linux-kernel - Re: [PATCH] RAS/AMD/FMPM: Fix build when debugfs is not enabled

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Date: Tue, 26 Mar 2024 10:22:05 -0400
From: Yazen Ghannam <yazen.ghannam@....com>
To: Borislav Petkov <bp@...en8.de>
Cc: yazen.ghannam@....com, linux-edac <linux-edac@...r.kernel.org>,
 LKML <linux-kernel@...r.kernel.org>,
 "anthony s . k ." <akira.2020@...tonmail.com>
Subject: Re: [PATCH] RAS/AMD/FMPM: Fix build when debugfs is not enabled

On 3/26/24 10:07, Borislav Petkov wrote:
> On Tue, Mar 26, 2024 at 09:41:41AM -0400, Yazen Ghannam wrote:
>> This isn't true which is why the module doesn't fail to load if debugfs
>> is not available.
> 
> How useful is this thing really without debugfs to dump records?
>

The goal of the module is to save and restore records across reboots.

The debugfs thing came later and the commit message states that it is
optional.

7d19eea51757 ("RAS/AMD/FMPM: Add debugfs interface to print record entries")

>> This was my first thought too. However, besides not true as stated
>> above, this also leaves the issue open for others to hit.
> 
> The others to hit? I don't get that part.
>

Sorry, I mean that if there's another user of ras_get_debugfs_root()
that doesn't depend on CONFIG_DEBUG_FS.

>> I think the fix below (not tested) would be more appropriate.
>>
>> What do you think?
> 
> Sure, remove my fix and send me a tested version of yours and I'll swap
> them if the driver is useful without debugfs...

Okay, will do.

Thanks,
Yazen