linux-kernel - Re: [PATCH 07/10] uprobes/x86: Introduce arch_uretprobe_is

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Message-ID: <5559D627.7080201@redhat.com>
Date:	Mon, 18 May 2015 17:38:07 +0530
From:	Pratyush Anand <panand@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anton Arapov <arapov@...il.com>,
	David Long <dave.long@...aro.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Jan Willeke <willeke@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Mark Wielaard <mjw@...hat.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] uprobes/x86: Introduce arch_uretprobe_is_alive()

Hi Oleg,

On Monday 04 May 2015 06:19 PM, Oleg Nesterov wrote:
> +bool __weak arch_uretprobe_is_alive(struct arch_uretprobe *auret, struct pt_regs *regs)
> +{
> +	return true;
> +}

IIUC, then this function should return false when both auret and regs 
are corresponding to same retprobe, else we need to return true, right?

If that is the case, then should n't following work for all the cases:

return sp != auret->sp;

~Pratyush

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