Re: [PATCH 2/2] sched/debug: intruduce task_state_to_char helper function

From: kbuild test robot
Date: Tue Aug 08 2017 - 13:28:34 EST


Hi Xie,

[auto build test ERROR on tip/sched/core]
[also build test ERROR on v4.13-rc4 next-20170808]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Xie-XiuQi/sched-debug-show-task-state-on-proc-sched_debug/20170808-135825
config: x86_64-randconfig-ws0-08082012 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All error/warnings (new ones prefixed by >>):

In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from include/linux/proc_fs.h:7,
from kernel/sched/debug.c:13:
kernel/sched/debug.c: In function 'print_task':
>> include/linux/compiler.h:159:17: error: implicit declaration of function 'task_sate_to_char' [-Werror=implicit-function-declaration]
static struct ftrace_branch_data \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^
>> kernel/sched/debug.c:32:2: note: in expansion of macro 'if'
if (m) \
^
>> kernel/sched/debug.c:432:3: note: in expansion of macro 'SEQ_printf'
SEQ_printf(m, " %c", task_sate_to_char(p));
^
cc1: some warnings being treated as errors
--
In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from include/linux/proc_fs.h:7,
from kernel//sched/debug.c:13:
kernel//sched/debug.c: In function 'print_task':
>> include/linux/compiler.h:159:17: error: implicit declaration of function 'task_sate_to_char' [-Werror=implicit-function-declaration]
static struct ftrace_branch_data \
^
include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
^
kernel//sched/debug.c:32:2: note: in expansion of macro 'if'
if (m) \
^
kernel//sched/debug.c:432:3: note: in expansion of macro 'SEQ_printf'
SEQ_printf(m, " %c", task_sate_to_char(p));
^
cc1: some warnings being treated as errors

vim +/task_sate_to_char +159 include/linux/compiler.h

2bcd521a Steven Rostedt 2008-11-21 148
2bcd521a Steven Rostedt 2008-11-21 149 #ifdef CONFIG_PROFILE_ALL_BRANCHES
2bcd521a Steven Rostedt 2008-11-21 150 /*
2bcd521a Steven Rostedt 2008-11-21 151 * "Define 'is'", Bill Clinton
2bcd521a Steven Rostedt 2008-11-21 152 * "Define 'if'", Steven Rostedt
2bcd521a Steven Rostedt 2008-11-21 153 */
ab3c9c68 Linus Torvalds 2009-04-07 154 #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
ab3c9c68 Linus Torvalds 2009-04-07 155 #define __trace_if(cond) \
b33c8ff4 Arnd Bergmann 2016-02-12 156 if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
2bcd521a Steven Rostedt 2008-11-21 157 ({ \
2bcd521a Steven Rostedt 2008-11-21 158 int ______r; \
2bcd521a Steven Rostedt 2008-11-21 @159 static struct ftrace_branch_data \
2bcd521a Steven Rostedt 2008-11-21 160 __attribute__((__aligned__(4))) \
2bcd521a Steven Rostedt 2008-11-21 161 __attribute__((section("_ftrace_branch"))) \
2bcd521a Steven Rostedt 2008-11-21 162 ______f = { \
2bcd521a Steven Rostedt 2008-11-21 163 .func = __func__, \
2bcd521a Steven Rostedt 2008-11-21 164 .file = __FILE__, \
2bcd521a Steven Rostedt 2008-11-21 165 .line = __LINE__, \
2bcd521a Steven Rostedt 2008-11-21 166 }; \
2bcd521a Steven Rostedt 2008-11-21 167 ______r = !!(cond); \
97e7e4f3 Witold Baryluk 2009-03-17 168 ______f.miss_hit[______r]++; \
2bcd521a Steven Rostedt 2008-11-21 169 ______r; \
2bcd521a Steven Rostedt 2008-11-21 170 }))
2bcd521a Steven Rostedt 2008-11-21 171 #endif /* CONFIG_PROFILE_ALL_BRANCHES */
2bcd521a Steven Rostedt 2008-11-21 172

:::::: The code at line 159 was first introduced by commit
:::::: 2bcd521a684cc94befbe2ce7d5b613c841b0d304 trace: profile all if conditionals

:::::: TO: Steven Rostedt <srostedt@xxxxxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxx>

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