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From: David Laight <David.Laight@ACULAB.COM>
To: "'Kieran Bingham'" <kieran.bingham+renesas@ideasonboard.com>,
	"Laurent Pinchart" <laurent.pinchart@ideasonboard.com>,
	"linux-renesas-soc@vger.kernel.org"
	<linux-renesas-soc@vger.kernel.org>,
	"linux-media@vger.kernel.org" <linux-media@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
	open list <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH 02/11] media: vsp1: use kernel __packed for structures
Date: Tue, 13 Mar 2018 11:20:04 +0000	[thread overview]
Message-ID: <b58ff7ec7f7246498325e74b31ba3664@AcuMS.aculab.com> (raw)
In-Reply-To: <767c4c9f6aa4799a58f0979b318208f1d3e27860.1520632434.git-series.kieran.bingham+renesas@ideasonboard.com>

From: Kieran Bingham
> Sent: 09 March 2018 22:04
> The kernel provides a __packed definition to abstract away from the
> compiler specific attributes tag.
> 
> Convert all packed structures in VSP1 to use it.
> 
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> ---
>  drivers/media/platform/vsp1/vsp1_dl.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/vsp1/vsp1_dl.c b/drivers/media/platform/vsp1/vsp1_dl.c
> index 37e2c984fbf3..382e45c2054e 100644
> --- a/drivers/media/platform/vsp1/vsp1_dl.c
> +++ b/drivers/media/platform/vsp1/vsp1_dl.c
> @@ -29,19 +29,19 @@
>  struct vsp1_dl_header_list {
>  	u32 num_bytes;
>  	u32 addr;
> -} __attribute__((__packed__));
> +} __packed;
> 
>  struct vsp1_dl_header {
>  	u32 num_lists;
>  	struct vsp1_dl_header_list lists[8];
>  	u32 next_header;
>  	u32 flags;
> -} __attribute__((__packed__));
> +} __packed;
> 
>  struct vsp1_dl_entry {
>  	u32 addr;
>  	u32 data;
> -} __attribute__((__packed__));
> +} __packed;

Do these structures ever actually appear in misaligned memory?
If they don't then they shouldn't be marked 'packed'.

	David

  reply	other threads:[~2018-03-13 11:19 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <cover.50cd35ac550b4477f13fb4f3fbd3ffb6bcccfc8a.1520632434.git-series.kieran.bingham+renesas@ideasonboard.com>
2018-03-09 22:03 ` [PATCH 01/11] media: vsp1: drm: Fix minor grammar error Kieran Bingham
2018-03-09 22:04 ` [PATCH 02/11] media: vsp1: use kernel __packed for structures Kieran Bingham
2018-03-13 11:20   ` David Laight [this message]
2018-03-13 11:47     ` Kieran Bingham
2018-03-13 12:38       ` David Laight
2018-03-13 14:03         ` Kieran Bingham
2018-03-13 22:34           ` Kieran Bingham
2018-03-09 22:04 ` [PATCH 03/11] media: vsp1: Rename dl_child to dl_next Kieran Bingham
2018-03-09 22:04 ` [PATCH 04/11] media: vsp1: Remove unused display list structure field Kieran Bingham
2018-03-09 22:04 ` [PATCH 05/11] media: vsp1: Clean up DLM objects on error Kieran Bingham
2018-03-09 22:04 ` [PATCH 06/11] media: vsp1: Provide VSP1 feature helper macro Kieran Bingham
2018-03-09 22:04 ` [PATCH 07/11] media: vsp1: Use header display lists for all WPF outputs linked to the DU Kieran Bingham
2018-03-09 22:04 ` [PATCH 08/11] media: vsp1: Add support for extended display list headers Kieran Bingham
2018-03-09 22:04 ` [PATCH 09/11] media: vsp1: Provide support for extended command pools Kieran Bingham
2018-03-10 11:26   ` Kieran Bingham
2018-03-12 16:30   ` jacopo mondi
2018-03-13 10:27     ` Kieran Bingham
2018-03-09 22:04 ` [PATCH 10/11] media: vsp1: Support Interlaced display pipelines Kieran Bingham
2018-03-09 22:04 ` [PATCH 11/11] drm: rcar-du: Support interlaced video output through vsp1 Kieran Bingham

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