Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  truncate: use new helpers
  truncate: new helpers
  fs: fix overflow in sys_mount() for in-kernel calls
  fs: Make unload_nls() NULL pointer safe
  freeze_bdev: grab active reference to frozen superblocks
  freeze_bdev: kill bd_mount_sem
  exofs: remove BKL from super operations
  fs/romfs: correct error-handling code
  vfs: seq_file: add helpers for data filling
  vfs: remove redundant position check in do_sendfile
  vfs: change sb->s_maxbytes to a loff_t
  vfs: explicitly cast s_maxbytes in fiemap_check_ranges
  libfs: return error code on failed attr set
  seq_file: return a negative error code when seq_path_root() fails.
  vfs: optimize touch_time() too
  vfs: optimization for touch_atime()
  vfs: split generic_forget_inode() so that hugetlbfs does not have to copy it
  fs/inode.c: add dev-id and inode number for debugging in init_special_inode()
  libfs: make simple_read_from_buffer conventional

1 files changed, 39 insertions, 35 deletions

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 6c959275f2d0..eae7d9dbf3ff 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -429,20 +429,21 @@ EXPORT_SYMBOL(mangle_path);
  */
 int seq_path(struct seq_file *m, struct path *path, char *esc)
 {
-        if (m->count < m->size) {
-                char *s = m->buf + m->count;
-                char *p = d_path(path, s, m->size - m->count);
+        char *buf;
+        size_t size = seq_get_buf(m, &buf);
+        int res = -1;
+
+        if (size) {
+                char *p = d_path(path, buf, size);
                 if (!IS_ERR(p)) {
-                        s = mangle_path(s, p, esc);
-                        if (s) {
-                                p = m->buf + m->count;
-                                m->count = s - m->buf;
-                                return s - p;
-                        }
+                        char *end = mangle_path(buf, p, esc);
+                        if (end)
+                                res = end - buf;
                 }
         }
-        m->count = m->size;
-        return -1;
+        seq_commit(m, res);
+
+        return res;
 }
 EXPORT_SYMBOL(seq_path);
 
@@ -454,26 +455,28 @@ EXPORT_SYMBOL(seq_path);
 int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
                   char *esc)
 {
-        int err = -ENAMETOOLONG;
-        if (m->count < m->size) {
-                char *s = m->buf + m->count;
+        char *buf;
+        size_t size = seq_get_buf(m, &buf);
+        int res = -ENAMETOOLONG;
+
+        if (size) {
                 char *p;
 
                 spin_lock(&dcache_lock);
-                p = __d_path(path, root, s, m->size - m->count);
+                p = __d_path(path, root, buf, size);
                 spin_unlock(&dcache_lock);
-                err = PTR_ERR(p);
+                res = PTR_ERR(p);
                 if (!IS_ERR(p)) {
-                        s = mangle_path(s, p, esc);
-                        if (s) {
-                                p = m->buf + m->count;
-                                m->count = s - m->buf;
-                                return 0;
-                        }
+                        char *end = mangle_path(buf, p, esc);
+                        if (end)
+                                res = end - buf;
+                        else
+                                res = -ENAMETOOLONG;
                 }
         }
-        m->count = m->size;
-        return err;
+        seq_commit(m, res);
+
+        return res < 0 ? res : 0;
 }
 
 /*
@@ -481,20 +484,21 @@ int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
  */
 int seq_dentry(struct seq_file *m, struct dentry *dentry, char *esc)
 {
-        if (m->count < m->size) {
-                char *s = m->buf + m->count;
-                char *p = dentry_path(dentry, s, m->size - m->count);
+        char *buf;
+        size_t size = seq_get_buf(m, &buf);
+        int res = -1;
+
+        if (size) {
+                char *p = dentry_path(dentry, buf, size);
                 if (!IS_ERR(p)) {
-                        s = mangle_path(s, p, esc);
-                        if (s) {
-                                p = m->buf + m->count;
-                                m->count = s - m->buf;
-                                return s - p;
-                        }
+                        char *end = mangle_path(buf, p, esc);
+                        if (end)
+                                res = end - buf;
                 }
         }
-        m->count = m->size;
-        return -1;
+        seq_commit(m, res);
+
+        return res;
 }
 
 int seq_bitmap(struct seq_file *m, const unsigned long *bits,