static void nfs_end_page_writeback(struct page *page) { struct inode *inode = page->mapping->host; struct nfs_server *nfss = NFS_SERVER(inode); end_page_writeback(page); if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); }
value_type operator--() // prefix { return atomic_long_dec_return(&_rep); }