[ammarfaizi2-block:paulmck/linux-rcu/dave.2022.06.02a 56/78] kernel/rcu/tasks.h:1239:9: error: aggregate value used where an integer was expected
From: kernel test robot
Date: Thu Jun 02 2022 - 18:06:36 EST
tree: https://github.com/ammarfaizi2/linux-block paulmck/linux-rcu/dave.2022.06.02a
head: 2efc5c4abe4cc1259378f7c1678a93540559673c
commit: cda3200416cdef7f25546cd6249fb411c8c32079 [56/78] rcu-tasks: Merge state into .b.need_qs and atomically update
config: nios2-randconfig-r005-20220602 (https://download.01.org/0day-ci/archive/20220603/202206030549.YOUkgBlA-lkp@xxxxxxxxx/config)
compiler: nios2-linux-gcc (GCC) 11.3.0
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://github.com/ammarfaizi2/linux-block/commit/cda3200416cdef7f25546cd6249fb411c8c32079
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block paulmck/linux-rcu/dave.2022.06.02a
git checkout cda3200416cdef7f25546cd6249fb411c8c32079
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=nios2 SHELL=/bin/bash kernel/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from kernel/rcu/update.c:606:
kernel/rcu/tasks.h: In function 'rcu_trc_cmpxchg_need_qs':
>> kernel/rcu/tasks.h:1239:9: error: aggregate value used where an integer was expected
1239 | ret = cmpxchg(&t->trc_reader_special, trs_old, trs_new);
| ^~~
>> kernel/rcu/tasks.h:1239:9: error: aggregate value used where an integer was expected
In file included from ./arch/nios2/include/generated/asm/cmpxchg.h:1,
from include/asm-generic/atomic.h:12,
from ./arch/nios2/include/generated/asm/atomic.h:1,
from include/linux/atomic.h:7,
from include/asm-generic/bitops/lock.h:5,
from include/asm-generic/bitops.h:31,
from ./arch/nios2/include/generated/asm/bitops.h:1,
from include/linux/bitops.h:33,
from include/linux/kernel.h:22,
from kernel/rcu/update.c:21:
include/asm-generic/cmpxchg.h:92:10: error: cast to union type from type not present in union
92 | ((__typeof__(*(ptr)))__generic_cmpxchg_local((ptr), (unsigned long)(o), \
| ^
include/asm-generic/cmpxchg.h:105:33: note: in expansion of macro 'generic_cmpxchg_local'
105 | #define arch_cmpxchg_local generic_cmpxchg_local
| ^~~~~~~~~~~~~~~~~~~~~
include/asm-generic/cmpxchg.h:112:33: note: in expansion of macro 'arch_cmpxchg_local'
112 | #define arch_cmpxchg arch_cmpxchg_local
| ^~~~~~~~~~~~~~~~~~
include/linux/atomic/atomic-instrumented.h:1916:9: note: in expansion of macro 'arch_cmpxchg'
1916 | arch_cmpxchg(__ai_ptr, __VA_ARGS__); \
| ^~~~~~~~~~~~
kernel/rcu/tasks.h:1239:15: note: in expansion of macro 'cmpxchg'
1239 | ret = cmpxchg(&t->trc_reader_special, trs_old, trs_new);
| ^~~~~~~
vim +1239 kernel/rcu/tasks.h
1224
1225 /*
1226 * Do a cmpxchg() on ->trc_reader_special.b.need_qs, allowing for
1227 * the four-byte operand-size restriction of some platforms.
1228 * Returns the old value, which is often ignored.
1229 */
1230 u8 rcu_trc_cmpxchg_need_qs(struct task_struct *t, u8 old, u8 new)
1231 {
1232 union rcu_special ret;
1233 union rcu_special trs_old = READ_ONCE(t->trc_reader_special);
1234 union rcu_special trs_new = trs_old;
1235
1236 if (trs_old.b.need_qs != old)
1237 return trs_old.b.need_qs;
1238 trs_new.b.need_qs = new;
> 1239 ret = cmpxchg(&t->trc_reader_special, trs_old, trs_new);
1240 return ret.b.need_qs;
1241 }
1242 EXPORT_SYMBOL_GPL(rcu_trc_cmpxchg_need_qs);
1243
--
0-DAY CI Kernel Test Service
https://01.org/lkp