BLOCKS_PER_PAGE   215 mm/shmem.c     		inode->i_blocks -= pages*BLOCKS_PER_PAGE;
BLOCKS_PER_PAGE   407 mm/shmem.c     			inode->i_blocks += BLOCKS_PER_PAGE;
BLOCKS_PER_PAGE  1351 mm/shmem.c     			inode->i_blocks += BLOCKS_PER_PAGE;