include/linux/compiler_types.h:322:45: error: call to '__compiletime_assert_355' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct prestera_msg_event_fdb) != 20

From: kernel test robot
Date: Fri Jan 14 2022 - 19:53:39 EST


Hi Volodymyr,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 112450df61b7373529b0fe4c122ad13b89d80a8a
commit: bb5dbf2cc64d5cfa696765944c784c0010c48ae8 net: marvell: prestera: add firmware v4.0 support
date: 3 months ago
config: arm-randconfig-r006-20220115 (https://download.01.org/0day-ci/archive/20220115/202201150856.uvqiyjjG-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bb5dbf2cc64d5cfa696765944c784c0010c48ae8
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout bb5dbf2cc64d5cfa696765944c784c0010c48ae8
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/ethernet/marvell/prestera/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

drivers/net/ethernet/marvell/prestera/prestera_hw.c:284:1: warning: alignment 1 of 'union prestera_msg_port_param' is less than 4 [-Wpacked-not-aligned]
284 | } __packed;
| ^
In file included from <command-line>:
In function 'prestera_hw_build_tests',
inlined from 'prestera_hw_switch_init' at drivers/net/ethernet/marvell/prestera/prestera_hw.c:788:2:
>> include/linux/compiler_types.h:322:45: error: call to '__compiletime_assert_355' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct prestera_msg_event_fdb) != 20
322 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:303:25: note: in definition of macro '__compiletime_assert'
303 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:322:9: note: in expansion of macro '_compiletime_assert'
322 | _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)
| ^~~~~~~~~~~~~~~~
drivers/net/ethernet/marvell/prestera/prestera_hw.c:531:9: note: in expansion of macro 'BUILD_BUG_ON'
531 | BUILD_BUG_ON(sizeof(struct prestera_msg_event_fdb) != 20);
| ^~~~~~~~~~~~


vim +/__compiletime_assert_355 +322 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21 308
eb5c2d4b45e3d2 Will Deacon 2020-07-21 309 #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 310 __compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 311
eb5c2d4b45e3d2 Will Deacon 2020-07-21 312 /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21 313 * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 314 * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21 315 * @msg: a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 316 *
eb5c2d4b45e3d2 Will Deacon 2020-07-21 317 * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 318 * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 319 * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21 320 */
eb5c2d4b45e3d2 Will Deacon 2020-07-21 321 #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @322 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 323

:::::: The code at line 322 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h

:::::: TO: Will Deacon <will@xxxxxxxxxx>
:::::: CC: Will Deacon <will@xxxxxxxxxx>

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