From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Fri, 21 Dec 2007 05:27:47 +0000 (-0500)
Subject: Unionfs: use locking around i_size_write in 32-bit systems
X-Git-Tag: unionfs-2.2~28
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=af4757bffb2a47ea0ae8981d489632ee100a4d80;p=unionfs-2.6.31.y.git

Unionfs: use locking around i_size_write in 32-bit systems

CC: Hugh Dickins <hugh@veritas.com>

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---

diff --git a/fs/unionfs/super.c b/fs/unionfs/super.c
index 0ff9a9e7eea..ed3eb0460fe 100644
--- a/fs/unionfs/super.c
+++ b/fs/unionfs/super.c
@@ -69,7 +69,13 @@ static void unionfs_read_inode(struct inode *inode)
  */
 static void unionfs_delete_inode(struct inode *inode)
 {
+#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
+	spin_lock(&inode->i_lock);
+#endif
 	i_size_write(inode, 0);	/* every f/s seems to do that */
+#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
+	spin_unlock(&inode->i_lock);
+#endif
 
 	if (inode->i_data.nrpages)
 		truncate_inode_pages(&inode->i_data, 0);