Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Tue, 20 Dec 2022 08:37:17 +0100
From:   Johan Hovold <johan@kernel.org>
To:     "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [GIT PULL] random number generator fixes for 6.2-rc1, part 2
Message-ID: <Y6FmLZqcf0nmcEMV@hovoldconsulting.com>
References: <20221220022458.11682-1-Jason@zx2c4.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20221220022458.11682-1-Jason@zx2c4.com>
Precedence: bulk

On Tue, Dec 20, 2022 at 03:24:58AM +0100, Jason A. Donenfeld wrote:

> In addition, there is one fix:
> 
> - Check efi_rt_services_supported() before attempting to use an EFI runtime
>   function. This affected EFI systems that disable runtime services yet still
>   boot via EFI (e.g. the reporter's Dell arm64 laptop), as well systems where

Nit: This caused trouble on the Lenovo Thinkpad X13s that we're working
on supporting in mainline (i.e. not Dell).

>   EFI runtime services have been forcibly disabled, such as on PREEMPT_RT. On
>   those machines, a very early and hard to diagnose crash would happen,
>   preventing boot.

Johan