* [jfern:rcu/rcutop-debugobj 1/4] include/linux/mman.h:153:9: warning: division by zero is undefined
@ 2023-04-22 7:33 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-04-22 7:33 UTC (permalink / raw)
To: Joel Fernandes (Google); +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git rcu/rcutop-debugobj
head: bb4ed72d010d114a825cba50a2f910b8a6bdadf7
commit: 96ffcf4468d55cf44750a267aa5e54c4de560a5b [1/4] debugobjects: Add obj_data to a debug_obj
config: powerpc-katmai_defconfig (https://download.01.org/0day-ci/archive/20230422/202304221538.ChgrACiJ-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
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
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/commit/?id=96ffcf4468d55cf44750a267aa5e54c4de560a5b
git remote add jfern https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git
git fetch --no-tags jfern rcu/rcutop-debugobj
git checkout 96ffcf4468d55cf44750a267aa5e54c4de560a5b
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc prepare
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304221538.ChgrACiJ-lkp@intel.com/
All warnings (new ones prefixed by >>):
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:162:1: warning: array index 3 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
_SIG_SET_BINOP(sigandnsets, _sig_andn)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:139:3: note: expanded from macro '_SIG_SET_BINOP'
r->sig[3] = op(a3, b3); \
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:162:1: warning: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
_SIG_SET_BINOP(sigandnsets, _sig_andn)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:140:3: note: expanded from macro '_SIG_SET_BINOP'
r->sig[2] = op(a2, b2); \
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:186:1: warning: array index 3 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
_SIG_SET_OP(signotset, _sig_not)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:173:27: note: expanded from macro '_SIG_SET_OP'
case 4: set->sig[3] = op(set->sig[3]); \
^ ~
include/linux/signal.h:185:24: note: expanded from macro '_sig_not'
#define _sig_not(x) (~(x))
^
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:186:1: warning: array index 3 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
_SIG_SET_OP(signotset, _sig_not)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:173:10: note: expanded from macro '_SIG_SET_OP'
case 4: set->sig[3] = op(set->sig[3]); \
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:186:1: warning: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
_SIG_SET_OP(signotset, _sig_not)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:174:20: note: expanded from macro '_SIG_SET_OP'
set->sig[2] = op(set->sig[2]); \
^ ~
include/linux/signal.h:185:24: note: expanded from macro '_sig_not'
#define _sig_not(x) (~(x))
^
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:186:1: warning: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
_SIG_SET_OP(signotset, _sig_not)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:174:3: note: expanded from macro '_SIG_SET_OP'
set->sig[2] = op(set->sig[2]); \
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:19:
>> include/linux/mman.h:153:9: warning: division by zero is undefined [-Wdivision-by-zero]
_calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:132:21: note: expanded from macro '_calc_vm_trans'
: ((x) & (bit1)) / ((bit1) / (bit2))))
^ ~~~~~~~~~~~~~~~~~
include/linux/mman.h:154:9: warning: division by zero is undefined [-Wdivision-by-zero]
_calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:132:21: note: expanded from macro '_calc_vm_trans'
: ((x) & (bit1)) / ((bit1) / (bit2))))
^ ~~~~~~~~~~~~~~~~~
30 warnings and 1 error generated.
make[2]: *** [scripts/Makefile.build:114: arch/powerpc/kernel/asm-offsets.s] Error 1
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:1287: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:226: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +153 include/linux/mman.h
^1da177e4c3f41 Linus Torvalds 2005-04-16 145
^1da177e4c3f41 Linus Torvalds 2005-04-16 146 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 147 * Combine the mmap "flags" argument into "vm_flags" used internally.
^1da177e4c3f41 Linus Torvalds 2005-04-16 148 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 149 static inline unsigned long
^1da177e4c3f41 Linus Torvalds 2005-04-16 150 calc_vm_flag_bits(unsigned long flags)
^1da177e4c3f41 Linus Torvalds 2005-04-16 151 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 152 return _calc_vm_trans(flags, MAP_GROWSDOWN, VM_GROWSDOWN ) |
b6fb293f2497a9 Jan Kara 2017-11-01 @153 _calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) |
b3fbbea4c00220 Kevin Brodsky 2019-11-25 154 _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
b3fbbea4c00220 Kevin Brodsky 2019-11-25 155 arch_calc_vm_flag_bits(flags);
^1da177e4c3f41 Linus Torvalds 2005-04-16 156 }
00619bcc44d6b7 Jerome Marchand 2013-11-12 157
:::::: The code at line 153 was first introduced by commit
:::::: b6fb293f2497a9841d94f6b57bd2bb2cd222da43 mm: Define MAP_SYNC and VM_SYNC flags
:::::: TO: Jan Kara <jack@suse.cz>
:::::: CC: Dan Williams <dan.j.williams@intel.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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