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Date: Tue, 14 May 2024 02:04:35 +0800
From: kernel test robot <lkp@intel.com>
To: =?iso-8859-1?Q?H=E5kon?= Bugge <haakon.bugge@oracle.com>,
	linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, rds-devel@oss.oracle.com
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>,
	Saeed Mahameed <saeedm@nvidia.com>,
	Tariq Toukan <tariqt@nvidia.com>,
	"David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Tejun Heo <tj@kernel.org>, Lai Jiangshan <jiangshanlai@gmail.com>,
	Allison Henderson <allison.henderson@oracle.com>,
	Manjunath Patil <manjunath.b.patil@oracle.com>,
	Mark Zhang <markzhang@nvidia.com>,
	=?iso-8859-1?Q?H=E5kon?= Bugge <haakon.bugge@oracle.com>,
	Chuck Lever <chuck.lever@oracle.com>,
	Shiraz Saleem <shiraz.saleem@intel.com>,
	Yang Li <yang.lee@linux.alibaba.com>
Subject: Re: [PATCH 2/6] rds: Brute force GFP_NOIO
Message-ID: <202405140136.LE0Nk9by-lkp@intel.com>
References: <20240513125346.764076-3-haakon.bugge@oracle.com>
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In-Reply-To: <20240513125346.764076-3-haakon.bugge@oracle.com>

Hi H?kon,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tj-wq/for-next]
[also build test WARNING on rdma/for-next net/main net-next/main linus/master v6.9 next-20240513]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/H-kon-Bugge/workqueue-Inherit-NOIO-and-NOFS-alloc-flags/20240513-205927
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-next
patch link:    https://lore.kernel.org/r/20240513125346.764076-3-haakon.bugge%40oracle.com
patch subject: [PATCH 2/6] rds: Brute force GFP_NOIO
config: s390-defconfig (https://download.01.org/0day-ci/archive/20240514/202405140136.LE0Nk9by-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project b910bebc300dafb30569cecc3017b446ea8eafa0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240514/202405140136.LE0Nk9by-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/202405140136.LE0Nk9by-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from net/rds/af_rds.c:33:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:173:
   In file included from arch/s390/include/asm/mmu_context.h:11:
   In file included from arch/s390/include/asm/pgalloc.h:18:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     508 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     509 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     515 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     516 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     527 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     528 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     536 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     537 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   In file included from net/rds/af_rds.c:38:
   In file included from include/linux/ipv6.h:101:
   In file included from include/linux/tcp.h:17:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
         |                                                           ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
     102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
         |                                                      ^
   In file included from net/rds/af_rds.c:38:
   In file included from include/linux/ipv6.h:101:
   In file included from include/linux/tcp.h:17:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
         |                                                           ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
     115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
         |                                                      ^
   In file included from net/rds/af_rds.c:38:
   In file included from include/linux/ipv6.h:101:
   In file included from include/linux/tcp.h:17:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     692 |         readsb(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     700 |         readsw(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     708 |         readsl(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     717 |         writesb(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     726 |         writesw(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     735 |         writesl(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
>> net/rds/af_rds.c:315:15: warning: variable 'noio_flags' set but not used [-Wunused-but-set-variable]
     315 |         unsigned int noio_flags;
         |                      ^
   18 warnings generated.


vim +/noio_flags +315 net/rds/af_rds.c

   310	
   311	static int rds_cancel_sent_to(struct rds_sock *rs, sockptr_t optval, int len)
   312	{
   313		struct sockaddr_in6 sin6;
   314		struct sockaddr_in sin;
 > 315		unsigned int noio_flags;
   316		int ret = 0;
   317	
   318		if (rds_force_noio)
   319			noio_flags = memalloc_noio_save();
   320	
   321		/* racing with another thread binding seems ok here */
   322		if (ipv6_addr_any(&rs->rs_bound_addr)) {
   323			ret = -ENOTCONN; /* XXX not a great errno */
   324			goto out;
   325		}
   326	
   327		if (len < sizeof(struct sockaddr_in)) {
   328			ret = -EINVAL;
   329			goto out;
   330		} else if (len < sizeof(struct sockaddr_in6)) {
   331			/* Assume IPv4 */
   332			if (copy_from_sockptr(&sin, optval,
   333					sizeof(struct sockaddr_in))) {
   334				ret = -EFAULT;
   335				goto out;
   336			}
   337			ipv6_addr_set_v4mapped(sin.sin_addr.s_addr, &sin6.sin6_addr);
   338			sin6.sin6_port = sin.sin_port;
   339		} else {
   340			if (copy_from_sockptr(&sin6, optval,
   341					   sizeof(struct sockaddr_in6))) {
   342				ret = -EFAULT;
   343				goto out;
   344			}
   345		}
   346	
   347		rds_send_drop_to(rs, &sin6);
   348	out:
   349		if (rds_force_noio)
   350			noio_flags = memalloc_noio_save();
   351		return ret;
   352	}
   353	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki