Re: [x86] BUG()/BUG_ON() macros cannot be disabled

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To: Arnd Bergmann <arnd@xxxxxxxx>
Subject: Re: [x86] BUG()/BUG_ON() macros cannot be disabled
From: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 25 Sep 2018 14:31:05 +0200
Cc: alexander.lochmann@xxxxxxxxxxxxxx, linux-arch <linux-arch@xxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <CAK8P3a1sO9HtJPo0S=s3MFK4TN0s_raNTWRTYCYBTGiyHuXg_A@mail.gmail.com>
References: <9516e4b3-f9f2-b150-f019-8b1ef465efb3@tu-dortmund.de> <CAK8P3a1sO9HtJPo0S=s3MFK4TN0s_raNTWRTYCYBTGiyHuXg_A@mail.gmail.com>

Hello Arnd,

On Tuesday, September 25, 2018, 2:06:38 PM CEST Arnd Bergmann wrote:
> We don't really want an empty macro any more, this was used in
> the past, but causes compile-time warnings and undefined behavior
> for no good reason.

Can you elaborate or point me to some other discussion about that undefined behavior?

Best regards,
Alexander

References:
- [x86] BUG()/BUG_ON() macros cannot be disabled
  - From: Alexander Lochmann
- Re: [x86] BUG()/BUG_ON() macros cannot be disabled
  - From: Arnd Bergmann

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