On Wednesday 02 May 2007, Paul Fulghum wrote:
> + switch (cmd) {
> +
> + case MGSL_IOCSPARAMS32:
> + rc = set_params32(info, (struct MGSL_PARAMS32 __user *)compat_ptr(arg));
> + break;
> +
> + case MGSL_IOCGPARAMS32:
> + rc = get_params32(info, (struct MGSL_PARAMS32 __user *)compat_ptr(arg));
> + break;
No need for the cast here.
> +
> + spin_lock_irqsave(&info->lock, flags);
no need for _irqsave, just use spin_{,un}lock_irq() when you know that
interrupts are enabled.
> --- a/include/linux/synclink.h 2007-04-25 22:08:32.000000000 -0500
> +++ b/include/linux/synclink.h 2007-05-02 14:59:17.000000000 -0500
> @@ -167,6 +167,24 @@ typedef struct _MGSL_PARAMS
>
> } MGSL_PARAMS, *PMGSL_PARAMS;
>
> +/* provide 32 bit ioctl compatibility on 64 bit systems */
> +struct MGSL_PARAMS32
> +{
> + unsigned int mode;
> + unsigned char loopback;
> + unsigned short flags;
> + unsigned char encoding;
> + unsigned int clock_speed;
> + unsigned char addr_filter;
> + unsigned short crc_type;
> + unsigned char preamble_length;
> + unsigned char preamble;
> + unsigned int data_rate;
> + unsigned char data_bits;
> + unsigned char stop_bits;
> + unsigned char parity;
> +};
The definition is correct, but by convention it would be better to use
compat_ulong_t instead of unsigned int for those fields that are an
unsigned long in native mode.
Arnd <><
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