NR_FIX_BTMAPS
if (dest_len > (NR_FIX_BTMAPS << PAGE_SHIFT) - dest_off)
dest_len = (NR_FIX_BTMAPS << PAGE_SHIFT) - dest_off;
if (src_len > (NR_FIX_BTMAPS << PAGE_SHIFT) - src_off)
src_len = (NR_FIX_BTMAPS << PAGE_SHIFT) - src_off;
#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
if (WARN_ON(nrpages > NR_FIX_BTMAPS))
idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
slot_virt[i] = __fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i);