W1_PAGE_BITS
min_page = (off >> W1_PAGE_BITS);
max_page = (off + count - 1) >> W1_PAGE_BITS;
clear_bit(addr >> W1_PAGE_BITS, f23->validcrc);
min_page = (off >> W1_PAGE_BITS);
max_page = (off + count - 1) >> W1_PAGE_BITS;
f1C->validcrc &= ~(1 << (addr >> W1_PAGE_BITS));