From: kernel test robot <lkp@intel.com>
To: elver@google.com
Cc: oe-kbuild-all@lists.linux.dev
Subject: [melver:cap-analysis/dev 14/26] drivers/dma-buf/dma-fence-chain.c:65:21: sparse: sparse: incorrect type in assignment (different base types)
Date: Fri, 14 Feb 2025 00:32:34 +0800 [thread overview]
Message-ID: <202502140014.CYel5X8d-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git cap-analysis/dev
head: 9c8d14ce8aff2d38bf494f5d5436a302e3236842
commit: f7039fb7b3a9459a6c5ed166c267bdf294492c1b [14/26] rcu: Support Clang's capability analysis
config: arc-randconfig-r112-20250213 (https://download.01.org/0day-ci/archive/20250214/202502140014.CYel5X8d-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250214/202502140014.CYel5X8d-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/202502140014.CYel5X8d-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> drivers/dma-buf/dma-fence-chain.c:65:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected struct dma_fence *tmp @@ got void @@
drivers/dma-buf/dma-fence-chain.c:65:21: sparse: expected struct dma_fence *tmp
drivers/dma-buf/dma-fence-chain.c:65:21: sparse: got void
vim +65 drivers/dma-buf/dma-fence-chain.c
7bf60c52e093d9 Christian König 2019-04-01 30
7bf60c52e093d9 Christian König 2019-04-01 31 /**
7bf60c52e093d9 Christian König 2019-04-01 32 * dma_fence_chain_walk - chain walking function
7bf60c52e093d9 Christian König 2019-04-01 33 * @fence: current chain node
7bf60c52e093d9 Christian König 2019-04-01 34 *
7bf60c52e093d9 Christian König 2019-04-01 35 * Walk the chain to the next node. Returns the next fence or NULL if we are at
7bf60c52e093d9 Christian König 2019-04-01 36 * the end of the chain. Garbage collects chain nodes which are already
7bf60c52e093d9 Christian König 2019-04-01 37 * signaled.
7bf60c52e093d9 Christian König 2019-04-01 38 */
7bf60c52e093d9 Christian König 2019-04-01 39 struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence)
7bf60c52e093d9 Christian König 2019-04-01 40 {
7bf60c52e093d9 Christian König 2019-04-01 41 struct dma_fence_chain *chain, *prev_chain;
7bf60c52e093d9 Christian König 2019-04-01 42 struct dma_fence *prev, *replacement, *tmp;
7bf60c52e093d9 Christian König 2019-04-01 43
7bf60c52e093d9 Christian König 2019-04-01 44 chain = to_dma_fence_chain(fence);
7bf60c52e093d9 Christian König 2019-04-01 45 if (!chain) {
7bf60c52e093d9 Christian König 2019-04-01 46 dma_fence_put(fence);
7bf60c52e093d9 Christian König 2019-04-01 47 return NULL;
7bf60c52e093d9 Christian König 2019-04-01 48 }
7bf60c52e093d9 Christian König 2019-04-01 49
7bf60c52e093d9 Christian König 2019-04-01 50 while ((prev = dma_fence_chain_get_prev(chain))) {
7bf60c52e093d9 Christian König 2019-04-01 51
7bf60c52e093d9 Christian König 2019-04-01 52 prev_chain = to_dma_fence_chain(prev);
7bf60c52e093d9 Christian König 2019-04-01 53 if (prev_chain) {
7bf60c52e093d9 Christian König 2019-04-01 54 if (!dma_fence_is_signaled(prev_chain->fence))
7bf60c52e093d9 Christian König 2019-04-01 55 break;
7bf60c52e093d9 Christian König 2019-04-01 56
7bf60c52e093d9 Christian König 2019-04-01 57 replacement = dma_fence_chain_get_prev(prev_chain);
7bf60c52e093d9 Christian König 2019-04-01 58 } else {
7bf60c52e093d9 Christian König 2019-04-01 59 if (!dma_fence_is_signaled(prev))
7bf60c52e093d9 Christian König 2019-04-01 60 break;
7bf60c52e093d9 Christian König 2019-04-01 61
7bf60c52e093d9 Christian König 2019-04-01 62 replacement = NULL;
7bf60c52e093d9 Christian König 2019-04-01 63 }
7bf60c52e093d9 Christian König 2019-04-01 64
14374e3eee1b02 Christian König 2022-05-11 @65 tmp = unrcu_pointer(cmpxchg(&chain->prev, RCU_INITIALIZER(prev),
14374e3eee1b02 Christian König 2022-05-11 66 RCU_INITIALIZER(replacement)));
7bf60c52e093d9 Christian König 2019-04-01 67 if (tmp == prev)
7bf60c52e093d9 Christian König 2019-04-01 68 dma_fence_put(tmp);
7bf60c52e093d9 Christian König 2019-04-01 69 else
7bf60c52e093d9 Christian König 2019-04-01 70 dma_fence_put(replacement);
7bf60c52e093d9 Christian König 2019-04-01 71 dma_fence_put(prev);
7bf60c52e093d9 Christian König 2019-04-01 72 }
7bf60c52e093d9 Christian König 2019-04-01 73
7bf60c52e093d9 Christian König 2019-04-01 74 dma_fence_put(fence);
7bf60c52e093d9 Christian König 2019-04-01 75 return prev;
7bf60c52e093d9 Christian König 2019-04-01 76 }
7bf60c52e093d9 Christian König 2019-04-01 77 EXPORT_SYMBOL(dma_fence_chain_walk);
7bf60c52e093d9 Christian König 2019-04-01 78
:::::: The code at line 65 was first introduced by commit
:::::: 14374e3eee1b02dbf162e1dd75b789373f07ef43 dma-buf: cleanup dma_fence_chain_walk
:::::: TO: Christian König <christian.koenig@amd.com>
:::::: CC: Christian König <christian.koenig@amd.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2025-02-13 16:32 UTC|newest]
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