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Message-ID: <202408281628.FtNGguag-lkp@intel.com>
Date: Wed, 28 Aug 2024 16:17:50 +0800
From: kernel test robot <lkp@...el.com>
To: Hongbo Li <lihongbo22@...wei.com>, johannes@...solutions.net,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, allison.henderson@...cle.com, dsahern@...nel.org,
pshelar@....org
Cc: oe-kbuild-all@...ts.linux.dev, linux-wireless@...r.kernel.org,
netdev@...r.kernel.org, rds-devel@....oracle.com,
dccp@...r.kernel.org, dev@...nvswitch.org,
linux-afs@...ts.infradead.org, lihongbo22@...wei.com
Subject: Re: [PATCH net-next 4/8] net/core: Use min()/max() to simplify the
code
Hi Hongbo,
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/Hongbo-Li/net-mac80211-use-max-to-simplify-the-code/20240826-154029
base: net-next/main
patch link: https://lore.kernel.org/r/20240824074033.2134514-5-lihongbo22%40huawei.com
patch subject: [PATCH net-next 4/8] net/core: Use min()/max() to simplify the code
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20240828/202408281628.FtNGguag-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240828/202408281628.FtNGguag-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/202408281628.FtNGguag-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from <command-line>:
net/core/pktgen.c: In function 'pktgen_finalize_skb':
>> include/linux/compiler_types.h:510:45: error: call to '__compiletime_assert_991' declared with attribute error: min(datalen/frags, (1UL << 16)) signedness error
510 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:491:25: note: in definition of macro '__compiletime_assert'
491 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:510:9: note: in expansion of macro '_compiletime_assert'
510 | _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/minmax.h:100:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
100 | BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:105:9: note: in expansion of macro '__careful_cmp_once'
105 | __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ^~~~~~~~~~~~~~~~~~
include/linux/minmax.h:129:25: note: in expansion of macro '__careful_cmp'
129 | #define min(x, y) __careful_cmp(min, x, y)
| ^~~~~~~~~~~~~
net/core/pktgen.c:2796:28: note: in expansion of macro 'min'
2796 | frag_len = min(datalen/frags, PAGE_SIZE);
| ^~~
vim +/__compiletime_assert_991 +510 include/linux/compiler_types.h
eb5c2d4b45e3d2 Will Deacon 2020-07-21 496
eb5c2d4b45e3d2 Will Deacon 2020-07-21 497 #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 498 __compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 499
eb5c2d4b45e3d2 Will Deacon 2020-07-21 500 /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21 501 * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 502 * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21 503 * @msg: a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 504 *
eb5c2d4b45e3d2 Will Deacon 2020-07-21 505 * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 506 * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 507 * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21 508 */
eb5c2d4b45e3d2 Will Deacon 2020-07-21 509 #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @510 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 511
--
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