NTFS: Fix fs/ntfs/lcnalloc.c::ntfs_cluster_alloc() to use LCN_RL_NOT_MAPPED

rather than LCN_ENOENT as runlist terminator.  Also, make it not create a
LCN_RL_NOT_MAPPED element at the beginning.

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

diff --git a/fs/ntfs/lcnalloc.c b/fs/ntfs/lcnalloc.c
index be3617c056f9cd4b3590d037a96a872149dc7cd6..84d66518422b27f3606dc9f2ee928d49c6a8d19d 100644 (file)
--- a/fs/ntfs/lcnalloc.c
+++ b/fs/ntfs/lcnalloc.c
@@ -167,16 +167,9 @@ runlist_element *ntfs_cluster_alloc(ntfs_volume *vol, const VCN start_vcn,
                rl = ntfs_malloc_nofs(PAGE_SIZE);
                if (!rl)
                        return ERR_PTR(-ENOMEM);
-               rlpos = 0;
-               if (start_vcn) {
-                       rl[0].vcn = 0;
-                       rl[0].lcn = LCN_RL_NOT_MAPPED;
-                       rl[0].length = start_vcn;
-                       rlpos++;
-               }
-               rl[rlpos].vcn = start_vcn;
-               rl[rlpos].lcn = LCN_ENOENT;
-               rl[rlpos].length = 0;
+               rl[0].vcn = start_vcn;
+               rl[0].lcn = LCN_RL_NOT_MAPPED;
+               rl[0].length = 0;
                return rl;
        }
        /* Take the lcnbmp lock for writing. */
@@ -405,14 +398,7 @@ runlist_element *ntfs_cluster_alloc(ntfs_volume *vol, const VCN start_vcn,
                                } else {
                                        ntfs_debug("Adding new run, is first "
                                                        "run.");
-                                       rl[rlpos].vcn = 0;
-                                       if (start_vcn) {
-                                               rl[rlpos].lcn =
-                                                       LCN_RL_NOT_MAPPED;
-                                               rl[rlpos].length = start_vcn;
-                                               rlpos++;
-                                               rl[rlpos].vcn = start_vcn;
-                                       }
+                                       rl[rlpos].vcn = start_vcn;
                                }
                                rl[rlpos].lcn = prev_lcn = lcn + bmp_pos;
                                rl[rlpos].length = prev_run_len = 1;
@@ -746,7 +732,7 @@ out:
        /* Add runlist terminator element. */
        if (likely(rl)) {
                rl[rlpos].vcn = rl[rlpos - 1].vcn + rl[rlpos - 1].length;
-               rl[rlpos].lcn = LCN_ENOENT;
+               rl[rlpos].lcn = LCN_RL_NOT_MAPPED;
                rl[rlpos].length = 0;
        }
        if (likely(page && !IS_ERR(page))) {