linux-kernel - Re: [PATCH] powerpc/bug: Remove specific powerpc BUG

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Message-ID: <20210211115059.GB28121@gate.crashing.org>
Date:   Thu, 11 Feb 2021 05:50:59 -0600
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     Nicholas Piggin <npiggin@...il.com>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/bug: Remove specific powerpc BUG_ON()

On Thu, Feb 11, 2021 at 08:04:55PM +1000, Nicholas Piggin wrote:
> It would be nice if we could have a __builtin_trap_if that gcc would use 
> conditional traps with, (and which never assumes following code is 
> unreachable even for constant true, so we can use it with WARN and put 
> explicit unreachable for BUG).

It automatically does that with just __builtin_trap, see my other mail :-)


Segher