[patch] mpol_free_shared_poliy() is not called for non-inline symlink under tmpfs

[patch] mpol_free_shared_poliy() is not called for non-inline symlink under tmpfs

[Nobuhiro Tachino]

Hi,

If the inode is non-inline symbolic link under tmpfs,
shmem_destroy_inode() always skips to call mpol_free_shared_policy().
However the policy field of non-inline symbolic link inode is intact and
I think it is better to be freed by mpol_free_shared_policy().
I'm not sure this actually causes any serious problem, but
the following patch fixes it anyway.


diff -Npur linux.org/mm/shmem.c linux/mm/shmem.c
--- linux.org/mm/shmem.c	2005-07-23 04:44:43.000000000 -0400
+++ linux/mm/shmem.c	2005-07-23 04:58:52.000000000 -0400
@@ -2032,8 +2032,8 @@ static struct inode *shmem_alloc_inode(s

  static void shmem_destroy_inode(struct inode *inode)
  {
-	if ((inode->i_mode & S_IFMT) == S_IFREG) {
-		/* only struct inode is valid if it's an inline symlink */
+	if ((inode->i_mode & S_IFMT) == S_IFREG ||
+	    inode->i_op == &shmem_symlink_inode_operations) {
  		mpol_free_shared_policy(&SHMEM_I(inode)->policy);
  	}
  	kmem_cache_free(shmem_inode_cachep, SHMEM_I(inode));