orangefs: don't use d_time

Instead use d_fsdata which is the same size.  Hoping to get rid of d_time,
which is used by very few filesystems by this time.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>

fs/orangefs/dcache.c

@@ -73,7 +73,7 @@ static int orangefs_revalidate_lookup(struct dentry *dentry)
 		}
 	}
 
-	dentry->d_time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+	orangefs_set_timeout(dentry);
 	ret = 1;
 out_release_op:
 	op_release(new_op);
@@ -94,8 +94,9 @@ out_drop:
 static int orangefs_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
 	int ret;
+	unsigned long time = (unsigned long) dentry->d_fsdata;
 
-	if (time_before(jiffies, dentry->d_time))
+	if (time_before(jiffies, time))
 		return 1;
 
 	if (flags & LOOKUP_RCU)

fs/orangefs/namei.c

@@ -72,7 +72,7 @@ static int orangefs_create(struct inode *dir,
 
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
-	dentry->d_time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+	orangefs_set_timeout(dentry);
 	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
@@ -183,7 +183,7 @@ static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
 		goto out;
 	}
 
-	dentry->d_time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+	orangefs_set_timeout(dentry);
 
 	inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
 	if (IS_ERR(inode)) {
@@ -322,7 +322,7 @@ static int orangefs_symlink(struct inode *dir,
 
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
-	dentry->d_time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+	orangefs_set_timeout(dentry);
 	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
@@ -386,7 +386,7 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
-	dentry->d_time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+	orangefs_set_timeout(dentry);
 	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,

fs/orangefs/orangefs-kernel.h

@@ -580,4 +580,11 @@ static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
 #endif
 }
 
+static inline void orangefs_set_timeout(struct dentry *dentry)
+{
+	unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+
+	dentry->d_fsdata = (void *) time;
+}
+
 #endif /* __ORANGEFSKERNEL_H */