linux-kernel - Re: [PATCH v4 1/4] kgdb: Remove irq flags from roundup

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Date:   Wed, 14 Nov 2018 21:51:13 +0000
From:   Will Deacon <will.deacon@....com>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     Jason Wessel <jason.wessel@...driver.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        kgdb-bugreport@...ts.sourceforge.net,
        Peter Zijlstra <peterz@...radead.org>,
        linux-mips@...ux-mips.org, linux-sh@...r.kernel.org,
        Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        sparclinux@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        James Hogan <jhogan@...nel.org>, linux-hexagon@...r.kernel.org,
        x86@...nel.org, Vineet Gupta <vgupta@...opsys.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michal Hocko <mhocko@...e.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        linux-snps-arc@...ts.infradead.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Burton <paul.burton@...s.com>,
        Ingo Molnar <mingo@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org,
        Christophe Leroy <christophe.leroy@....fr>,
        Huang Ying <ying.huang@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Rich Felker <dalias@...c.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Paul Mackerras <paulus@...ba.org>,
        Richard Kuo <rkuo@...eaurora.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v4 1/4] kgdb: Remove irq flags from roundup

On Mon, Nov 12, 2018 at 10:26:55AM -0800, Douglas Anderson wrote:
> The function kgdb_roundup_cpus() was passed a parameter that was
> documented as:
> 
> > the flags that will be used when restoring the interrupts. There is
> > local_irq_save() call before kgdb_roundup_cpus().
> 
> Nobody used those flags.  Anyone who wanted to temporarily turn on
> interrupts just did local_irq_enable() and local_irq_disable() without
> looking at them.  So we can definitely remove the flags.
> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---

Acked-by: Will Deacon <will.deacon@....com>

I'm hopeful that you'll keep hacking on kgdb, because it definitely needs
some love in its current state.

Will