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Re: [PATCH for-4.22] xen/efi: Use blexit() instead of BUG_ON() in read_file()
- To: Jan Beulich <jbeulich@xxxxxxxx>, Szymon Acedański <accek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 2 Jun 2026 14:10:34 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- Delivery-date: Tue, 02 Jun 2026 13:10:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02/06/2026 1:34 pm, Jan Beulich wrote:
> On 02.06.2026 14:24, Szymon Acedański wrote:
>> Follow-up to 880e40b187aa ("xen/efi: Fix boot from a device without
>> a file system"), which added a BUG_ON() guard in read_file().
>>
>> But as Jan pointed out, before ExitBootServices BUG_ON()
>> is not functional. It results in a hang with no message.
>>
>> On the other hand blexit() prints a message and returns back
>> to the bootloader.
>>
>> Link:
>> https://lore.kernel.org/xen-devel/bb0f007e-697e-4501-97ea-3b59cf494ec6@xxxxxxxx/T/#m4725c8cbc0946a5533aea03fc240267ef139648d
> While Linux uses Link:, as per sending-patches.pandoc we don't. It wants
> to be Reported-by: instead, and there wants to be a Fixes: tag.
>
>> Signed-off-by: Szymon Acedański <accek@xxxxxxxxxxxxxxxxxxxxxx>
> With the above properly sorted:
> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
CC Oleksi. We're past RC1 now, so everything needs release acks.
~Andrew
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