linux-kernel - Re: [PATCH] i2c documentation: rename variable "register" to "reg"

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Date:	Wed, 27 Aug 2014 10:24:10 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	José Manuel Alarcón Roldán 
	<jose.alarcon.roldan@...il.com>, wsa@...-dreams.de
CC:	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c documentation: rename variable "register" to "reg"

On 08/26/14 01:40, José Manuel Alarcón Roldán wrote:
> The example code provided with the i2c device interface documentation
> won't compile since it uses the reserved word "register" to name a
> variable.
> 
> The compiler fails with this error message:
> 
>  error: expected identifier or '(' before '=' token
>    __u8 register = 0x20; /* Device register to access */
>                  ^
> 
> Rename the variable "register" to simply "reg"
> in the example code.
> 
> Signed-off-by: Jose Alarcon Roldan <jose.alarcon.roldan@...il.com>
> ---
>  Documentation/i2c/dev-interface | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface
> index 3e742ba..f8b1e50 100644
> --- a/Documentation/i2c/dev-interface
> +++ b/Documentation/i2c/dev-interface
> @@ -57,12 +57,12 @@ Well, you are all set up now. You can now use
> SMBus commands or plain
>  I2C to communicate with your device. SMBus commands are preferred if
>  the device supports them. Both are illustrated below.
> 
> -  __u8 register = 0x10; /* Device register to access */
> +  __u8 reg = 0x10; /* Device register to access */
>    __s32 res;
>    char buf[10];
> 
>    /* Using SMBus commands */
> -  res = i2c_smbus_read_word_data(file, register);
> +  res = i2c_smbus_read_word_data(file, reg);
>    if (res < 0) {
>      /* ERROR HANDLING: i2c transaction failed */
>    } else {
> @@ -70,8 +70,8 @@ the device supports them. Both are illustrated below.
>    }
> 
>    /* Using I2C Write, equivalent of
> -     i2c_smbus_write_word_data(file, register, 0x6543) */
> -  buf[0] = register;
> +     i2c_smbus_write_word_data(file, reg, 0x6543) */
> +  buf[0] = reg;
>    buf[1] = 0x43;
>    buf[2] = 0x65;
>    if (write(file, buf, 3) ! =3) {

Since you are fixing build problems:  Does that last line compile OK for you?
It does not for me.

-- 
~Randy
--
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