ClabureDB: Classified Bug-Reports Database

         struct inode *inode = page->mapping->host;
         struct nfs_page *req;
         int ret;
 
         spin_lock(&inode->i_lock);
         for(;;) {
                 req = nfs_page_find_request_locked(page);
                 if (req == NULL) {
                         spin_unlock(&inode->i_lock);
                         return 0;
                 }
                 if (nfs_set_page_tag_locked(req))
                         break;
                 /* Note: If we hold the page lock, as is the case in nfs_writepage,
                  *         then the call to nfs_set_page_tag_locked() will always
                  *         succeed provided that someone hasn't already marked the
                  *         request as dirty (in which case we don't care).
                  */
                 spin_unlock(&inode->i_lock);
                 ret = nfs_wait_on_request(req);
                 nfs_release_request(req);
                 if (ret != 0)
                         return ret;
                 spin_lock(&inode->i_lock);
         }
         if (test_bit(PG_CLEAN, &req->wb_flags)) {
                 spin_unlock(&inode->i_lock);
                 BUG();
         }
         if (nfs_set_page_writeback(page) != 0) {
                 spin_unlock(&inode->i_lock);
                 BUG();
         }
         spin_unlock(&inode->i_lock);
         if (!nfs_pageio_add_request(pgio, req)) {
                 nfs_redirty_request(req);
                 return pgio->pg_error;
         }
         return 0;
 }