(on top of mm-only-i_size_write-debugging.patch)
(merged into -mm on 19 Oct 2006)

[PATCH] Fix spurious warning in i_size_write

i_size_write() can be legitimately called without inode->i_mutex locked.
This is OK in cases when the inode has not been yet linked into
the parent dentry, so no race condition on i_size can occur.

Signed-off-by: Jiri Kosina <EMAIL_REMOVED>
Signed-off-by: Andrew Morton <akpm@osdl.org>

--- 

 fs/inode.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/fs/inode.c b/fs/inode.c
index bb88835..11d8794 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1386,7 +1386,9 @@ void __init inode_init(unsigned long mem
 
 void i_size_write(struct inode *inode, loff_t i_size)
 {
-	WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
+	/* calling us without i_mutex is OK when not connected to dentry yet */
+	if (!list_empty(&inode->i_dentry))
+		WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
 	write_seqcount_begin(&inode->i_size_seqcount);
 	inode->i_size = i_size;