[U-Boot] [PATCH] bug.h: introduce WARN_ONCE

[Ramon Fried]

On Tue, May 29, 2018 at 2:21 AM, Masahiro Yamada
<yamada.masahiro at socionext.com> wrote:
> 2018-05-28 18:44 GMT+09:00 Ramon Fried <ramon.fried at linaro.org>:
>> Add WARN_ONCE definition to allow single time notification
>> of warnings to the user.
>>
>> Signed-off-by: Ramon Fried <ramon.fried at gmail.com>
>> ---
>>  include/linux/bug.h | 18 ++++++++++++++++++
>>  1 file changed, 18 insertions(+)
>>
>> diff --git a/include/linux/bug.h b/include/linux/bug.h
>> index f07bb716fc0..67b6057a22a 100644
>> --- a/include/linux/bug.h
>> +++ b/include/linux/bug.h
>> @@ -20,6 +20,13 @@
>>         unlikely(__ret_warn_on);                                        \
>>  })
>>
>> +#define WARN(condition, format...) ({                   \
>> +       int __ret_warn_on = !!(condition);              \
>> +       if (unlikely(__ret_warn_on))                    \
>> +               __WARN_printf(format);                  \
>
>
> Where is __WARN_printf() defined?
>
Ohhh. thanks for noticing. I pushed the wrong file.
I'm pushing a fix shortly.

>
>
>
>> +       unlikely(__ret_warn_on);                    \
>> +})
>> +
>>  #define WARN_ON_ONCE(condition)        ({                              \
>>         static bool __warned;                                   \
>>         int __ret_warn_once = !!(condition);                    \
>> @@ -31,4 +38,15 @@
>>         unlikely(__ret_warn_once);                              \
>>  })
>>
>> +#define WARN_ONCE(condition, format...) ({          \
>> +       static bool __warned;     \
>> +       int __ret_warn_once = !!(condition);            \
>> +                                                               \
>> +       if (unlikely(__ret_warn_once && !__warned)) {       \
>> +               __warned = true;                \
>> +               WARN(1, format);                \
>> +       }                           \
>> +       unlikely(__ret_warn_once);              \
>> +})
>> +
>>  #endif /* _LINUX_BUG_H */
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
>> a Linux Foundation Collaborative Project
>>
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>
>
>
> --
> Best Regards
> Masahiro Yamada
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