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-rw-r--r--mm/shmem.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 6ece1e2fe76e..0905215fb016 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2854,10 +2854,14 @@ static int shmem_link(struct dentry *old_dentry, struct inode *dir, struct dentr
* No ordinary (disk based) filesystem counts links as inodes;
* but each new link needs a new dentry, pinning lowmem, and
* tmpfs dentries cannot be pruned until they are unlinked.
+ * But if an O_TMPFILE file is linked into the tmpfs, the
+ * first link must skip that, to get the accounting right.
*/
- ret = shmem_reserve_inode(inode->i_sb);
- if (ret)
- goto out;
+ if (inode->i_nlink) {
+ ret = shmem_reserve_inode(inode->i_sb);
+ if (ret)
+ goto out;
+ }
dir->i_size += BOGO_DIRENT_SIZE;
inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(inode);