NTFS: - Fix bug in fs/ntfs/attrib.c::ntfs_find_vcn_nolock() where after

        dropping the read lock and taking the write lock we were not checking
        whether someone else did not already do the work we wanted to do.
      - Rename ntfs_find_vcn_nolock() to ntfs_attr_find_vcn_nolock().
      - Tidy up some comments in fs/ntfs/runlist.c.
      - Add LCN_ENOMEM and LCN_EIO definitions to fs/ntfs/runlist.h.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

1 files changed, 8 insertions, 7 deletions

diff --git a/fs/ntfs/runlist.c b/fs/ntfs/runlist.c
index 1b344dd4d407..3f479f176610 100644
--- a/fs/ntfs/runlist.c
+++ b/fs/ntfs/runlist.c
@@ -933,17 +933,18 @@ err_out:
  *
  * It is up to the caller to serialize access to the runlist @rl.
  *
- * Since lcns must be >= 0, we use negative return values with special meaning:
+ * Since lcns must be >= 0, we use negative return codes with special meaning:
  *
- * Return value                 Meaning / Description
+ * Return code          Meaning / Description
  * ==================================================
- *  -1 = LCN_HOLE               Hole / not allocated on disk.
- *  -2 = LCN_RL_NOT_MAPPED      This is part of the runlist which has not been
- *                              inserted into the runlist yet.
- *  -3 = LCN_ENOENT             There is no such vcn in the attribute.
+ *  LCN_HOLE            Hole / not allocated on disk.
+ *  LCN_RL_NOT_MAPPED   This is part of the runlist which has not been
+ *                      inserted into the runlist yet.
+ *  LCN_ENOENT          There is no such vcn in the attribute.
  *
  * Locking: - The caller must have locked the runlist (for reading or writing).
- *          - This function does not touch the lock.
+ *          - This function does not touch the lock, nor does it modify the
+ *            runlist.
  */
 LCN ntfs_rl_vcn_to_lcn(const runlist_element *rl, const VCN vcn)
 {