linux-kernel - Re: [Outreachy kernel] [PATCH 1/4] iio: common: st_sensors: Replace ternary operator with min macro

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Message-ID: <CALrZqyPKGjtL-QrRi0YryaTw4q8v+10NkSwqpNd9coPstFnC6w@mail.gmail.com>
Date:   Wed, 29 Mar 2017 22:54:19 +0530
From:   SIMRAN SINGHAL <singhalsimran0@...il.com>
To:     Daniel Baluta <daniel.baluta@...il.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald <pmeerw@...erw.net>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        outreachy-kernel <outreachy-kernel@...glegroups.com>
Subject: Re: [Outreachy kernel] [PATCH 1/4] iio: common: st_sensors: Replace
 ternary operator with min macro

On Wed, Mar 29, 2017 at 9:46 PM, Daniel Baluta <daniel.baluta@...il.com> wrote:
> On Wed, Mar 29, 2017 at 3:33 PM, simran singhal
> <singhalsimran0@...il.com> wrote:
>> Use macro min() to get the minimum of two values for brevity and
>> readability.
>>
>> Signed-off-by: simran singhal <singhalsimran0@...il.com>
>> ---
>>  drivers/iio/common/st_sensors/st_sensors_i2c.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c
>> index c83df4d..7a68fdd 100644
>> --- a/drivers/iio/common/st_sensors/st_sensors_i2c.c
>> +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c
>> @@ -39,7 +39,7 @@ static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb,
>>         *res_byte = err & 0xff;
>>
>>  st_accel_i2c_read_byte_error:
>> -       return err < 0 ? err : 0;
>> +       return min(err, 0);
>>  }
>
> Appreciate the brevity but this certainly doesn't make code
> easier to read.
>
> In linux kernel err < 0 signifies an error and be replacing
> comparison < 0 with min() we some hide the meaning of this.
>
Yes, you are right keeping the previous one will be more
meaningful.

Thanks.

> thanks,
> Daniel.