linux-kernel - Re: [PATCH] fixed a macro coding style issue

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Message-ID: <CAEAuANPvc8bi2ezrrZPgCpm0zo_7vkHsX8W32Jv0uf-SiPsGTg@mail.gmail.com>
Date:	Wed, 25 Jul 2012 14:09:36 +0800
From:	Baodong Chen <chenbdchenbd@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fixed a macro coding style issue

this patch definitely changes semantics.
so please discard it, sorry about that!

On Wed, Jul 25, 2012 at 1:37 PM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> On Wed, Jul 25, 2012 at 01:20:56PM +0800, Baodong Chen wrote:
>> Fixed a coding style issue in driver/input/input.c
>>
>> Signed-off-by: Baodong Chen <chenbdchenbd@...il.com>
>> ---
>>  drivers/input/input.c |    6 ++++--
>>  1 files changed, 4 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/input/input.c b/drivers/input/input.c
>> index 8921c61..c96e983 100644
>> --- a/drivers/input/input.c
>> +++ b/drivers/input/input.c
>> @@ -845,11 +845,13 @@ int input_set_keycode(struct input_dev *dev,
>>  EXPORT_SYMBOL(input_set_keycode);
>>
>>  #define MATCH_BIT(bit, max) \
>> +     do { \
>>               for (i = 0; i < BITS_TO_LONGS(max); i++) \
>>                       if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
>>                               break; \
>> -             if (i != BITS_TO_LONGS(max)) \
>> -                     continue;
>> +                     if (i != BITS_TO_LONGS(max)) \
>> +                             continue; \
>> +     } while (0)
>
> This changes semantics. While current implementation of MATCH_BIT might
> not be great style, it is not supposed to be used outside of
> input_match_device(), and the replacement is completely broken.
>
> Thanks.
>
> --
> Dmitry
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