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Subject[PATCH 03/30] Unionfs: use locking around i_size_write in 32-bit systems
Date
CC: Hugh Dickins <hugh@veritas.com>

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---
fs/unionfs/super.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/fs/unionfs/super.c b/fs/unionfs/super.c
index 0ff9a9e..ed3eb04 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);
--
1.5.2.2


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