memcg: remove unneeded forward declaration from sched.h

[safe/jmp/linux-2.6] / fs / ubifs / tnc.c

diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index 99e9a74..f249f7b 100644 (file)
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -443,6 +443,11 @@ static int tnc_read_node_nm(struct ubifs_info *c, struct ubifs_zbranch *zbr,
  * This function performs that same function as ubifs_read_node except that
  * it does not require that there is actually a node present and instead
  * the return code indicates if a node was read.
+ *
+ * Note, this function does not check CRC of data nodes if @c->no_chk_data_crc
+ * is true (it is controlled by corresponding mount option). However, if
+ * @c->always_chk_crc is true, @c->no_chk_data_crc is ignored and CRC is always
+ * checked.
  */
 static int try_read_node(const struct ubifs_info *c, void *buf, int type,
                         int len, int lnum, int offs)
@@ -470,9 +475,8 @@ static int try_read_node(const struct ubifs_info *c, void *buf, int type,
        if (node_len != len)
                return 0;
 
-       if (type == UBIFS_DATA_NODE && !c->always_chk_crc)
-               if (c->no_chk_data_crc)
-                       return 0;
+       if (type == UBIFS_DATA_NODE && !c->always_chk_crc && c->no_chk_data_crc)
+               return 1;
 
        crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
        node_crc = le32_to_cpu(ch->crc);
@@ -1248,7 +1252,7 @@ int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key,
         * splitting in the middle of the colliding sequence. Also, when
         * removing the leftmost key, we would have to correct the key of the
         * parent node, which would introduce additional complications. Namely,
-        * if we changed the the leftmost key of the parent znode, the garbage
+        * if we changed the leftmost key of the parent znode, the garbage
         * collector would be unable to find it (GC is doing this when GC'ing
         * indexing LEBs). Although we already have an additional RB-tree where
         * we save such changed znodes (see 'ins_clr_old_idx_znode()') until
@@ -1501,7 +1505,12 @@ out:
  * @bu: bulk-read parameters and results
  *
  * Lookup consecutive data node keys for the same inode that reside
- * consecutively in the same LEB.
+ * consecutively in the same LEB. This function returns zero in case of success
+ * and a negative error code in case of failure.
+ *
+ * Note, if the bulk-read buffer length (@bu->buf_len) is known, this function
+ * makes sure bulk-read nodes fit the buffer. Otherwise, this function prepares
+ * maximum possible amount of nodes for bulk-read.
  */
 int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu)
 {
@@ -2240,12 +2249,11 @@ int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key,
                        if (found) {
                                /* Ensure the znode is dirtied */
                                if (znode->cnext || !ubifs_zn_dirty(znode)) {
-                                           znode = dirty_cow_bottom_up(c,
-                                                                       znode);
-                                           if (IS_ERR(znode)) {
-                                                   err = PTR_ERR(znode);
-                                                   goto out_unlock;
-                                           }
+                                       znode = dirty_cow_bottom_up(c, znode);
+                                       if (IS_ERR(znode)) {
+                                               err = PTR_ERR(znode);
+                                               goto out_unlock;
+                                       }
                                }
                                zbr = &znode->zbranch[n];
                                lnc_free(zbr);
@@ -2312,11 +2320,11 @@ int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key,
 
                /* Ensure the znode is dirtied */
                if (znode->cnext || !ubifs_zn_dirty(znode)) {
-                           znode = dirty_cow_bottom_up(c, znode);
-                           if (IS_ERR(znode)) {
-                                   err = PTR_ERR(znode);
-                                   goto out_unlock;
-                           }
+                       znode = dirty_cow_bottom_up(c, znode);
+                       if (IS_ERR(znode)) {
+                               err = PTR_ERR(znode);
+                               goto out_unlock;
+                       }
                }
 
                if (found == 1) {
@@ -2622,11 +2630,11 @@ int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key,
 
                /* Ensure the znode is dirtied */
                if (znode->cnext || !ubifs_zn_dirty(znode)) {
-                           znode = dirty_cow_bottom_up(c, znode);
-                           if (IS_ERR(znode)) {
-                                   err = PTR_ERR(znode);
-                                   goto out_unlock;
-                           }
+                       znode = dirty_cow_bottom_up(c, znode);
+                       if (IS_ERR(znode)) {
+                               err = PTR_ERR(znode);
+                               goto out_unlock;
+                       }
                }
 
                /* Remove all keys in range except the first */