linux-kernel - Re: [PATCH] block: Remove extra discard_alignment from hd

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Message-Id: <20110511170818.6506bb9d.akpm@linux-foundation.org>
Date:	Wed, 11 May 2011 17:08:18 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Tao Ma <tm@....ma>
Cc:	linux-kernel@...r.kernel.org, axboe@...nel.dk
Subject: Re: [PATCH] block: Remove extra discard_alignment from hd_struct.

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

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