netdev - Re: [PATCH net-next-2.6] net: use _

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Date:	Wed, 02 Jun 2010 19:26:57 -0700
From:	Joe Perches <joe@...ches.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next-2.6] net: use __packed annotation (fwd)

Some comments:

[]

> diff --git a/include/linux/ncp_fs_sb.h b/include/linux/ncp_fs_sb.h
> index 5ec9ca6..8da05bc 100644
> --- a/include/linux/ncp_fs_sb.h
> +++ b/include/linux/ncp_fs_sb.h
> @@ -104,13 +104,13 @@ struct ncp_server {
>  
>  		unsigned int state;		/* STREAM only: receiver state */
>  		struct {
> -			__u32 magic __attribute__((packed));
> -			__u32 len __attribute__((packed));
> -			__u16 type __attribute__((packed));
> -			__u16 p1 __attribute__((packed));
> -			__u16 p2 __attribute__((packed));
> -			__u16 p3 __attribute__((packed));
> -			__u16 type2 __attribute__((packed));
> +			__u32 magic __packed;
> +			__u32 len __packed;
> +			__u16 type __packed;
> +			__u16 p1 __packed;
> +			__u16 p2 __packed;
> +			__u16 p3 __packed;
> +			__u16 type2 __packed;
>  		} buf;				/* STREAM only: temporary buffer */

This could probably just be
		struct {
			__u32 magic;
			__u32 len;
			__u16 type;
			__u16 p1;
			__u16 p2;
			__u16 p3;
			__u16 type2;
 		} __packed buf;				/* STREAM only: temporary buffer */
[]

> diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
> index f28ad2c..499c045 100644
> --- a/net/iucv/iucv.c
> +++ b/net/iucv/iucv.c
> @@ -1463,7 +1463,7 @@ struct iucv_path_pending {
>  	u32 res3;
>  	u8  ippollfg;
>  	u8  res4[3];
> -} __attribute__ ((packed));
> +} __packed;

iucv also has some structs that are __attribute__ ((packed,aligned(8)));

Perhaps those should become: __packed __aligned(8) instead of
leaving them as is.



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