Re: [PATCH] block: Remove extra discard_alignment from hd_struct.

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 20 Apr 2011 16:17:35 +0800
Tao Ma <tm@tao.ma> wrote:

> --- a/fs/partitions/check.c
> +++ b/fs/partitions/check.c
> @@ -255,7 +255,12 @@ ssize_t part_discard_alignment_show(struct device *dev,
>  				   struct device_attribute *attr, char *buf)
>  {
>  	struct hd_struct *p = dev_to_part(dev);
> -	return sprintf(buf, "%u\n", p->discard_alignment);
> +	struct gendisk *disk = dev_to_disk(dev);
> +
> +	return sprintf(buf, "%u\n",
> +		       (unsigned long long)queue_limit_discard_alignment(
> +							&disk->queue->limits,
> +							p->start_sect));

fs/partitions/check.c: In function 'part_discard_alignment_show':
fs/partitions/check.c:263: warning: format '%u' expects type 'unsigned int', but argument 3 has type 'long long unsigned int'

um, that should have been apparent from cursory review, let alone
compile testing.  And it will fail runtime testing on little-endian
machines if the third arg is passed on the stack.