From: Peter Zijlstra <peterz@infradead.org>
To: Joe Perches <joe@perches.com>
Cc: Zhu Lingshan <lingshan.zhu@intel.com>,
pbonzini@redhat.com, bp@alien8.de, seanjc@google.com,
vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com,
joro@8bytes.org, weijiang.yang@intel.com,
kan.liang@linux.intel.com, ak@linux.intel.com,
wei.w.wang@intel.com, eranian@google.com,
liuxiangdong5@huawei.com, linux-kernel@vger.kernel.org,
x86@kernel.org, kvm@vger.kernel.org, like.xu.linux@gmail.com,
Like Xu <like.xu@linux.intel.com>, Will Deacon <will@kernel.org>,
Marc Zyngier <maz@kernel.org>, Guo Ren <guoren@kernel.org>,
Nick Hu <nickhu@andestech.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org,
linux-riscv@lists.infradead.org, xen-devel@lists.xenproject.org
Subject: Re: [PATCH V7 01/18] perf/core: Use static_call to optimize perf_guest_info_callbacks
Date: Fri, 2 Jul 2021 18:19:56 +0200 [thread overview]
Message-ID: <YN88rE+cxb7HrEtI@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <7379289718c6826dd1affec5824b749be2aee0a4.camel@perches.com>
On Fri, Jul 02, 2021 at 09:00:22AM -0700, Joe Perches wrote:
> On Fri, 2021-07-02 at 13:22 +0200, Peter Zijlstra wrote:
> > On Tue, Jun 22, 2021 at 05:42:49PM +0800, Zhu Lingshan wrote:
> > > diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
> []
> > > @@ -90,6 +90,27 @@ DEFINE_STATIC_CALL_NULL(x86_pmu_pebs_aliases, *x86_pmu.pebs_aliases);
> > > */
> > > DEFINE_STATIC_CALL_RET0(x86_pmu_guest_get_msrs, *x86_pmu.guest_get_msrs);
> > >
> > >
> > > +DEFINE_STATIC_CALL_RET0(x86_guest_state, *(perf_guest_cbs->state));
> > > +DEFINE_STATIC_CALL_RET0(x86_guest_get_ip, *(perf_guest_cbs->get_ip));
> > > +DEFINE_STATIC_CALL_RET0(x86_guest_handle_intel_pt_intr, *(perf_guest_cbs->handle_intel_pt_intr));
> > > +
> > > +void arch_perf_update_guest_cbs(void)
> > > +{
> > > + static_call_update(x86_guest_state, (void *)&__static_call_return0);
> > > + static_call_update(x86_guest_get_ip, (void *)&__static_call_return0);
> > > + static_call_update(x86_guest_handle_intel_pt_intr, (void *)&__static_call_return0);
> > > +
> > > + if (perf_guest_cbs && perf_guest_cbs->state)
> > > + static_call_update(x86_guest_state, perf_guest_cbs->state);
> > > +
> > > + if (perf_guest_cbs && perf_guest_cbs->get_ip)
> > > + static_call_update(x86_guest_get_ip, perf_guest_cbs->get_ip);
> > > +
> > > + if (perf_guest_cbs && perf_guest_cbs->handle_intel_pt_intr)
> > > + static_call_update(x86_guest_handle_intel_pt_intr,
> > > + perf_guest_cbs->handle_intel_pt_intr);
> > > +}
> >
> > Coding style wants { } on that last if().
>
> That's just your personal preference.
As a maintainer, those carry weight, also that's tip rules:
https://lore.kernel.org/lkml/20181107171149.165693799@linutronix.de/
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next prev parent reply other threads:[~2021-07-02 16:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210622094306.8336-1-lingshan.zhu@intel.com>
2021-06-22 9:42 ` [PATCH V7 01/18] perf/core: Use static_call to optimize perf_guest_info_callbacks Zhu Lingshan
2021-07-02 11:22 ` Peter Zijlstra
2021-07-02 16:00 ` Joe Perches
2021-07-02 16:19 ` Peter Zijlstra [this message]
2021-07-02 16:42 ` Joe Perches
2021-07-02 16:38 ` Mark Rutland
2021-07-02 16:56 ` Joe Perches
2021-07-08 8:53 ` Zhu Lingshan
[not found] <20210622093823.8215-1-lingshan.zhu@intel.com>
2021-06-22 9:38 ` Zhu Lingshan
2021-06-22 17:31 ` Boris Ostrovsky
2021-06-23 9:06 ` Zhu, Lingshan
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