[JFFS2] Prevent ino cache removal for inodes in use
Don't remove inocache for inodes which are in read_inode() or
clear_inode() until they're done.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index 3c6d93c..b835a86 100644
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodelist.c,v 1.92 2005/01/19 19:22:00 tpoynor Exp $
+ * $Id: nodelist.c,v 1.93 2005/02/27 23:01:32 dwmw2 Exp $
*
*/
@@ -506,7 +506,7 @@
void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old)
{
struct jffs2_inode_cache **prev;
- D2(printk(KERN_DEBUG "jffs2_del_ino_cache: Del %p (ino #%u)\n", old, old->ino));
+ D1(printk(KERN_DEBUG "jffs2_del_ino_cache: Del %p (ino #%u)\n", old, old->ino));
spin_lock(&c->inocache_lock);
prev = &c->inocache_list[old->ino % INOCACHE_HASHSIZE];
@@ -518,6 +518,14 @@
*prev = old->next;
}
+ /* Free it now unless it's in READING or CLEARING state, which
+ are the transitions upon read_inode() and clear_inode(). The
+ rest of the time we know nobody else is looking at it, and
+ if it's held by read_inode() or clear_inode() they'll free it
+ for themselves. */
+ if (old->state != INO_STATE_READING && old->state != INO_STATE_CLEARING)
+ jffs2_free_inode_cache(old);
+
spin_unlock(&c->inocache_lock);
}
@@ -530,7 +538,6 @@
this = c->inocache_list[i];
while (this) {
next = this->next;
- D2(printk(KERN_DEBUG "jffs2_free_ino_caches: Freeing ino #%u at %p\n", this->ino, this));
jffs2_free_inode_cache(this);
this = next;
}