linux-kernel - Re: [PATCH] fbdev: Make registered

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 27 Jul 2022 10:53:53 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Helge Deller <deller@....de>,
        Javier Martinez Canillas <javierm@...hat.com>,
        linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>
Cc:     linux-staging@...ts.linux.dev,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        dri-devel@...ts.freedesktop.org,
        Daniel Vetter <daniel.vetter@...el.com>,
        Alex Deucher <alexander.deucher@....com>,
        Daniel Vetter <daniel@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>, linux-fbdev@...r.kernel.org
Subject: Re: [PATCH] fbdev: Make registered_fb[] private to fbmem.c

Hi

Am 27.07.22 um 06:08 schrieb Helge Deller:
> On 7/26/22 09:22, Helge Deller wrote:
>> On 7/25/22 09:54, Javier Martinez Canillas wrote:
>>> From: Daniel Vetter <daniel.vetter@...ll.ch>
>>>
>>> No driver access this anymore, except for the olpc dcon fbdev driver but
>>> that has been marked as broken anyways by commit de0952f267ff ("staging:
>>> olpc_dcon: mark driver as broken").
>>>
>>> Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
>>> Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
>>> Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>
>>> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
>>
>> I've applied it to the fbdev git tree.
> 
> I've dropped that patch for now from the fbdev git tree, since
> it gave build errors [1] in for-next:
> 
>   drivers/video/fbdev/simplefb.c:426:6: error: use of undeclared identifier 'num_registered_fb'; did you mean 'WB_registered'?
>             if (num_registered_fb > 0) {
>                 ^~~~~~~~~~~~~~~~~

I've added the patch to drm-misc-next. The issue has been fixed there.

Best regards
Thomas

> 
> Helge
> 
> [1] https://lore.kernel.org/all/202207270857.mo9oRcRE-lkp@intel.com/
> 
> 
>>>
>>>   drivers/video/fbdev/core/fbmem.c | 6 +++---
>>>   include/linux/fb.h               | 6 ------
>>>   2 files changed, 3 insertions(+), 9 deletions(-)
>>>
>>> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
>>> index 6ae1c5fa19f9..1e70d8c67653 100644
>>> --- a/drivers/video/fbdev/core/fbmem.c
>>> +++ b/drivers/video/fbdev/core/fbmem.c
>>> @@ -51,10 +51,10 @@
>>>   static DEFINE_MUTEX(registration_lock);
>>>
>>>   struct fb_info *registered_fb[FB_MAX] __read_mostly;
>>> -EXPORT_SYMBOL(registered_fb);
>>> -
>>>   int num_registered_fb __read_mostly;
>>> -EXPORT_SYMBOL(num_registered_fb);
>>> +#define for_each_registered_fb(i)		\
>>> +	for (i = 0; i < FB_MAX; i++)		\
>>> +		if (!registered_fb[i]) {} else
>>>
>>>   bool fb_center_logo __read_mostly;
>>>
>>> diff --git a/include/linux/fb.h b/include/linux/fb.h
>>> index 453c3b2b6b8e..0aff76bcbb00 100644
>>> --- a/include/linux/fb.h
>>> +++ b/include/linux/fb.h
>>> @@ -627,16 +627,10 @@ extern int fb_get_color_depth(struct fb_var_screeninfo *var,
>>>   extern int fb_get_options(const char *name, char **option);
>>>   extern int fb_new_modelist(struct fb_info *info);
>>>
>>> -extern struct fb_info *registered_fb[FB_MAX];
>>> -extern int num_registered_fb;
>>>   extern bool fb_center_logo;
>>>   extern int fb_logo_count;
>>>   extern struct class *fb_class;
>>>
>>> -#define for_each_registered_fb(i)		\
>>> -	for (i = 0; i < FB_MAX; i++)		\
>>> -		if (!registered_fb[i]) {} else
>>> -
>>>   static inline void lock_fb_info(struct fb_info *info)
>>>   {
>>>   	mutex_lock(&info->lock);
>>
> 

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

Download attachment "OpenPGP_signature" of type "application/pgp-signature" (841 bytes)