* [dhowells-fs:netfs-next-4 7/9] fs/netfs/buffered_read.c:626:31: error: call to '__compiletime_assert_575' declared with 'error' attribute: max(to, ret) signedness error
@ 2026-10-06 13:39 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-10-06 13:39 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp
::::::
:::::: Manual check reason: "__compiletime_assert_NNN"
::::::
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: David Howells <dhowells@redhat.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-next-4
head: 3cb439a956a371e7d3217f13e684b271f1cac997
commit: 4da074c3ab2ca3f97d9a1ac526d803a3bf2ef432 [7/9] netfs: Use bvecq_pos to hold the buffer positions
:::::: branch date: 16 hours ago
:::::: commit date: 16 hours ago
config: powerpc64-randconfig-r2105-20261006 (https://download.01.org/0day-ci/archive/20261006/202610061525.TWEdA6iU-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project dbeca9a3a3ba0b46471efb339b0ea8f2194f6f68)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261006/202610061525.TWEdA6iU-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202610061525.TWEdA6iU-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/netfs/buffered_read.c:626:31: error: call to '__compiletime_assert_575' declared with 'error' attribute: max(to, ret) signedness error
626 | folio_zero_segment(folio, max(to, ret), flen);
| ^
include/linux/minmax.h:112:19: note: expanded from macro 'max'
112 | #define max(x, y) __careful_cmp(max, x, y)
| ^
include/linux/minmax.h:98:2: note: expanded from macro '__careful_cmp'
98 | __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ^
include/linux/minmax.h:93:2: note: expanded from macro '__careful_cmp_once'
93 | BUILD_BUG_ON_MSG(!__types_ok(ux, uy), \
| ^
note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:690:2: note: expanded from macro '_compiletime_assert'
690 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:683:4: note: expanded from macro '__compiletime_assert'
683 | prefix ## suffix(); \
| ^
<scratch space>:63:1: note: expanded from here
63 | __compiletime_assert_575
| ^
fs/netfs/buffered_read.c:626:31: note: called by function 'netfs_read_gaps'
include/linux/minmax.h:112:19: note: expanded from macro 'max'
112 | #define max(x, y) __careful_cmp(max, x, y)
| ^
include/linux/minmax.h:98:2: note: expanded from macro '__careful_cmp'
98 | __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ^
include/linux/minmax.h:93:2: note: expanded from macro '__careful_cmp_once'
93 | BUILD_BUG_ON_MSG(!__types_ok(ux, uy), \
| ^
note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:690:2: note: expanded from macro '_compiletime_assert'
690 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:683:4: note: expanded from macro '__compiletime_assert'
683 | prefix ## suffix(); \
| ^
<scratch space>:63:1: note: expanded from here
63 | __compiletime_assert_575
| ^
fs/netfs/buffered_read.c:626:31: note: inlined by function 'netfs_read_folio'
include/linux/minmax.h:112:19: note: expanded from macro 'max'
112 | #define max(x, y) __careful_cmp(max, x, y)
| ^
include/linux/minmax.h:98:2: note: expanded from macro '__careful_cmp'
98 | __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ^
include/linux/minmax.h:93:2: note: expanded from macro '__careful_cmp_once'
93 | BUILD_BUG_ON_MSG(!__types_ok(ux, uy), \
| ^
note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:690:2: note: expanded from macro '_compiletime_assert'
690 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:683:4: note: expanded from macro '__compiletime_assert'
683 | prefix ## suffix(); \
| ^
<scratch space>:63:1: note: expanded from here
63 | __compiletime_assert_575
| ^
1 error generated.
vim +626 fs/netfs/buffered_read.c
ee4cdf7ba857a8 David Howells 2024-07-02 537
ee4cdf7ba857a8 David Howells 2024-07-02 538 /*
ee4cdf7ba857a8 David Howells 2024-07-02 539 * Read into gaps in a folio partially filled by a streaming write.
ee4cdf7ba857a8 David Howells 2024-07-02 540 */
ee4cdf7ba857a8 David Howells 2024-07-02 541 static int netfs_read_gaps(struct file *file, struct folio *folio)
16211268fcb366 David Howells 2022-03-01 542 {
16211268fcb366 David Howells 2022-03-01 543 struct netfs_io_request *rreq;
ee4cdf7ba857a8 David Howells 2024-07-02 544 struct address_space *mapping = folio->mapping;
a41168aef63435 David Howells 2026-05-12 545 struct netfs_group *group = netfs_folio_group(folio);
ee4cdf7ba857a8 David Howells 2024-07-02 546 struct netfs_folio *finfo = netfs_folio_info(folio);
874c8ca1e60b2c David Howells 2022-06-09 547 struct netfs_inode *ctx = netfs_inode(mapping->host);
4da074c3ab2ca3 David Howells 2026-04-09 548 struct bvecq *bq = NULL;
ee4cdf7ba857a8 David Howells 2024-07-02 549 unsigned int from = finfo->dirty_offset;
ee4cdf7ba857a8 David Howells 2024-07-02 550 unsigned int to = from + finfo->dirty_len;
fc3ae66514ca5e David Howells 2026-09-14 551 unsigned int off = 0;
ee4cdf7ba857a8 David Howells 2024-07-02 552 size_t flen = folio_size(folio);
ee4cdf7ba857a8 David Howells 2024-07-02 553 size_t nr_bvec = flen / PAGE_SIZE + 2;
ee4cdf7ba857a8 David Howells 2024-07-02 554 size_t part;
4da074c3ab2ca3 David Howells 2026-04-09 555 int ret, i = 0;
16211268fcb366 David Howells 2022-03-01 556
a9d47a50cf257f David Howells 2024-07-18 557 _enter("%lx", folio->index);
16211268fcb366 David Howells 2022-03-01 558
ee4cdf7ba857a8 David Howells 2024-07-02 559 rreq = netfs_alloc_request(mapping, file, folio_pos(folio), flen, NETFS_READ_GAPS);
16211268fcb366 David Howells 2022-03-01 560 if (IS_ERR(rreq)) {
16211268fcb366 David Howells 2022-03-01 561 ret = PTR_ERR(rreq);
16211268fcb366 David Howells 2022-03-01 562 goto alloc_error;
16211268fcb366 David Howells 2022-03-01 563 }
16211268fcb366 David Howells 2022-03-01 564
4498a8eccc97de David Howells 2023-11-20 565 ret = netfs_begin_cache_read(rreq, ctx);
16211268fcb366 David Howells 2022-03-01 566 if (ret == -ENOMEM || ret == -EINTR || ret == -ERESTARTSYS)
16211268fcb366 David Howells 2022-03-01 567 goto discard;
16211268fcb366 David Howells 2022-03-01 568
4824e5917f907c David Howells 2024-03-26 569 netfs_stat(&netfs_n_rh_read_folio);
ee4cdf7ba857a8 David Howells 2024-07-02 570 trace_netfs_read(rreq, rreq->start, rreq->len, netfs_read_trace_read_gaps);
92b6cc5d1e7cbe David Howells 2023-09-26 571
ee4cdf7ba857a8 David Howells 2024-07-02 572 /* Fiddle the buffer so that a gap at the beginning and/or a gap at the
ee4cdf7ba857a8 David Howells 2024-07-02 573 * end get copied to, but the middle is discarded.
7f84a7b9892d1c David Howells 2023-10-02 574 */
7f84a7b9892d1c David Howells 2023-10-02 575 ret = -ENOMEM;
4da074c3ab2ca3 David Howells 2026-04-09 576 bq = bvecq_alloc_chain(nr_bvec, rreq->gfp, false);
4da074c3ab2ca3 David Howells 2026-04-09 577 if (!bq)
7f84a7b9892d1c David Howells 2023-10-02 578 goto discard;
4da074c3ab2ca3 David Howells 2026-04-09 579 rreq->dispatch_cursor.bvecq = bq;
7f84a7b9892d1c David Howells 2023-10-02 580
7f84a7b9892d1c David Howells 2023-10-02 581 trace_netfs_folio(folio, netfs_folio_trace_read_gaps);
7f84a7b9892d1c David Howells 2023-10-02 582
4da074c3ab2ca3 David Howells 2026-04-09 583 for (struct bvecq *p = bq; p; p = p->next)
4da074c3ab2ca3 David Howells 2026-04-09 584 p->mem_type = BVECQ_MEM_PAGECACHE;
4da074c3ab2ca3 David Howells 2026-04-09 585
7f84a7b9892d1c David Howells 2023-10-02 586 if (from > 0) {
4da074c3ab2ca3 David Howells 2026-04-09 587 folio_get(folio);
4da074c3ab2ca3 David Howells 2026-04-09 588 bvec_set_folio(&bq->bv[i++], folio, from, 0);
7f84a7b9892d1c David Howells 2023-10-02 589 off = from;
7f84a7b9892d1c David Howells 2023-10-02 590 }
7f84a7b9892d1c David Howells 2023-10-02 591 while (off < to) {
fc3ae66514ca5e David Howells 2026-09-14 592 struct folio *sink = folio_alloc(GFP_KERNEL, 0);
fc3ae66514ca5e David Howells 2026-09-14 593
fc3ae66514ca5e David Howells 2026-09-14 594 if (!sink)
fc3ae66514ca5e David Howells 2026-09-14 595 goto discard;
4da074c3ab2ca3 David Howells 2026-04-09 596 if (i >= bq->max_slots) {
4da074c3ab2ca3 David Howells 2026-04-09 597 bvecq_filled_to(bq, i);
4da074c3ab2ca3 David Howells 2026-04-09 598 bq = bq->next;
4da074c3ab2ca3 David Howells 2026-04-09 599 i = 0;
4da074c3ab2ca3 David Howells 2026-04-09 600 }
4da074c3ab2ca3 David Howells 2026-04-09 601 part = min(to - off, PAGE_SIZE);
4da074c3ab2ca3 David Howells 2026-04-09 602 bvec_set_folio(&bq->bv[i++], sink, part, 0);
7f84a7b9892d1c David Howells 2023-10-02 603 off += part;
7f84a7b9892d1c David Howells 2023-10-02 604 }
4da074c3ab2ca3 David Howells 2026-04-09 605 if (to < flen) {
4da074c3ab2ca3 David Howells 2026-04-09 606 if (i >= bq->max_slots) {
4da074c3ab2ca3 David Howells 2026-04-09 607 bvecq_filled_to(bq, i);
4da074c3ab2ca3 David Howells 2026-04-09 608 bq = bq->next;
4da074c3ab2ca3 David Howells 2026-04-09 609 i = 0;
4da074c3ab2ca3 David Howells 2026-04-09 610 }
4da074c3ab2ca3 David Howells 2026-04-09 611 folio_get(folio);
4da074c3ab2ca3 David Howells 2026-04-09 612 bvec_set_folio(&bq->bv[i++], folio, flen - to, to);
4da074c3ab2ca3 David Howells 2026-04-09 613 }
4da074c3ab2ca3 David Howells 2026-04-09 614 bvecq_filled_to(bq, i);
4da074c3ab2ca3 David Howells 2026-04-09 615
ee4cdf7ba857a8 David Howells 2024-07-02 616 rreq->submitted = rreq->start + flen;
ee4cdf7ba857a8 David Howells 2024-07-02 617
fed0b33e6c5849 David Howells 2026-08-27 618 netfs_read_to_pagecache(rreq);
92b6cc5d1e7cbe David Howells 2023-09-26 619
ee4cdf7ba857a8 David Howells 2024-07-02 620 ret = netfs_wait_for_read(rreq);
e2d46f2ec33253 David Howells 2024-12-16 621 if (ret >= 0) {
8db55c5cd831a7 Paulo Alcantara 2026-09-26 622 if (ret < flen) {
4da074c3ab2ca3 David Howells 2026-04-09 623 if (ret < from)
4da074c3ab2ca3 David Howells 2026-04-09 624 folio_zero_segments(folio, ret, from, to, flen);
4da074c3ab2ca3 David Howells 2026-04-09 625 else
4da074c3ab2ca3 David Howells 2026-04-09 @626 folio_zero_segment(folio, max(to, ret), flen);
8db55c5cd831a7 Paulo Alcantara 2026-09-26 627 }
a41168aef63435 David Howells 2026-05-12 628 if (group)
a41168aef63435 David Howells 2026-05-12 629 folio_change_private(folio, group);
a41168aef63435 David Howells 2026-05-12 630 else
a41168aef63435 David Howells 2026-05-12 631 folio_detach_private(folio);
a41168aef63435 David Howells 2026-05-12 632 kfree(finfo);
a41168aef63435 David Howells 2026-05-12 633 trace_netfs_folio(folio, netfs_folio_trace_filled_gaps);
ee4cdf7ba857a8 David Howells 2024-07-02 634 flush_dcache_folio(folio);
ee4cdf7ba857a8 David Howells 2024-07-02 635 folio_mark_uptodate(folio);
ee4cdf7ba857a8 David Howells 2024-07-02 636 }
3e5dd91b87a8b1 David Howells 2026-05-12 637
4da074c3ab2ca3 David Howells 2026-04-09 638 bvecq_pos_unset(&rreq->dispatch_cursor);
ee4cdf7ba857a8 David Howells 2024-07-02 639 folio_unlock(folio);
20d72b00ca814d David Howells 2025-05-19 640 netfs_put_request(rreq, netfs_rreq_trace_put_return);
ee4cdf7ba857a8 David Howells 2024-07-02 641 return ret < 0 ? ret : 0;
ee4cdf7ba857a8 David Howells 2024-07-02 642
ee4cdf7ba857a8 David Howells 2024-07-02 643 discard:
4da074c3ab2ca3 David Howells 2026-04-09 644 bvecq_pos_unset(&rreq->dispatch_cursor);
4d428dca252c85 Max Kellermann 2025-09-25 645 netfs_put_failed_request(rreq);
ee4cdf7ba857a8 David Howells 2024-07-02 646 alloc_error:
ee4cdf7ba857a8 David Howells 2024-07-02 647 folio_unlock(folio);
ee4cdf7ba857a8 David Howells 2024-07-02 648 return ret;
ee4cdf7ba857a8 David Howells 2024-07-02 649 }
ee4cdf7ba857a8 David Howells 2024-07-02 650
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-10-06 13:39 [dhowells-fs:netfs-next-4 7/9] fs/netfs/buffered_read.c:626:31: error: call to '__compiletime_assert_575' declared with 'error' attribute: max(to, ret) signedness error kernel test robot
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