* [peterz-queue:sched/core 1/5] include/linux/compiler.h:55:45: error: invalid use of void expression
@ 2025-02-13 14:57 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-02-13 14:57 UTC (permalink / raw)
To: zihan zhou; +Cc: oe-kbuild-all, Peter Zijlstra, Vincent Guittot
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core
head: f5e5644f37620a7177ec30bf771fe90926ed9e7a
commit: a776cf5efa44410204ec367cd593ad56b9d3df5e [1/5] sched: Cancel the slice protection of the idle entity
config: csky-randconfig-001-20250213 (https://download.01.org/0day-ci/archive/20250213/202502132216.LCb0y45e-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250213/202502132216.LCb0y45e-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/202502132216.LCb0y45e-lkp@intel.com/
All errors (new ones prefixed by >>):
kernel/sched/fair.c: In function 'protect_slice':
kernel/sched/fair.c:897:18: warning: statement with no effect [-Wunused-value]
897 | se->vlag == se->deadline;
| ~~~~~~~~~^~~~~~~~~~~~~~~
In file included from include/linux/cleanup.h:5,
from include/linux/cpumask.h:10,
from include/linux/energy_model.h:4,
from kernel/sched/fair.c:23:
kernel/sched/fair.c: In function 'cancel_protect_slice':
>> include/linux/compiler.h:55:45: error: invalid use of void expression
55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^
include/linux/compiler.h:57:52: note: in definition of macro '__trace_if_var'
57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
| ^~~~
kernel/sched/fair.c:902:9: note: in expansion of macro 'if'
902 | if (protect_slice(se))
| ^~
>> include/linux/compiler.h:55:45: error: invalid use of void expression
55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^
include/linux/compiler.h:57:61: note: in definition of macro '__trace_if_var'
57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
| ^~~~
kernel/sched/fair.c:902:9: note: in expansion of macro 'if'
902 | if (protect_slice(se))
| ^~
>> include/linux/compiler.h:55:45: error: invalid use of void expression
55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^
include/linux/compiler.h:68:10: note: in definition of macro '__trace_if_value'
68 | (cond) ? \
| ^~~~
include/linux/compiler.h:55:28: note: in expansion of macro '__trace_if_var'
55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^~~~~~~~~~~~~~
kernel/sched/fair.c:902:9: note: in expansion of macro 'if'
902 | if (protect_slice(se))
| ^~
kernel/sched/fair.c: In function 'pick_eevdf':
kernel/sched/fair.c:942:50: error: void value not ignored as it ought to be
942 | if (sched_feat(RUN_TO_PARITY) && curr && protect_slice(curr))
| ^~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:57:52: note: in definition of macro '__trace_if_var'
57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
| ^~~~
kernel/sched/fair.c:942:9: note: in expansion of macro 'if'
942 | if (sched_feat(RUN_TO_PARITY) && curr && protect_slice(curr))
| ^~
kernel/sched/fair.c:942:50: error: void value not ignored as it ought to be
942 | if (sched_feat(RUN_TO_PARITY) && curr && protect_slice(curr))
| ^~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:57:61: note: in definition of macro '__trace_if_var'
57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
| ^~~~
kernel/sched/fair.c:942:9: note: in expansion of macro 'if'
942 | if (sched_feat(RUN_TO_PARITY) && curr && protect_slice(curr))
| ^~
kernel/sched/fair.c:942:50: error: void value not ignored as it ought to be
942 | if (sched_feat(RUN_TO_PARITY) && curr && protect_slice(curr))
| ^~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:68:10: note: in definition of macro '__trace_if_value'
68 | (cond) ? \
| ^~~~
include/linux/compiler.h:55:28: note: in expansion of macro '__trace_if_var'
55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
| ^~~~~~~~~~~~~~
kernel/sched/fair.c:942:9: note: in expansion of macro 'if'
942 | if (sched_feat(RUN_TO_PARITY) && curr && protect_slice(curr))
| ^~
vim +55 include/linux/compiler.h
2bcd521a684cc9 Steven Rostedt 2008-11-21 49
2bcd521a684cc9 Steven Rostedt 2008-11-21 50 #ifdef CONFIG_PROFILE_ALL_BRANCHES
2bcd521a684cc9 Steven Rostedt 2008-11-21 51 /*
2bcd521a684cc9 Steven Rostedt 2008-11-21 52 * "Define 'is'", Bill Clinton
2bcd521a684cc9 Steven Rostedt 2008-11-21 53 * "Define 'if'", Steven Rostedt
2bcd521a684cc9 Steven Rostedt 2008-11-21 54 */
a15fd609ad53a6 Linus Torvalds 2019-03-20 @55 #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
a15fd609ad53a6 Linus Torvalds 2019-03-20 56
:::::: The code at line 55 was first introduced by commit
:::::: a15fd609ad53a631a927c6680e8fb606f42a712b tracing: Simplify "if" macro code
:::::: TO: Linus Torvalds <torvalds@linux-foundation.org>
:::::: CC: Steven Rostedt (VMware) <rostedt@goodmis.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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