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SubjectRe: [PATCH] printk: Make linux/printk.h self-contained
Hi Herbert,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on pmladek/for-next linux/master v5.7 next-20200611]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Herbert-Xu/printk-Make-linux-printk-h-self-contained/20200611-205340
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b29482fde649c72441d5478a4ea2c52c56d97a5e
config: s390-allyesconfig (attached as .config)
compiler: s390-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
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390

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

All warnings (new ones prefixed by >>, old ones prefixed by <<):

In file included from drivers/block/drbd/drbd_interval.c:2:
>> arch/s390/include/asm/bug.h:43: warning: "BUG" redefined
43 | #define BUG() do { |
In file included from include/linux/bug.h:32,
from include/linux/mmdebug.h:5,
from arch/s390/include/asm/cmpxchg.h:11,
from arch/s390/include/asm/atomic.h:16,
from include/linux/atomic.h:7,
from include/linux/debug_locks.h:6,
from include/linux/lockdep.h:44,
from include/linux/spinlock_types.h:18,
from include/linux/ratelimit_types.h:7,
from include/linux/printk.h:10,
from include/linux/kernel.h:15,
from arch/s390/include/asm/bug.h:5,
from drivers/block/drbd/drbd_interval.c:2:
include/asm-generic/bug.h:54: note: this is the location of the previous definition
54 | #define BUG() do { |
In file included from drivers/block/drbd/drbd_interval.c:2:
>> arch/s390/include/asm/bug.h:52: warning: "WARN_ON" redefined
52 | #define WARN_ON(x) ({ |
In file included from include/linux/bug.h:32,
from include/linux/mmdebug.h:5,
from arch/s390/include/asm/cmpxchg.h:11,
from arch/s390/include/asm/atomic.h:16,
from include/linux/atomic.h:7,
from include/linux/debug_locks.h:6,
from include/linux/lockdep.h:44,
from include/linux/spinlock_types.h:18,
from include/linux/ratelimit_types.h:7,
from include/linux/printk.h:10,
from include/linux/kernel.h:15,
from arch/s390/include/asm/bug.h:5,
from drivers/block/drbd/drbd_interval.c:2:
include/asm-generic/bug.h:112: note: this is the location of the previous definition
112 | #define WARN_ON(condition) ({ |

vim +/BUG +43 arch/s390/include/asm/bug.h

c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 42
2d6cd2a5908ade arch/s390/include/asm/bug.h Martin Schwidefsky 2008-12-25 @43 #define BUG() do { \
2d6cd2a5908ade arch/s390/include/asm/bug.h Martin Schwidefsky 2008-12-25 44 __EMIT_BUG(0); \
5506e68975c346 arch/s390/include/asm/bug.h David Daney 2009-12-04 45 unreachable(); \
2d6cd2a5908ade arch/s390/include/asm/bug.h Martin Schwidefsky 2008-12-25 46 } while (0)
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 47
19d436268dde95 arch/s390/include/asm/bug.h Peter Zijlstra 2017-02-25 48 #define __WARN_FLAGS(flags) do { \
19d436268dde95 arch/s390/include/asm/bug.h Peter Zijlstra 2017-02-25 49 __EMIT_BUG(BUGFLAG_WARNING|(flags)); \
a9df8e325d0de5 arch/s390/include/asm/bug.h Heiko Carstens 2010-01-13 50 } while (0)
a9df8e325d0de5 arch/s390/include/asm/bug.h Heiko Carstens 2010-01-13 51
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 @52 #define WARN_ON(x) ({ \
fd0cbdd378258f include/asm-s390/bug.h Heiko Carstens 2007-08-02 53 int __ret_warn_on = !!(x); \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 54 if (__builtin_constant_p(__ret_warn_on)) { \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 55 if (__ret_warn_on) \
b2be05273a1744 arch/s390/include/asm/bug.h Ben Hutchings 2010-04-03 56 __WARN(); \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 57 } else { \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 58 if (unlikely(__ret_warn_on)) \
b2be05273a1744 arch/s390/include/asm/bug.h Ben Hutchings 2010-04-03 59 __WARN(); \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 60 } \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 61 unlikely(__ret_warn_on); \
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 62 })
c0007f1a65762e include/asm-s390/bug.h Heiko Carstens 2007-04-27 63

:::::: The code at line 43 was first introduced by commit
:::::: 2d6cd2a5908adecd06c8cee2a73814463ed71493 [S390] remove warnings with functions ending in BUG

:::::: TO: Martin Schwidefsky <schwidefsky@de.ibm.com>
:::::: CC: Martin Schwidefsky <schwidefsky@de.ibm.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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