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Message-ID: <20250516080704.GA56738@system.software.com>
Date: Fri, 16 May 2025 17:07:04 +0900
From: Byungchul Park <byungchul@...com>
To: kernel test robot <lkp@...el.com>
Cc: linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
oe-kbuild-all@...ts.linux.dev, kernel_team@...ynix.com,
torvalds@...ux-foundation.org, damien.lemoal@...nsource.wdc.com,
linux-ide@...r.kernel.org, adilger.kernel@...ger.ca,
linux-ext4@...r.kernel.org, mingo@...hat.com, peterz@...radead.org,
will@...nel.org, tglx@...utronix.de, rostedt@...dmis.org,
joel@...lfernandes.org, sashal@...nel.org, daniel.vetter@...ll.ch,
duyuyang@...il.com, johannes.berg@...el.com, tj@...nel.org,
tytso@....edu, willy@...radead.org, david@...morbit.com,
amir73il@...il.com, gregkh@...uxfoundation.org, kernel-team@....com,
linux-mm@...ck.org, akpm@...ux-foundation.org, mhocko@...nel.org,
minchan@...nel.org, hannes@...xchg.org, vdavydov.dev@...il.com
Subject: Re: [PATCH v15 33/43] dept: assign unique dept_key to each distinct
dma fence caller
On Wed, May 14, 2025 at 06:49:42AM +0800, kernel test robot wrote:
> Hi Byungchul,
>
> kernel test robot noticed the following build warnings:
>
> [auto build test WARNING on 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3]
>
> url: https://github.com/intel-lab-lkp/linux/commits/Byungchul-Park/llist-move-llist_-head-node-definition-to-types-h/20250513-181346
> base: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3
> patch link: https://lore.kernel.org/r/20250513100730.12664-34-byungchul%40sk.com
> patch subject: [PATCH v15 33/43] dept: assign unique dept_key to each distinct dma fence caller
> config: arm-randconfig-002-20250514 (https://download.01.org/0day-ci/archive/20250514/202505140631.FOWO8B5L-lkp@intel.com/config)
> compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250514/202505140631.FOWO8B5L-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@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202505140631.FOWO8B5L-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/dma-buf/dma-fence.c:503: warning: expecting prototype for dma_fence_wait_timeout(). Prototype was for __dma_fence_wait_timeout() instead
> >> drivers/dma-buf/dma-fence.c:763: warning: expecting prototype for dma_fence_default_wait(). Prototype was for __dma_fence_default_wait() instead
> >> drivers/dma-buf/dma-fence.c:853: warning: expecting prototype for dma_fence_wait_any_timeout(). Prototype was for __dma_fence_wait_any_timeout() instead
I have just fixed it. Thanks.
Byungchul
>
> vim +503 drivers/dma-buf/dma-fence.c
>
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 482
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 483 /**
> f54d1867005c33 drivers/dma-buf/dma-fence.c Chris Wilson 2016-10-25 484 * dma_fence_wait_timeout - sleep until the fence gets signaled
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 485 * or until timeout elapses
> 4dd3cdb281f7a3 drivers/dma-buf/dma-fence.c Simona Vetter 2018-07-04 486 * @fence: the fence to wait on
> 4dd3cdb281f7a3 drivers/dma-buf/dma-fence.c Simona Vetter 2018-07-04 487 * @intr: if true, do an interruptible wait
> 4dd3cdb281f7a3 drivers/dma-buf/dma-fence.c Simona Vetter 2018-07-04 488 * @timeout: timeout value in jiffies, or MAX_SCHEDULE_TIMEOUT
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 489 *
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 490 * Returns -ERESTARTSYS if interrupted, 0 if the wait timed out, or the
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 491 * remaining timeout in jiffies on success. Other error values may be
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 492 * returned on custom implementations.
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 493 *
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 494 * Performs a synchronous wait on this fence. It is assumed the caller
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 495 * directly or indirectly (buf-mgr between reservation and committing)
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 496 * holds a reference to the fence, otherwise the fence might be
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 497 * freed before return, resulting in undefined behavior.
> 4dd3cdb281f7a3 drivers/dma-buf/dma-fence.c Simona Vetter 2018-07-04 498 *
> 4dd3cdb281f7a3 drivers/dma-buf/dma-fence.c Simona Vetter 2018-07-04 499 * See also dma_fence_wait() and dma_fence_wait_any_timeout().
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 500 */
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 501 signed long
> 15fe92c1e1cf69 drivers/dma-buf/dma-fence.c Byungchul Park 2025-05-13 502 __dma_fence_wait_timeout(struct dma_fence *fence, bool intr, signed long timeout)
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 @503 {
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 504 signed long ret;
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 505
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 506 if (WARN_ON(timeout < 0))
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 507 return -EINVAL;
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 508
> ef8255506f6682 drivers/dma-buf/dma-fence.c Simona Vetter 2020-05-19 509 might_sleep();
> ef8255506f6682 drivers/dma-buf/dma-fence.c Simona Vetter 2020-05-19 510
> 5fbff813a4a328 drivers/dma-buf/dma-fence.c Simona Vetter 2020-07-07 511 __dma_fence_might_wait();
> 5fbff813a4a328 drivers/dma-buf/dma-fence.c Simona Vetter 2020-07-07 512
> b96fb1e724ae68 drivers/dma-buf/dma-fence.c Arvind Yadav 2022-09-14 513 dma_fence_enable_sw_signaling(fence);
> b96fb1e724ae68 drivers/dma-buf/dma-fence.c Arvind Yadav 2022-09-14 514
> f54d1867005c33 drivers/dma-buf/dma-fence.c Chris Wilson 2016-10-25 515 trace_dma_fence_wait_start(fence);
> 418cc6ca06071e drivers/dma-buf/dma-fence.c Simona Vetter 2018-05-03 516 if (fence->ops->wait)
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 517 ret = fence->ops->wait(fence, intr, timeout);
> 418cc6ca06071e drivers/dma-buf/dma-fence.c Simona Vetter 2018-05-03 518 else
> 418cc6ca06071e drivers/dma-buf/dma-fence.c Simona Vetter 2018-05-03 519 ret = dma_fence_default_wait(fence, intr, timeout);
> f54d1867005c33 drivers/dma-buf/dma-fence.c Chris Wilson 2016-10-25 520 trace_dma_fence_wait_end(fence);
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 521 return ret;
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 522 }
> 15fe92c1e1cf69 drivers/dma-buf/dma-fence.c Byungchul Park 2025-05-13 523 EXPORT_SYMBOL(__dma_fence_wait_timeout);
> e941759c74a44d drivers/dma-buf/fence.c Maarten Lankhorst 2014-07-01 524
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
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