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Date: Thu, 2 Jun 2022 05:40:11 +0800
From: kernel test robot <lkp@...el.com>
To: David Howells <dhowells@...hat.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:dhowells/linux-fs/netfs-linked-list 58/59]
fs/netfs/buffered_flush.c:411:16: warning: comparison of distinct pointer
types ('typeof (hard_align) *' (aka 'unsigned int *') and 'typeof (((1UL) <<
12) << ctx->cache_order) *' (aka 'unsigned long *'))
tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-linked-list
head: 22ecc2fcdab4616e624408911ec1d54644e82030
commit: ff509dc49891f934a7a774e277b87729018db753 [58/59] netfs: Use flush from afs_writeback
config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220602/202206020513.KecvF1iO-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c825abd6b0198fb088d9752f556a70705bc99dfd)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/ammarfaizi2/linux-block/commit/ff509dc49891f934a7a774e277b87729018db753
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-linked-list
git checkout ff509dc49891f934a7a774e277b87729018db753
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/netfs/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
fs/netfs/buffered_flush.c:408:16: warning: comparison of distinct pointer types ('typeof (hard_align) *' (aka 'unsigned int *') and 'typeof (1UL << __builtin_choose_expr(((!!(sizeof ((typeof (ctx->min_bshift) *)1 == (typeof (ctx->crypto_bshift) *)1))) && ((sizeof(int) == sizeof (*(8 ? ((void *)((long)(ctx->min_bshift) * 0L)) : (int *)8))) && (sizeof(int) == sizeof (*(8 ? ((void *)((long)(ctx->crypto_bshift) * 0L)) : (int *)8))))), ((ctx->min_bshift) > (ctx->crypto_bshift) ? (ctx->min_bshift) : (ctx->crypto_bshift)), ({
typeof (ctx->min_bshift) __UNIQUE_ID___x312 = (ctx->min_bshift);
typeof (ctx->crypto_bshift) __UNIQUE_ID___y313 = (ctx->crypto_bshift);
((__UNIQUE_ID___x312) > (__UNIQUE_ID___y313) ? (__UNIQUE_ID___x312) : (__UNIQUE_ID___y313));
}))) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
hard_align = max(hard_align,
^~~~~~~~~~~~~~~
include/linux/minmax.h:52:19: note: expanded from macro 'max'
#define max(x, y) __careful_cmp(x, y, >)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
>> fs/netfs/buffered_flush.c:411:16: warning: comparison of distinct pointer types ('typeof (hard_align) *' (aka 'unsigned int *') and 'typeof (((1UL) << 12) << ctx->cache_order) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
hard_align = max(hard_align, PAGE_SIZE << ctx->cache_order);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:52:19: note: expanded from macro 'max'
#define max(x, y) __careful_cmp(x, y, >)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
>> fs/netfs/buffered_flush.c:413:10: warning: comparison of distinct pointer types ('typeof (hard_align) *' (aka 'unsigned int *') and 'typeof ((1UL << (0 ? 4 : 6)) * ((1UL) << 12)) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
align = min(hard_align, XA_CHUNK_SIZE * PAGE_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:45:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
fs/netfs/buffered_flush.c:533:22: warning: format specifies type 'size_t' (aka 'unsigned int') but the argument has type 'unsigned long' [-Wformat]
_leave(" ok [%zx]", wreq->last);
~~~ ^~~~~~~~~~
%lx
fs/netfs/internal.h:299:65: note: expanded from macro '_leave'
#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
include/linux/printk.h:132:17: note: expanded from macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
~~~ ^~~~~~~~~~~
include/linux/printk.h:446:60: note: expanded from macro 'printk'
#define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap'
_p_func(_fmt, ##__VA_ARGS__); \
~~~~ ^~~~~~~~~~~
fs/netfs/buffered_flush.c:545:26: warning: format specifies type 'size_t' (aka 'unsigned int') but the argument has type 'unsigned long' [-Wformat]
_leave(" cancel [%zx]", wreq->last);
~~~ ^~~~~~~~~~
%lx
fs/netfs/internal.h:299:65: note: expanded from macro '_leave'
#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
include/linux/printk.h:132:17: note: expanded from macro 'no_printk'
printk(fmt, ##__VA_ARGS__); \
~~~ ^~~~~~~~~~~
include/linux/printk.h:446:60: note: expanded from macro 'printk'
#define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap'
_p_func(_fmt, ##__VA_ARGS__); \
~~~~ ^~~~~~~~~~~
fs/netfs/buffered_flush.c:348:33: warning: unused function 'netfs_find_writeback' [-Wunused-function]
static struct netfs_io_request *netfs_find_writeback(struct netfs_i_context *ctx,
^
fs/netfs/buffered_flush.c:364:13: warning: unused function 'netfs_wait_for_writeback' [-Wunused-function]
static void netfs_wait_for_writeback(struct netfs_io_request *wreq,
^
7 warnings generated.
vim +411 fs/netfs/buffered_flush.c
372
373 /*
374 * Extend the region to be written back to include subsequent contiguously
375 * dirty pages if possible, but don't sleep while doing so.
376 *
377 * If this page holds new content, then we can include filler zeros in the
378 * writeback.
379 */
380 static void netfs_extend_writeback(struct netfs_io_request *wreq,
381 struct writeback_control *wbc,
382 struct netfs_i_context *ctx,
383 struct netfs_dirty_region *region)
384 {
385 struct folio_batch fbatch;
386 struct folio *folio;
387 unsigned int i;
388 pgoff_t index = wreq->last + 1, stop_mask, stop_at, max_pages;
389 ssize_t max_size;
390 size_t align, hard_align;
391 bool stop = true, dirty;
392 int ret;
393
394 XA_STATE(xas, &wreq->mapping->i_pages, index);
395
396 _enter("%lx", index);
397
398 /* We have a number of criteria by which we can decide where to stop
399 * extension of this writeback:
400 *
401 * 1) The maximum I/O size (but wbacks can be subdivided)
402 * 2) Boundaries within the filesystem (eg. ceph object size)
403 * 3) Local boundaries (cache granules, VM radix node sizes)
404 * 4) Content crypto/compression boundaries
405 */
406 hard_align = PAGE_SIZE;
407 if (ctx->min_bshift || ctx->crypto_bshift)
408 hard_align = max(hard_align,
409 1UL << max(ctx->min_bshift, ctx->crypto_bshift));
410 if (ctx->cache_order)
> 411 hard_align = max(hard_align, PAGE_SIZE << ctx->cache_order);
412
> 413 align = min(hard_align, XA_CHUNK_SIZE * PAGE_SIZE);
414 if (wreq->alignment > align)
415 align = wreq->alignment;
416
417 stop_mask = (align - 1) / PAGE_SIZE;
418
419 max_size = XA_CHUNK_SIZE * PAGE_SIZE;
420 if (wreq->wsize > max_size)
421 max_size = roundup_pow_of_two(wreq->wsize);
422
423 _debug("LIMITS al=%zx ha=%zx mx=%zx", align, hard_align, max_size);
424
425 max_pages = max_size / PAGE_SIZE;
426 max_pages &= ~stop_mask;
427 _debug("MAX_PAGES %lx %lx", max_pages, stop_mask);
428 if (wreq->last - wreq->first + 1 >= max_pages) {
429 _leave(" [already hit wsize %lx %lx]",
430 wreq->last - wreq->first + 1, max_pages);
431 return;
432 }
433
434 stop_at = wreq->first + max_pages;
435 if (stop_at < wreq->first)
436 stop_at = ULONG_MAX;
437 else
438 stop_at = round_down(stop_at, align / PAGE_SIZE);
439 _debug("STOP_AT %lx (%lx %lx %lx)", stop_at, wreq->first, max_pages, align / PAGE_SIZE);
440
441 if (index >= stop_at || wbc->nr_to_write <= 0 || wreq->len > max_size) {
442 _leave(" [prestop]");
443 return;
444 }
445
446 do {
447 /* Firstly, we gather up a batch of contiguous dirty folios
448 * under the RCU read lock - but we can't clear the dirty flags
449 * there if any of those folios are mapped.
450 */
451 folio_batch_init(&fbatch);
452 _debug("extend %lx %lx", index, xas.xa_index);
453 rcu_read_lock();
454
455 xas_for_each(&xas, folio, ULONG_MAX) {
456 stop = true;
457 if (xas_retry(&xas, folio))
458 continue;
459 if (xa_is_value(folio))
460 break;
461 if (folio_index(folio) != index)
462 break;
463
464 if (!folio_try_get_rcu(folio)) {
465 xas_reset(&xas);
466 continue;
467 }
468
469 /* Has the folio moved or been split? */
470 if (unlikely(folio != xas_reload(&xas))) {
471 folio_put(folio);
472 break;
473 }
474
475 if (!folio_trylock(folio)) {
476 folio_put(folio);
477 break;
478 }
479 if (!folio_test_dirty(folio) ||
480 folio_test_writeback(folio)) {
481 folio_unlock(folio);
482 folio_put(folio);
483 break;
484 }
485
486 wreq->len += folio_size(folio);
487 index += folio_nr_pages(folio);
488 stop = index >= stop_at || wbc->nr_to_write <= 0;
489
490 if (!folio_batch_add(&fbatch, folio))
491 break;
492 if (stop)
493 break;
494 }
495
496 if (!stop)
497 xas_pause(&xas);
498 rcu_read_unlock();
499
500 /* Now, if we obtained any pages, we can shift them to being
501 * writable and mark them for caching.
502 */
503 if (!folio_batch_count(&fbatch))
504 break;
505
506 for (i = 0; i < folio_batch_count(&fbatch); i++) {
507 folio = fbatch.folios[i];
508 //_debug("found [%x] %lx", i, folio->index);
509 trace_netfs_folio_dirty(wreq->mapping, folio,
510 netfs_folio_trace_store_ex);
511
512 dirty = folio_clear_dirty_for_io(folio);
513 if (folio_start_writeback(folio)) {
514 _debug("! no wb");
515 goto nomem_redirty;
516 }
517
518 ret = netfs_xa_store_and_mark(&wreq->buffer, folio->index, folio,
519 true, true, dirty, GFP_NOFS);
520 if (ret < 0) {
521 _debug("! no buffer");
522 goto nomem_cancel_wb;
523 }
524 wbc->nr_to_write -= folio_nr_pages(folio);
525 index = folio_next_index(folio);
526 wreq->last = index - 1;
527 folio_unlock(folio);
528 }
529
530 cond_resched();
531 } while (!stop);
532
533 _leave(" ok [%zx]", wreq->last);
534 return;
535
536 nomem_cancel_wb:
537 folio_end_writeback(folio);
538 nomem_redirty:
539 if (dirty)
540 folio_redirty_for_writepage(wbc, folio);
541 for (; i < folio_batch_count(&fbatch); i++) {
542 folio_unlock(folio);
543 folio_put(folio);
544 }
545 _leave(" cancel [%zx]", wreq->last);
546 }
547
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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