linux-kernel - Re: [RFC][PATCH 2/9] perf: core, remove hw_perf_event

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <1273486670.15998.80.camel@minggr.sh.intel.com>
Date:	Mon, 10 May 2010 18:17:50 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"eranian@...il.com" <eranian@...il.com>,
	"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Paul Mundt <lethal@...ux-sh.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 2/9] perf: core, remove hw_perf_event_init

On Mon, 2010-05-10 at 17:40 +0800, Peter Zijlstra wrote:
> On Mon, 2010-05-10 at 17:26 +0800, Lin Ming wrote:
> > +static struct pmu *perf_event_lookup_pmu(struct perf_event *event)
> > +{
> > +       struct pmu *pmu;
> > +       int pmu_id = event->attr.pmu_id;
> > +
> > +       list_for_each_entry(pmu, &pmus, entry) {
> > +               if (pmu->id == pmu_id)
> > +                       return pmu;
> > +       }
> > +
> > +       return NULL;
> > +}
> 
> > +void perf_event_register_pmu(struct pmu *pmu)
> > +{
> > +       pmu->id = pmu_id_curr++;
> > +       list_add_tail(&pmu->entry, &pmus);
> > +} 
> 
> That will be wanting some sort of synchronization

Will add a mutex to protect the list of pmus.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/