linux-kernel - Re: [PATCH 09/21] fbcon: Replace FBCON_FLAGS

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Date:   Tue, 1 Feb 2022 11:37:38 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Daniel Vetter <daniel.vetter@...ll.ch>,
        DRI Development <dri-devel@...ts.freedesktop.org>
Cc:     Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        linux-fbdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Du Cheng <ducheng2@...il.com>, Claudio Suarez <cssk@...-c.es>
Subject: Re: [PATCH 09/21] fbcon: Replace FBCON_FLAGS_INIT with a boolean



Am 31.01.22 um 22:05 schrieb Daniel Vetter:
> It's only one flag and slightly tidier code.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Du Cheng <ducheng2@...il.com>
> Cc: Thomas Zimmermann <tzimmermann@...e.de>
> Cc: Claudio Suarez <cssk@...-c.es>

Acked-by: Thomas Zimmermann <tzimmermann@...e.de>

> ---
>   drivers/video/fbdev/core/fbcon.c | 11 +++++------
>   drivers/video/fbdev/core/fbcon.h |  4 +---
>   2 files changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index affb40658fee..fa30e1909164 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -773,7 +773,7 @@ static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
>   
>   	ops->currcon = fg_console;
>   
> -	if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
> +	if (info->fbops->fb_set_par && !ops->initialized) {
>   		ret = info->fbops->fb_set_par(info);
>   
>   		if (ret)
> @@ -782,7 +782,7 @@ static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
>   				"error code %d\n", ret);
>   	}
>   
> -	ops->flags |= FBCON_FLAGS_INIT;
> +	ops->initialized = true;
>   	ops->graphics = 0;
>   	fbcon_set_disp(info, &info->var, unit);
>   
> @@ -1101,8 +1101,7 @@ static void fbcon_init(struct vc_data *vc, int init)
>   	 * We need to do it in fbcon_init() to prevent screen corruption.
>   	 */
>   	if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
> -		if (info->fbops->fb_set_par &&
> -		    !(ops->flags & FBCON_FLAGS_INIT)) {
> +		if (info->fbops->fb_set_par && !ops->initialized) {
>   			ret = info->fbops->fb_set_par(info);
>   
>   			if (ret)
> @@ -1111,7 +1110,7 @@ static void fbcon_init(struct vc_data *vc, int init)
>   					"error code %d\n", ret);
>   		}
>   
> -		ops->flags |= FBCON_FLAGS_INIT;
> +		ops->initialized = true;
>   	}
>   
>   	ops->graphics = 0;
> @@ -1186,7 +1185,7 @@ static void fbcon_deinit(struct vc_data *vc)
>   	if (con_is_visible(vc))
>   		fbcon_del_cursor_work(info);
>   
> -	ops->flags &= ~FBCON_FLAGS_INIT;
> +	ops->initialized = false;
>   finished:
>   
>   	fbcon_free_font(p, free_font);
> diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h
> index dce5ce41093e..b18d0cbf73b6 100644
> --- a/drivers/video/fbdev/core/fbcon.h
> +++ b/drivers/video/fbdev/core/fbcon.h
> @@ -18,8 +18,6 @@
>   
>   #include <asm/io.h>
>   
> -#define FBCON_FLAGS_INIT         1
> -
>      /*
>       *    This is the interface between the low-level console driver and the
>       *    low-level frame buffer device
> @@ -77,7 +75,7 @@ struct fbcon_ops {
>   	int    blank_state;
>   	int    graphics;
>   	int    save_graphics; /* for debug enter/leave */
> -	int    flags;
> +	bool   initialized;

This will add 3 bytes of padding. Maybe you can put the bool elsewhere.

>   	int    rotate;
>   	int    cur_rotate;
>   	char  *cursor_data;

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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