* fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
@ 2023-10-28 19:53 kernel test robot
0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2023-10-28 19:53 UTC (permalink / raw)
To: Jens Axboe; +Cc: oe-kbuild-all, linux-kernel
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2af9b20dbb39f6ebf9b9b6c090271594627d818e
commit: caf1aeaffc3b09649a56769e559333ae2c4f1802 eventpoll: add EPOLL_URING_WAKE poll wakeup flag
date: 11 months ago
config: x86_64-randconfig-123-20231016 (https://download.01.org/0day-ci/archive/20231029/202310290310.o2kYsmHJ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231029/202310290310.o2kYsmHJ-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/oe-kbuild-all/202310290310.o2kYsmHJ-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
>> fs/eventpoll.c:526:9: sparse: sparse: cast to restricted __poll_t
>> fs/eventpoll.c:1213:53: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected unsigned int pollflags @@ got restricted __poll_t @@
fs/eventpoll.c:1213:53: sparse: expected unsigned int pollflags
fs/eventpoll.c:1213:53: sparse: got restricted __poll_t
vim +526 fs/eventpoll.c
493
494 static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi,
495 unsigned pollflags)
496 {
497 struct eventpoll *ep_src;
498 unsigned long flags;
499 u8 nests = 0;
500
501 /*
502 * To set the subclass or nesting level for spin_lock_irqsave_nested()
503 * it might be natural to create a per-cpu nest count. However, since
504 * we can recurse on ep->poll_wait.lock, and a non-raw spinlock can
505 * schedule() in the -rt kernel, the per-cpu variable are no longer
506 * protected. Thus, we are introducing a per eventpoll nest field.
507 * If we are not being call from ep_poll_callback(), epi is NULL and
508 * we are at the first level of nesting, 0. Otherwise, we are being
509 * called from ep_poll_callback() and if a previous wakeup source is
510 * not an epoll file itself, we are at depth 1 since the wakeup source
511 * is depth 0. If the wakeup source is a previous epoll file in the
512 * wakeup chain then we use its nests value and record ours as
513 * nests + 1. The previous epoll file nests value is stable since its
514 * already holding its own poll_wait.lock.
515 */
516 if (epi) {
517 if ((is_file_epoll(epi->ffd.file))) {
518 ep_src = epi->ffd.file->private_data;
519 nests = ep_src->nests;
520 } else {
521 nests = 1;
522 }
523 }
524 spin_lock_irqsave_nested(&ep->poll_wait.lock, flags, nests);
525 ep->nests = nests + 1;
> 526 wake_up_locked_poll(&ep->poll_wait, EPOLLIN | pollflags);
527 ep->nests = 0;
528 spin_unlock_irqrestore(&ep->poll_wait.lock, flags);
529 }
530
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 4+ messages in thread
* fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
@ 2023-10-31 22:20 kernel test robot
0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2023-10-31 22:20 UTC (permalink / raw)
To: Jens Axboe; +Cc: oe-kbuild-all, linux-kernel
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 5a6a09e97199d6600d31383055f9d43fbbcbe86f
commit: caf1aeaffc3b09649a56769e559333ae2c4f1802 eventpoll: add EPOLL_URING_WAKE poll wakeup flag
date: 11 months ago
config: x86_64-randconfig-r031-20230909 (https://download.01.org/0day-ci/archive/20231101/202311010654.LEo7oBW4-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231101/202311010654.LEo7oBW4-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/oe-kbuild-all/202311010654.LEo7oBW4-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
>> fs/eventpoll.c:526:9: sparse: sparse: cast to restricted __poll_t
>> fs/eventpoll.c:1213:53: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected unsigned int pollflags @@ got restricted __poll_t @@
fs/eventpoll.c:1213:53: sparse: expected unsigned int pollflags
fs/eventpoll.c:1213:53: sparse: got restricted __poll_t
vim +526 fs/eventpoll.c
493
494 static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi,
495 unsigned pollflags)
496 {
497 struct eventpoll *ep_src;
498 unsigned long flags;
499 u8 nests = 0;
500
501 /*
502 * To set the subclass or nesting level for spin_lock_irqsave_nested()
503 * it might be natural to create a per-cpu nest count. However, since
504 * we can recurse on ep->poll_wait.lock, and a non-raw spinlock can
505 * schedule() in the -rt kernel, the per-cpu variable are no longer
506 * protected. Thus, we are introducing a per eventpoll nest field.
507 * If we are not being call from ep_poll_callback(), epi is NULL and
508 * we are at the first level of nesting, 0. Otherwise, we are being
509 * called from ep_poll_callback() and if a previous wakeup source is
510 * not an epoll file itself, we are at depth 1 since the wakeup source
511 * is depth 0. If the wakeup source is a previous epoll file in the
512 * wakeup chain then we use its nests value and record ours as
513 * nests + 1. The previous epoll file nests value is stable since its
514 * already holding its own poll_wait.lock.
515 */
516 if (epi) {
517 if ((is_file_epoll(epi->ffd.file))) {
518 ep_src = epi->ffd.file->private_data;
519 nests = ep_src->nests;
520 } else {
521 nests = 1;
522 }
523 }
524 spin_lock_irqsave_nested(&ep->poll_wait.lock, flags, nests);
525 ep->nests = nests + 1;
> 526 wake_up_locked_poll(&ep->poll_wait, EPOLLIN | pollflags);
527 ep->nests = 0;
528 spin_unlock_irqrestore(&ep->poll_wait.lock, flags);
529 }
530
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 4+ messages in thread
* fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
@ 2024-01-06 20:19 kernel test robot
0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2024-01-06 20:19 UTC (permalink / raw)
To: Jens Axboe; +Cc: oe-kbuild-all, linux-kernel
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 95c8a35f1c017327eab3b6a2ff5c04255737c856
commit: caf1aeaffc3b09649a56769e559333ae2c4f1802 eventpoll: add EPOLL_URING_WAKE poll wakeup flag
date: 1 year, 2 months ago
config: i386-randconfig-063-20240105 (https://download.01.org/0day-ci/archive/20240107/202401070458.AoQY32kd-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240107/202401070458.AoQY32kd-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/oe-kbuild-all/202401070458.AoQY32kd-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
>> fs/eventpoll.c:526:9: sparse: sparse: cast to restricted __poll_t
>> fs/eventpoll.c:1213:53: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected unsigned int pollflags @@ got restricted __poll_t @@
fs/eventpoll.c:1213:53: sparse: expected unsigned int pollflags
fs/eventpoll.c:1213:53: sparse: got restricted __poll_t
vim +526 fs/eventpoll.c
493
494 static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi,
495 unsigned pollflags)
496 {
497 struct eventpoll *ep_src;
498 unsigned long flags;
499 u8 nests = 0;
500
501 /*
502 * To set the subclass or nesting level for spin_lock_irqsave_nested()
503 * it might be natural to create a per-cpu nest count. However, since
504 * we can recurse on ep->poll_wait.lock, and a non-raw spinlock can
505 * schedule() in the -rt kernel, the per-cpu variable are no longer
506 * protected. Thus, we are introducing a per eventpoll nest field.
507 * If we are not being call from ep_poll_callback(), epi is NULL and
508 * we are at the first level of nesting, 0. Otherwise, we are being
509 * called from ep_poll_callback() and if a previous wakeup source is
510 * not an epoll file itself, we are at depth 1 since the wakeup source
511 * is depth 0. If the wakeup source is a previous epoll file in the
512 * wakeup chain then we use its nests value and record ours as
513 * nests + 1. The previous epoll file nests value is stable since its
514 * already holding its own poll_wait.lock.
515 */
516 if (epi) {
517 if ((is_file_epoll(epi->ffd.file))) {
518 ep_src = epi->ffd.file->private_data;
519 nests = ep_src->nests;
520 } else {
521 nests = 1;
522 }
523 }
524 spin_lock_irqsave_nested(&ep->poll_wait.lock, flags, nests);
525 ep->nests = nests + 1;
> 526 wake_up_locked_poll(&ep->poll_wait, EPOLLIN | pollflags);
527 ep->nests = 0;
528 spin_unlock_irqrestore(&ep->poll_wait.lock, flags);
529 }
530
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 4+ messages in thread
* fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
@ 2024-01-09 4:45 kernel test robot
0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2024-01-09 4:45 UTC (permalink / raw)
To: Jens Axboe; +Cc: oe-kbuild-all, linux-kernel
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f0a78b3e2a0c842cc7b4c2686f4a35681f02ca72
commit: caf1aeaffc3b09649a56769e559333ae2c4f1802 eventpoll: add EPOLL_URING_WAKE poll wakeup flag
date: 1 year, 2 months ago
config: i386-randconfig-063-20240105 (https://download.01.org/0day-ci/archive/20240109/202401091221.cupISW8z-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240109/202401091221.cupISW8z-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/oe-kbuild-all/202401091221.cupISW8z-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> fs/eventpoll.c:526:9: sparse: sparse: restricted __poll_t degrades to integer
>> fs/eventpoll.c:526:9: sparse: sparse: cast to restricted __poll_t
>> fs/eventpoll.c:1213:53: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected unsigned int pollflags @@ got restricted __poll_t @@
fs/eventpoll.c:1213:53: sparse: expected unsigned int pollflags
fs/eventpoll.c:1213:53: sparse: got restricted __poll_t
vim +526 fs/eventpoll.c
493
494 static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi,
495 unsigned pollflags)
496 {
497 struct eventpoll *ep_src;
498 unsigned long flags;
499 u8 nests = 0;
500
501 /*
502 * To set the subclass or nesting level for spin_lock_irqsave_nested()
503 * it might be natural to create a per-cpu nest count. However, since
504 * we can recurse on ep->poll_wait.lock, and a non-raw spinlock can
505 * schedule() in the -rt kernel, the per-cpu variable are no longer
506 * protected. Thus, we are introducing a per eventpoll nest field.
507 * If we are not being call from ep_poll_callback(), epi is NULL and
508 * we are at the first level of nesting, 0. Otherwise, we are being
509 * called from ep_poll_callback() and if a previous wakeup source is
510 * not an epoll file itself, we are at depth 1 since the wakeup source
511 * is depth 0. If the wakeup source is a previous epoll file in the
512 * wakeup chain then we use its nests value and record ours as
513 * nests + 1. The previous epoll file nests value is stable since its
514 * already holding its own poll_wait.lock.
515 */
516 if (epi) {
517 if ((is_file_epoll(epi->ffd.file))) {
518 ep_src = epi->ffd.file->private_data;
519 nests = ep_src->nests;
520 } else {
521 nests = 1;
522 }
523 }
524 spin_lock_irqsave_nested(&ep->poll_wait.lock, flags, nests);
525 ep->nests = nests + 1;
> 526 wake_up_locked_poll(&ep->poll_wait, EPOLLIN | pollflags);
527 ep->nests = 0;
528 spin_unlock_irqrestore(&ep->poll_wait.lock, flags);
529 }
530
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 4+ messages in thread
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