netdev - Re: [PATCH] vhost: Fix typos in comments and clarity on alignof usage

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Message-ID: <20250617183741.GD2545@horms.kernel.org>
Date: Tue, 17 Jun 2025 19:37:41 +0100
From: Simon Horman <horms@...nel.org>
To: Alok Tiwari <alok.a.tiwari@...cle.com>
Cc: mst@...hat.com, jasowang@...hat.com, eperezma@...hat.com,
	kvm@...r.kernel.org, virtualization@...ts.linux.dev,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] vhost: Fix typos in comments and clarity on alignof usage

On Sun, Jun 15, 2025 at 10:39:11AM -0700, Alok Tiwari wrote:
> This patch fixes multiple typos and improves comment clarity across
> vhost.c.
> - Correct spelling errors: "thead" -> "thread", "RUNNUNG" -> "RUNNING"
>   and "available".
> - Improve comment by replacing informal comment ("Supersize me!")
>   with a clear description.
> - Use __alignof__ correctly on dereferenced pointer types for better
>   readability and alignment with kernel documentation.

Could you expand on the last point?
I see that the patch uses __alignof__ with rather than without parentheses.
But I don't follow how that corresponds with the comment above.

> 
> These changes enhance code readability and maintainability.
> 
> Signed-off-by: Alok Tiwari <alok.a.tiwari@...cle.com>

...

> @@ -1898,8 +1898,8 @@ static long vhost_vring_set_addr(struct vhost_dev *d,
>  		return -EFAULT;
>  
>  	/* Make sure it's safe to cast pointers to vring types. */
> -	BUILD_BUG_ON(__alignof__ *vq->avail > VRING_AVAIL_ALIGN_SIZE);
> -	BUILD_BUG_ON(__alignof__ *vq->used > VRING_USED_ALIGN_SIZE);
> +	BUILD_BUG_ON(__alignof__(*vq->avail) > VRING_AVAIL_ALIGN_SIZE);
> +	BUILD_BUG_ON(__alignof__(*vq->used) > VRING_USED_ALIGN_SIZE);
>  	if ((a.avail_user_addr & (VRING_AVAIL_ALIGN_SIZE - 1)) ||
>  	    (a.used_user_addr & (VRING_USED_ALIGN_SIZE - 1)) ||
>  	    (a.log_guest_addr & (VRING_USED_ALIGN_SIZE - 1)))

...