FIEMAP_EXTENT_MERGED  255 fs/ioctl.c     	u32 flags = FIEMAP_EXTENT_MERGED;
FIEMAP_EXTENT_MERGED  288 fs/ioctl.c     				flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST;
FIEMAP_EXTENT_MERGED  314 fs/ioctl.c     			flags = FIEMAP_EXTENT_MERGED;