1:49 a.m.
On Mon, Jun 07, 2021 at 05:27:27PM +0200, Vlastimil Babka wrote:
On 6/7/21 2:25 PM, Hyeonggon Yoo wrote:
> On Mon, Jun 07, 2021 at 01:40:02PM +0200, Vlastimil Babka wrote:
>> On 6/6/21 1:08 PM, Hyeonggon Yoo wrote:
>> > On Sat, Jun 05, 2021 at 02:10:46PM +0800, kernel test robot wrote:
>> >> tree:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
>> >> head: ccc252d2e818f6a479441119ad453c3ce7c7c461
>> >> commit: a7ba988ff9de37f0961b4bf96d17aca73d0d2e25 [7012/7430] mm, slub:
change run-time assertion in kmalloc_index() to compile-time
>> >> config: parisc-randconfig-r014-20210604 (attached as .config)
>> >> compiler: hppa-linux-gcc (GCC) 9.3.0
>> >> 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/next/linux-next.git/commi...
>> >> git remote add linux-next
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>> >> git fetch --no-tags linux-next master
>> >> git checkout a7ba988ff9de37f0961b4bf96d17aca73d0d2e25
>> >> # save the attached .config to linux build tree
>> >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross
ARCH=parisc
>> >>
>> >> If you fix the issue, kindly add following tag as appropriate
>> >> Reported-by: kernel test robot <lkp(a)intel.com>
>> >>
>> >> All errors (new ones prefixed by >>):
>> >> In file included from <command-line>:
>> >> In function 'kmalloc_index',
>> >> inlined from 'kmalloc_node' at
include/linux/slab.h:572:20,
>> >> inlined from 'bpf_map_kmalloc_node.isra.0.part.0' at
include/linux/bpf.h:1319:9:
>> >> >> include/linux/compiler_types.h:328:38: error: call to
'__compiletime_assert_183' declared with attribute error: unexpected size in
kmalloc_index()
>> >> 328 | _compiletime_assert(condition, msg, __compiletime_assert_,
__COUNTER__)
>> >> | ^
>> >> include/linux/compiler_types.h:309:4: note: in definition of macro
'__compiletime_assert'
>> >> 309 | prefix ## suffix(); \
>> >> | ^~~~~~
>> >> include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
>> >> 328 | _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/slab.h:389:2: note: in expansion of macro
'BUILD_BUG_ON_MSG'
>> >> 389 | BUILD_BUG_ON_MSG(1, "unexpected size in
kmalloc_index()");
>> >> | ^~~~~~~~~~~~~~~~
>> >
>> > Reproduce with attached config, and read the code.
>> > It has no problem in clang (clang-10/clang-11). it is problem with gcc.
>>
>> But what exactly is the gcc problem here?
>> Did you have to reproduce it with specific gcc version and/or architecture?
>>
>
> Before replying, I should say that I'm not an expert on gcc.
> I just tried some ways to fix the error, and it seemed to me that
> gcc is doing something wrong.
I'm involving my gcc colleagues, will report results...
Thank you so much!
Hyeonggon