linux-kernel - Re: [PATCH] EDAC: constantify the struct bus

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Message-ID: <20231228150003.GAZY2Nc38sAIa0bat/@fat_crate.local>
Date: Thu, 28 Dec 2023 16:00:03 +0100
From: Borislav Petkov <bp@...en8.de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: tony.luck@...el.com, linux-kernel@...r.kernel.org,
	James Morse <james.morse@....com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Robert Richter <rric@...nel.org>, linux-edac@...r.kernel.org
Subject: Re: [PATCH] EDAC: constantify the struct bus_type usage

On Tue, Dec 19, 2023 at 02:13:10PM +0100, Greg Kroah-Hartman wrote:
> In many places in the edac code, struct bus_type pointers are passed
> around and then eventually sent to the driver core, which can handle a
> constant pointer.  So constantify all of the edac usage of these as well
> because the data in them is never modified by the edac code either.

"constantify", huh? Not enough words in the English language so let's do
new ones?

:-)

So what's the plan with this "constantification"?

Because:

drivers/edac/edac_module.c: In function ‘edac_subsys_init’:
drivers/edac/edac_module.c:80:38: warning: passing argument 1 of ‘subsys_system_register’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
   80 |         err = subsys_system_register(&edac_subsys, NULL);
      |                                      ^~~~~~~~~~~~
In file included from ./include/linux/edac.h:16,
                 from drivers/edac/edac_module.c:13:
./include/linux/device.h:75:45: note: expected ‘struct bus_type *’ but argument is of type ‘const struct bus_type *’
   75 | int subsys_system_register(struct bus_type *subsys,
      |

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette