From: kernel test robot <lkp@intel.com>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
Madhavan Srinivasan <maddy@linux.ibm.com>
Subject: include/math-emu/double.h:59:21: warning: '__BIG_ENDIAN' is not defined, evaluates to 0
Date: Thu, 01 Jan 2026 10:34:13 +0800 [thread overview]
Message-ID: <202601011003.bwpVuFs1-lkp@intel.com> (raw)
Hi Paul,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b69053dd3ffbc0d2dedbbc86182cdef6f641fe1b
commit: aca95fb6bb572a77f39d42d83ab72a965026577d powerpc/microwatt: Add SMP support
date: 10 months ago
config: powerpc64-randconfig-r113-20251231 (https://download.01.org/0day-ci/archive/20260101/202601011003.bwpVuFs1-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project f43d6834093b19baf79beda8c0337ab020ac5f17)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260101/202601011003.bwpVuFs1-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601011003.bwpVuFs1-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from <built-in>:3:
In file included from include/linux/compiler_types.h:171:
include/linux/compiler-clang.h:28:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined]
28 | #define __SANITIZE_ADDRESS__
| ^
<built-in>:354:9: note: previous definition is here
354 | #define __SANITIZE_ADDRESS__ 1
| ^
In file included from arch/powerpc/math-emu/math.c:14:
>> include/math-emu/double.h:59:21: warning: '__BIG_ENDIAN' is not defined, evaluates to 0 [-Wundef]
59 | #if __BYTE_ORDER == __BIG_ENDIAN
| ^
2 warnings generated.
--
In file included from <built-in>:3:
In file included from include/linux/compiler_types.h:171:
include/linux/compiler-clang.h:28:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined]
28 | #define __SANITIZE_ADDRESS__
| ^
<built-in>:354:9: note: previous definition is here
354 | #define __SANITIZE_ADDRESS__ 1
| ^
In file included from arch/powerpc/math-emu/fsqrts.c:8:
>> include/math-emu/double.h:59:21: warning: '__BIG_ENDIAN' is not defined, evaluates to 0 [-Wundef]
59 | #if __BYTE_ORDER == __BIG_ENDIAN
| ^
In file included from arch/powerpc/math-emu/fsqrts.c:9:
>> include/math-emu/single.h:50:21: warning: '__BIG_ENDIAN' is not defined, evaluates to 0 [-Wundef]
50 | #if __BYTE_ORDER == __BIG_ENDIAN
| ^
3 warnings generated.
vim +/__BIG_ENDIAN +59 include/math-emu/double.h
^1da177e4c3f415 Linus Torvalds 2005-04-16 54
^1da177e4c3f415 Linus Torvalds 2005-04-16 55 union _FP_UNION_D
^1da177e4c3f415 Linus Torvalds 2005-04-16 56 {
^1da177e4c3f415 Linus Torvalds 2005-04-16 57 double flt;
^1da177e4c3f415 Linus Torvalds 2005-04-16 58 struct {
^1da177e4c3f415 Linus Torvalds 2005-04-16 @59 #if __BYTE_ORDER == __BIG_ENDIAN
^1da177e4c3f415 Linus Torvalds 2005-04-16 60 unsigned sign : 1;
^1da177e4c3f415 Linus Torvalds 2005-04-16 61 unsigned exp : _FP_EXPBITS_D;
^1da177e4c3f415 Linus Torvalds 2005-04-16 62 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16 63 unsigned frac0 : _FP_W_TYPE_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16 64 #else
^1da177e4c3f415 Linus Torvalds 2005-04-16 65 unsigned frac0 : _FP_W_TYPE_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16 66 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16 67 unsigned exp : _FP_EXPBITS_D;
^1da177e4c3f415 Linus Torvalds 2005-04-16 68 unsigned sign : 1;
^1da177e4c3f415 Linus Torvalds 2005-04-16 69 #endif
^1da177e4c3f415 Linus Torvalds 2005-04-16 70 } bits __attribute__((packed));
^1da177e4c3f415 Linus Torvalds 2005-04-16 71 };
^1da177e4c3f415 Linus Torvalds 2005-04-16 72
:::::: The code at line 59 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-01-01 2:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-01 2:34 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2025-07-30 8:59 include/math-emu/double.h:59:21: warning: '__BIG_ENDIAN' is not defined, evaluates to 0 kernel test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202601011003.bwpVuFs1-lkp@intel.com \
--to=lkp@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=maddy@linux.ibm.com \
--cc=oe-kbuild-all@lists.linux.dev \
--cc=paulus@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.