZE];
-        char *s;
+        if (de) {
+                char b[BDEVNAME_SIZE];
+                char *s;
 
-        /* Some block devices use /'s */
-        strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
-        s = strchr(b, '/');
-        if (s)
-                *s = '!';
+                /* Some block devices use /'s */
+                strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
+                s = strchr(b, '/');
+                if (s)
+                        *s = '!';
 
-        if (de) {
-                remove_proc_entry("journal", de);
-                remove_proc_entry("oidmap", de);
-                remove_proc_entry("on-disk-super", de);
-                remove_proc_entry("bitmap", de);
-                remove_proc_entry("per-level", de);
-                remove_proc_entry("super", de);
-                remove_proc_entry("version", de);
-        }
-        spin_lock(&__PINFO(sb).lock);
-        __PINFO(sb).exiting = 1;
-        spin_unlock(&__PINFO(sb).lock);
-        if (proc_info_root) {
-                remove_proc_entry(b, proc_info_root);
+                remove_proc_subtree(b, proc_info_root);
                 REISERFS_SB(sb)->procdir = NULL;
         }
         return 0;