linux-kernel - Re: [PATCH] arm64: hw-breakpoint: Remove superfluous SMP function call

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Message-ID: <alpine.DEB.2.11.1604051137150.12514@hypnos>
Date:	Tue, 5 Apr 2016 11:39:18 +0200 (CEST)
From:	Anna-Maria Gleixner <anna-maria@...utronix.de>
To:	"Suzuki K. Poulose" <Suzuki.Poulose@....com>
cc:	linux-kernel@...r.kernel.org, rt@...utronix.de,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: hw-breakpoint: Remove superfluous SMP function
 call

On Tue, 5 Apr 2016, Suzuki K. Poulose wrote:

> On 04/04/16 11:42, Anna-Maria Gleixner wrote:
> > Since commit 1cf4f629d9d2 ("cpu/hotplug: Move online calls to
> > hotplugged cpu") it is ensured that callbacks of CPU_ONLINE and
> > CPU_DOWN_PREPARE are processed on the hotplugged cpu. Due to this SMP
> > function calls are no longer required.
> > 
> > Replace smp_call_function_single() with a direct call of
> > hw_breakpoint_reset(). To keep the calling convention, interrupts are
> > explicitely disabled around the call.
> 
> While you are at it, could you please also fix a similar instance
> in arch/arm64/kernel/debug-monitors.c: hw_breakpoint_reset_notify() ?

I already sent a patch for it, but I misspelled the arm mailinglist
address... I bounced it to the mailinglist.

Anna-Maria