taglinefilesource code
swap_cache296include/linux/mm.hextern unsigned long * swap_cache;
swap_cache309include/linux/mm.hreturn swap_cache[MAP_NR(addr)]; 
swap_cache319include/linux/mm.hentry = xchg(swap_cache + MAP_NR(addr), 0);
swap_cache334include/linux/mm.hentry= xchg(swap_cache + MAP_NR(addr), 0);
swap_cache85mm/swap.cunsigned long *swap_cache;
swap_cache112mm/swap.centry = xchg(swap_cache + MAP_NR(addr), entry);
swap_cache130mm/swap.cswap_cache = (unsigned long *) mem_start;
swap_cache132mm/swap.cmemset(swap_cache, 0, swap_cache_size * sizeof (unsigned long));
swap_cache133mm/swap.creturn (unsigned long) (swap_cache + swap_cache_size);