From: Hyeonggon Yoo <42.hyeyoo@gmail.com>
To: kernel test robot <lkp@intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-mm@kvack.org
Subject: Re: [vbabka-slab:for-6.1/fit_rcu_head 2/2] mm/slab.h:94:1: error: static_assert failed due to requirement '((__builtin_offsetof(struct slab, counters)) & ((unsigned int)(16) - 1)) == 0' "IS_ALIGNED(offsetof(struct slab, counters), 16)"
Date: Sat, 10 Sep 2022 17:33:51 +0900 [thread overview]
Message-ID: <YxxL7zWWuWnCtXW4@hyeyoo> (raw)
In-Reply-To: <202209101614.lMCcS0Zj-lkp@intel.com>
On Sat, Sep 10, 2022 at 04:05:44PM +0800, kernel test robot wrote:
> tree: git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git for-6.1/fit_rcu_head
> head: 2af0ec317dc8f99f0620af23ff6c288bb6f49be5
> commit: 2af0ec317dc8f99f0620af23ff6c288bb6f49be5 [2/2] mm/sl[au]b: rearrange struct slab fields to allow larger rcu_head
> config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220910/202209101614.lMCcS0Zj-lkp@intel.com/config)
> compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
> 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/vbabka/slab.git/commit/?id=2af0ec317dc8f99f0620af23ff6c288bb6f49be5
> git remote add vbabka-slab git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git
> git fetch --no-tags vbabka-slab for-6.1/fit_rcu_head
> git checkout 2af0ec317dc8f99f0620af23ff6c288bb6f49be5
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
> In file included from mm/mempool.c:21:
> >> mm/slab.h:94:1: error: static_assert failed due to requirement '((__builtin_offsetof(struct slab, counters)) & ((unsigned int)(16) - 1)) == 0' "IS_ALIGNED(offsetof(struct slab, counters), 16)"
> static_assert(IS_ALIGNED(offsetof(struct slab, counters), 16));
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:77:34: note: expanded from macro 'static_assert'
> #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:78:41: note: expanded from macro '__static_assert'
> #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
> ^ ~~~~
> 1 error generated.
>
>
> vim +94 mm/slab.h
>
> 90
> 91 #undef SLAB_MATCH
> 92 static_assert(sizeof(struct slab) <= sizeof(struct page));
> 93 #if defined(CONFIG_HAVE_CMPXCHG_DOUBLE) && defined(CONFIG_SLUB)
> > 94 static_assert(IS_ALIGNED(offsetof(struct slab, counters), 16));
> 95 #endif
> 96
Ah, it should be sizeof(void *) * 2, instead of 16.
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
>
--
Thanks,
Hyeonggon
next prev parent reply other threads:[~2022-09-10 8:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-10 8:05 kernel test robot
2022-09-10 8:33 ` Hyeonggon Yoo [this message]
2022-09-10 11:56 ` Vlastimil Babka
2022-09-10 12:16 ` Hyeonggon Yoo
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