Hi Christian, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.0 next-20190306] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Chunming-Zhou/dma-buf-add-new-dma_fence_chain-container-v5/20190313-080623 reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' All warnings (new ones prefixed by >>): >> drivers/dma-buf/dma-fence-chain.c:34:40: sparse: warning: incorrect type in argument 1 (different address spaces) drivers/dma-buf/dma-fence-chain.c:34:40: sparse: expected struct dma_fence [noderef] <asn:4> **fencep drivers/dma-buf/dma-fence-chain.c:34:40: sparse: got struct dma_fence ** sparse warnings: (new ones prefixed by >>) drivers/dma-buf/dma-fence-chain.c:34:40: sparse: warning: incorrect type in argument 1 (different address spaces) >> drivers/dma-buf/dma-fence-chain.c:34:40: sparse: expected struct dma_fence [noderef] <asn:4> **fencep >> drivers/dma-buf/dma-fence-chain.c:34:40: sparse: got struct dma_fence ** vim +34 drivers/dma-buf/dma-fence-chain.c 21 22 /** 23 * dma_fence_chain_get_prev - use RCU to get a reference to the previous fence 24 * @chain: chain node to get the previous node from 25 * 26 * Use dma_fence_get_rcu_safe to get a reference to the previous fence of the 27 * chain node. 28 */ 29 static struct dma_fence *dma_fence_chain_get_prev(struct dma_fence_chain *chain) 30 { 31 struct dma_fence *prev; 32 33 rcu_read_lock(); > 34 prev = dma_fence_get_rcu_safe(&chain->prev); 35 rcu_read_unlock(); 36 return prev; 37 } 38 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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