Re: [RFC PATCH 39/39] sysctl: remove the extra pointers and the compatibility bounds read

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

Hi,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[cannot apply to sysctl/sysctl-next brauner-vfs/vfs.all linus/master mcgrof/sysctl-next v7.3 next-20261030]
[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/wen-yang-linux-dev/sysctl-replace-overloaded-extra-pointers-with-typed-bounds-and-context/20261029-003440
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/b6e4cbd509687301a8ee2106f19a3ac01e7671a6.1793204511.git.wen.yang%40linux.dev
patch subject: [RFC PATCH 39/39] sysctl: remove the extra pointers and the compatibility bounds read
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20261104/202611041241.bvJjCVUH-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261104/202611041241.bvJjCVUH-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/202611041241.bvJjCVUH-lkp@intel.com/

All errors (new ones prefixed by >>):

>> net/unix/sysctl_net_unix.c:23:18: error: 'const struct ctl_table' has no member named 'extra1'
      23 |                 .extra1         = SYSCTL_ZERO,
         |                  ^~~~~~
   In file included from net/unix/sysctl_net_unix.c:10:
>> include/linux/sysctl.h:41:41: error: positional initialization of field in 'struct' declared with 'designated_init' attribute [-Werror=designated-init]
      41 | #define SYSCTL_ZERO                     0
         |                                         ^
   net/unix/sysctl_net_unix.c:23:35: note: in expansion of macro 'SYSCTL_ZERO'
      23 |                 .extra1         = SYSCTL_ZERO,
         |                                   ^~~~~~~~~~~
   include/linux/sysctl.h:41:41: note: (near initialization for 'unix_table[0]')
      41 | #define SYSCTL_ZERO                     0
         |                                         ^
   net/unix/sysctl_net_unix.c:23:35: note: in expansion of macro 'SYSCTL_ZERO'
      23 |                 .extra1         = SYSCTL_ZERO,
         |                                   ^~~~~~~~~~~
>> net/unix/sysctl_net_unix.c:24:18: error: 'const struct ctl_table' has no member named 'extra2'
      24 |                 .extra2         = SYSCTL_INT_MAX,
         |                  ^~~~~~
   In file included from include/linux/limits.h:7,
                    from include/linux/overflow.h:6,
                    from include/linux/bits.h:32,
                    from include/linux/ratelimit_types.h:5,
                    from include/linux/printk.h:9,
                    from include/asm-generic/bug.h:31,
                    from ./arch/um/include/generated/asm/bug.h:1,
                    from include/linux/bug.h:5,
                    from include/linux/slab.h:15,
                    from net/unix/sysctl_net_unix.c:8:
>> include/vdso/limits.h:8:25: error: positional initialization of field in 'struct' declared with 'designated_init' attribute [-Werror=designated-init]
       8 | #define INT_MAX         ((int)(~0U >> 1))
         |                         ^
   include/linux/sysctl.h:50:41: note: in expansion of macro 'INT_MAX'
      50 | #define SYSCTL_INT_MAX                  INT_MAX
         |                                         ^~~~~~~
   net/unix/sysctl_net_unix.c:24:35: note: in expansion of macro 'SYSCTL_INT_MAX'
      24 |                 .extra2         = SYSCTL_INT_MAX,
         |                                   ^~~~~~~~~~~~~~
   include/vdso/limits.h:8:25: note: (near initialization for 'unix_table[0]')
       8 | #define INT_MAX         ((int)(~0U >> 1))
         |                         ^
   include/linux/sysctl.h:50:41: note: in expansion of macro 'INT_MAX'
      50 | #define SYSCTL_INT_MAX                  INT_MAX
         |                                         ^~~~~~~
   net/unix/sysctl_net_unix.c:24:35: note: in expansion of macro 'SYSCTL_INT_MAX'
      24 |                 .extra2         = SYSCTL_INT_MAX,
         |                                   ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +23 net/unix/sysctl_net_unix.c

84960bf2403123 Kuniyuki Iwashima 2025-03-17  15  
0abc76bc20826e Joel Granados     2026-08-10  16  static const struct ctl_table unix_table[] = {
^1da177e4c3f41 Linus Torvalds    2005-04-16  17  	{
^1da177e4c3f41 Linus Torvalds    2005-04-16  18  		.procname	= "max_dgram_qlen",
a0a53c8ba95451 Denis V. Lunev    2007-12-11  19  		.data		= &init_net.unx.sysctl_max_dgram_qlen,
^1da177e4c3f41 Linus Torvalds    2005-04-16  20  		.maxlen		= sizeof(int),
^1da177e4c3f41 Linus Torvalds    2005-04-16  21  		.mode		= 0644,
1a4e7bc6e3457a Yingjie Wang      2026-10-16  22  		.proc_handler	= proc_dointvec_minmax,
1a4e7bc6e3457a Yingjie Wang      2026-10-16 @23  		.extra1		= SYSCTL_ZERO,
1a4e7bc6e3457a Yingjie Wang      2026-10-16 @24  		.extra2		= SYSCTL_INT_MAX,
^1da177e4c3f41 Linus Torvalds    2005-04-16  25  	},
^1da177e4c3f41 Linus Torvalds    2005-04-16  26  };
^1da177e4c3f41 Linus Torvalds    2005-04-16  27  

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