netdev - Re: [PATCH net-next v10 15/15] net: homa: create Makefile and Kconfig

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Message-ID: <202507050104.p9sjOlBX-lkp@intel.com>
Date: Sat, 5 Jul 2025 01:30:24 +0800
From: kernel test robot <lkp@...el.com>
To: John Ousterhout <ouster@...stanford.edu>, netdev@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, pabeni@...hat.com, edumazet@...gle.com,
	horms@...nel.org, kuba@...nel.org,
	John Ousterhout <ouster@...stanford.edu>
Subject: Re: [PATCH net-next v10 15/15] net: homa: create Makefile and Kconfig

Hi John,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/John-Ousterhout/net-homa-define-user-visible-API-for-Homa/20250703-113049
base:   net-next/main
patch link:    https://lore.kernel.org/r/20250703031445.569-16-ouster%40cs.stanford.edu
patch subject: [PATCH net-next v10 15/15] net: homa: create Makefile and Kconfig
config: arc-allmodconfig (https://download.01.org/0day-ci/archive/20250705/202507050104.p9sjOlBX-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250705/202507050104.p9sjOlBX-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507050104.p9sjOlBX-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   net/homa/homa_plumbing.c: In function 'homa_load':
>> include/linux/compiler_types.h:568:45: error: call to '__compiletime_assert_981' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct homa_recvmsg_args) != 88
     568 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:549:25: note: in definition of macro '__compiletime_assert'
     549 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:568:9: note: in expansion of macro '_compiletime_assert'
     568 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^~~~~~~~~~~~~~~~
   net/homa/homa_plumbing.c:216:9: note: in expansion of macro 'BUILD_BUG_ON'
     216 |         BUILD_BUG_ON(sizeof(struct homa_recvmsg_args) != 88);
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_981 +568 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  554  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  555  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  556  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  557  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  558  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  559   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  560   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  561   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  562   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  563   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  564   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  565   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  566   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  567  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @568  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  569  

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