SWAP_CACHE_PFN_BITS
SWAP_CACHE_PFN_BITS) > SWAP_COUNT_MIN_BITS)
BUILD_BUG_ON(SWAP_CACHE_PFN_BITS >
#define SWP_TB_PFN_BITS (SWAP_CACHE_PFN_BITS + SWAP_CACHE_PFN_MARK_BITS)