JBD2_CONTROL_BLOCKS_SHIFT 1332 include/linux/jbd2.h return nblocks + (nblocks >> JBD2_CONTROL_BLOCKS_SHIFT); JBD2_CONTROL_BLOCKS_SHIFT 1348 include/linux/jbd2.h free -= committing + (committing >> JBD2_CONTROL_BLOCKS_SHIFT);