Re: [PATCH net v3] rds: filter RDS_INFO_* getsockopt by caller's netns

[kernel test robot <lkp@intel.com>]

Hi Maoyi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on b266bacba796ff5c4dcd2ae2fc08aacf7ab39153]

url:    https://github.com/intel-lab-lkp/linux/commits/Maoyi-Xie/rds-filter-RDS_INFO_-getsockopt-by-caller-s-netns/20260512-045249
base:   b266bacba796ff5c4dcd2ae2fc08aacf7ab39153
patch link:    https://lore.kernel.org/r/20260511070211.1033178-1-maoyi.xie%40ntu.edu.sg
patch subject: [PATCH net v3] rds: filter RDS_INFO_* getsockopt by caller's netns
config: arm-randconfig-001-20260512 (https://download.01.org/0day-ci/archive/20260512/202605121353.896RQym5-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260512/202605121353.896RQym5-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/202605121353.896RQym5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from net/rds/tcp.c:42:
   In file included from net/rds/rds.h:10:
   include/uapi/linux/rds.h:233:18: warning: field peer_addr within 'struct rds6_info_tcp_socket' is less aligned than 'struct in6_addr' and is usually due to 'struct rds6_info_tcp_socket' being packed, which can lead to unaligned accesses [-Wunaligned-access]
     233 |         struct in6_addr peer_addr;
         |                         ^
>> net/rds/tcp.c:52:21: warning: variable 'rds_tcp_tc_count' set but not used [-Wunused-but-set-global]
      52 | static unsigned int rds_tcp_tc_count;
         |                     ^
>> net/rds/tcp.c:54:21: warning: variable 'rds6_tcp_tc_count' set but not used [-Wunused-but-set-global]
      54 | static unsigned int rds6_tcp_tc_count;
         |                     ^
   3 warnings generated.
--
>> net/rds/af_rds.c:46:22: warning: variable 'rds_sock_count' set but not used [-Wunused-but-set-global]
      46 | static unsigned long rds_sock_count;
         |                      ^
   1 warning generated.


vim +/rds_tcp_tc_count +52 net/rds/tcp.c

70041088e3b9766 Andy Grover       2009-08-21  41  
70041088e3b9766 Andy Grover       2009-08-21 @42  #include "rds.h"
70041088e3b9766 Andy Grover       2009-08-21  43  #include "tcp.h"
70041088e3b9766 Andy Grover       2009-08-21  44  
70041088e3b9766 Andy Grover       2009-08-21  45  /* only for info exporting */
70041088e3b9766 Andy Grover       2009-08-21  46  static DEFINE_SPINLOCK(rds_tcp_tc_list_lock);
70041088e3b9766 Andy Grover       2009-08-21  47  static LIST_HEAD(rds_tcp_tc_list);
1e2b44e78eead7b Ka-Cheong Poon    2018-07-23  48  
1e2b44e78eead7b Ka-Cheong Poon    2018-07-23  49  /* rds_tcp_tc_count counts only IPv4 connections.
1e2b44e78eead7b Ka-Cheong Poon    2018-07-23  50   * rds6_tcp_tc_count counts both IPv4 and IPv6 connections.
1e2b44e78eead7b Ka-Cheong Poon    2018-07-23  51   */
ff51bf841587c75 stephen hemminger 2010-10-19 @52  static unsigned int rds_tcp_tc_count;
e65d4d96334e3ff Ka-Cheong Poon    2018-07-30  53  #if IS_ENABLED(CONFIG_IPV6)
1e2b44e78eead7b Ka-Cheong Poon    2018-07-23 @54  static unsigned int rds6_tcp_tc_count;
e65d4d96334e3ff Ka-Cheong Poon    2018-07-30  55  #endif
70041088e3b9766 Andy Grover       2009-08-21  56  

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