1 files changed, 39 insertions, 4 deletions

diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 6c285efa2004..7fe85415ae7c 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -39,12 +39,47 @@ static DECLARE_MUTEX(read_mutex);
 #define CRAMINO(x)      ((x)->offset?(x)->offset<<2:1)
 #define OFFSET(x)       ((x)->i_ino)
 
-static struct inode *get_cramfs_inode(struct super_block *sb, struct cramfs_inode * cramfs_inode)
+
+static int cramfs_iget5_test(struct inode *inode, void *opaque)
+{
+        struct cramfs_inode *cramfs_inode = opaque;
+
+        if (inode->i_ino != CRAMINO(cramfs_inode))
+                return 0; /* does not match */
+
+        if (inode->i_ino != 1)
+                return 1;
+
+        /* all empty directories, char, block, pipe, and sock, share inode #1 */
+
+        if ((inode->i_mode != cramfs_inode->mode) ||
+            (inode->i_gid != cramfs_inode->gid) ||
+            (inode->i_uid != cramfs_inode->uid))
+                return 0; /* does not match */
+
+        if ((S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) &&
+            (inode->i_rdev != old_decode_dev(cramfs_inode->size)))
+                return 0; /* does not match */
+
+        return 1; /* matches */
+}
+
+static int cramfs_iget5_set(struct inode *inode, void *opaque)
+{
+        struct cramfs_inode *cramfs_inode = opaque;
+        inode->i_ino = CRAMINO(cramfs_inode);
+        return 0;
+}
+
+static struct inode *get_cramfs_inode(struct super_block *sb,
+                                struct cramfs_inode * cramfs_inode)
 {
-        struct inode * inode = new_inode(sb);
+        struct inode *inode = iget5_locked(sb, CRAMINO(cramfs_inode),
+                                            cramfs_iget5_test, cramfs_iget5_set,
+                                            cramfs_inode);
         static struct timespec zerotime;
 
-        if (inode) {
+        if (inode && (inode->i_state & I_NEW)) {
                 inode->i_mode = cramfs_inode->mode;
                 inode->i_uid = cramfs_inode->uid;
                 inode->i_size = cramfs_inode->size;
@@ -58,7 +93,6 @@ static struct inode *get_cramfs_inode(struct super_block *sb, struct cramfs_inod
                    but it's the best we can do without reading the directory
                    contents.  1 yields the right result in GNU find, even
                    without -noleaf option. */
-                insert_inode_hash(inode);
                 if (S_ISREG(inode->i_mode)) {
                         inode->i_fop = &generic_ro_fops;
                         inode->i_data.a_ops = &cramfs_aops;
@@ -74,6 +108,7 @@ static struct inode *get_cramfs_inode(struct super_block *sb, struct cramfs_inod
                         init_special_inode(inode, inode->i_mode,
                                 old_decode_dev(cramfs_inode->size));
                 }
+                unlock_new_inode(inode);
         }
         return inode;
 }