On Thu, Jan 10 2008 at 14:33 +0200, Oliver Neukum <oliver@xxxxxxxxxx> wrote:
> Hi,
>
> could you explain to me why this code can get away with allocating the
> sense buffer on the stack?
>
> static int sg_io(struct file *file, struct request_queue *q,
> struct gendisk *bd_disk, struct sg_io_hdr *hdr)
> {
> unsigned long start_time;
> int writing = 0, ret = 0, has_write_perm = 0;
> struct request *rq;
> char sense[SCSI_SENSE_BUFFERSIZE];
>
> Regards
> Oliver
> -
where? what? do you mean in scsi_ioctl.c?
why not it's a synchronous call?
Do you mean 96 bytes is too big?
Do you mean DMA alignment and cache coherency? I'm working
on that for scsi devices.
Boaz
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