fs: do not drop inode_lock in dispose_list

Despite the comment above it we can not safely drop the lock here.
invalidate_list is called from many other places that just umount.
Also switch to proper list macros now that we never drop the lock.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/inode.c b/fs/inode.c
index 09e2d7a..1bf2be4 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -482,26 +482,10 @@ static void dispose_list(struct list_head *head)
  */
 static int invalidate_list(struct list_head *head, struct list_head *dispose)
 {
-       struct list_head *next;
+       struct inode *inode, *next;
        int busy = 0;
 
-       next = head->next;
-       for (;;) {
-               struct list_head *tmp = next;
-               struct inode *inode;
-
-               /*
-                * We can reschedule here without worrying about the list's
-                * consistency because the per-sb list of inodes must not
-                * change during umount anymore, and because iprune_sem keeps
-                * shrink_icache_memory() away.
-                */
-               cond_resched_lock(&inode_lock);
-
-               next = next->next;
-               if (tmp == head)
-                       break;
-               inode = list_entry(tmp, struct inode, i_sb_list);
+       list_for_each_entry_safe(inode, next, head, i_sb_list) {
                if (inode->i_state & I_NEW)
                        continue;
                if (atomic_read(&inode->i_count)) {