FYI, we noticed a +4007 bytes kernel size regression due to commit: commit: 3389d7a0a4d77044d7a575f009d07cd6dc48452f (iov_iter: Add ITER_MAPPING) https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter Details as below (size data is obtained by `nm --size-sort vmlinux`): 1bcfb218: fscache: Remove the I/O operation manager 3389d7a0: iov_iter: Add ITER_MAPPING +-------------------------------------+----------+----------+-------+ | symbol | 1bcfb218 | 3389d7a0 | delta | +-------------------------------------+----------+----------+-------+ | bzImage | 439552 | 440864 | 1312 | | nm.T.iov_iter_get_pages | 589 | 939 | 350 | | nm.T.iov_iter_get_pages_alloc | 715 | 1062 | 347 | | nm.T.csum_and_copy_to_iter | 1027 | 1304 | 277 | | nm.T.csum_and_copy_from_iter | 844 | 1094 | 250 | | nm.T.csum_and_copy_from_iter_full | 654 | 900 | 246 | | nm.T.iov_iter_for_each_range | 352 | 582 | 230 | | nm.T._copy_to_iter | 778 | 996 | 218 | | nm.T._copy_from_iter | 560 | 772 | 212 | | nm.T._copy_from_iter_nocache | 560 | 772 | 212 | | nm.T.iov_iter_copy_from_user_atomic | 425 | 635 | 210 | | nm.T.iov_iter_npages | 445 | 654 | 209 | | nm.T.iov_iter_advance | 436 | 638 | 202 | | nm.T._copy_from_iter_full | 399 | 595 | 196 | | nm.T._copy_from_iter_full_nocache | 399 | 595 | 196 | | nm.T.iov_iter_gap_alignment | 328 | 516 | 188 | | nm.T.iov_iter_alignment | 329 | 494 | 165 | | nm.T.iov_iter_zero | 661 | 817 | 156 | | nm.T.iov_iter_mapping | 0 | 47 | 47 | | nm.t.xas_retry | 0 | 30 | 30 | | nm.t.memzero_page | 0 | 25 | 25 | | nm.t.csum_block_add | 0 | 23 | 23 | | nm.T.iov_iter_revert | 200 | 210 | 10 | | nm.T.dup_iter | 70 | 78 | 8 | | nm.T.iov_iter_single_seg_count | 41 | 44 | 3 | | nm.t.csum_and_memcpy | 43 | 40 | -3 | +-------------------------------------+----------+----------+-------+ Thanks, Kbuild test robot