linux-kernel - Re: [PATCH 07/10] perf: Directly pass PERF_AUX_* flags to perf_aux_output

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170217140001.GD15431@arm.com>
Date:   Fri, 17 Feb 2017 14:00:01 +0000
From:   Will Deacon <will.deacon@....com>
To:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:     linux-arm-kernel@...ts.infradead.org, marc.zyngier@....com,
        mark.rutland@....com, kim.phillips@....com, alex.bennee@...aro.org,
        christoffer.dall@...aro.org, tglx@...utronix.de,
        peterz@...radead.org, robh@...nel.org, suzuki.poulose@....com,
        pawel.moll@....com, mathieu.poirier@...aro.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] perf: Directly pass PERF_AUX_* flags to
 perf_aux_output_end

On Fri, Feb 17, 2017 at 03:40:23PM +0200, Alexander Shishkin wrote:
> Will Deacon <will.deacon@....com> writes:
> 
> > @@ -485,7 +485,8 @@ int intel_bts_interrupt(void)
> >  		return handled;
> >  
> >  	perf_aux_output_end(&bts->handle, local_xchg(&buf->data_size, 0),
> > -			    !!local_xchg(&buf->lost, 0));
> > +			    local_xchg(&buf->lost, 0) ?
> > +			    PERF_AUX_FLAG_OVERWRITE : 0);
> 
> Heh, this one would have taken some time to debug. :)

Don't worry, this isn't a bug fix! This patch changes the prototype for
perf_aux_output_end so that it takes the flag instead of a "bool truncated"
parameter, so this is just fixing up the callers at the same time.

Will