linux-kernel - Re: [PATCH 1/4] riscv: avoid kernel hangs when trapped in BUG()

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Date:   Fri, 27 Sep 2019 15:25:18 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Vincent Chen <vincent.chen@...ive.com>
Cc:     linux-riscv@...ts.infradead.org, palmer@...ive.com,
        linux-kernel@...r.kernel.org, aou@...s.berkeley.edu,
        paul.walmsley@...ive.com
Subject: Re: [PATCH 1/4] riscv: avoid kernel hangs when trapped in BUG()

On Mon, Sep 23, 2019 at 08:45:14AM +0800, Vincent Chen wrote:
> When the CONFIG_GENERIC_BUG is disabled by disabling CONFIG_BUG, if a
> kernel thread is trapped by BUG(), the whole system will be in the
> loop that infinitely handles the ebreak exception instead of entering the
> die function. To fix this problem, the do_trap_break() will always call
> the die() to deal with the break exception as the type of break is
> BUG_TRAP_TYPE_BUG.
> 
> Signed-off-by: Vincent Chen <vincent.chen@...ive.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>