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Mon, 12 Jun 2023 11:38:53 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id B3A0A30A77B6B; Mon, 12 Jun 2023 11:38:48 +0200 (CEST) Message-ID: <20230612093539.895253662@infradead.org> User-Agent: quilt/0.66 Date: Mon, 12 Jun 2023 11:07:46 +0200 From: Peter Zijlstra To: torvalds@linux-foundation.org, keescook@chromium.org, gregkh@linuxfoundation.org, pbonzini@redhat.com Cc: masahiroy@kernel.org, nathan@kernel.org, ndesaulniers@google.com, nicolas@fjasle.eu, catalin.marinas@arm.com, will@kernel.org, vkoul@kernel.org, trix@redhat.com, ojeda@kernel.org, peterz@infradead.org, mingo@redhat.com, longman@redhat.com, boqun.feng@gmail.com, dennis@kernel.org, tj@kernel.org, cl@linux.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, irogers@google.com, adrian.hunter@intel.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, paulmck@kernel.org, frederic@kernel.org, quic_neeraju@quicinc.com, joel@joelfernandes.org, josh@joshtriplett.org, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, rientjes@google.com, vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, apw@canonical.com, joe@perches.com, dwaipayanray1@gmail.com, lukas.bulwahn@gmail.com, john.johansen@canonical.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, llvm@lists.linux.dev, linux-perf-users@vger.kernel.org, rcu@vger.kernel.org, linux-security-module@vger.kernel.org, tglx@linutronix.de, ravi.bangoria@amd.com, error27@gmail.com, luc.vanoostenryck@gmail.com Subject: [PATCH v3 33/57] perf: Simplify perf_adjust_freq_unthr_context() References: <20230612090713.652690195@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: Signed-off-by: Peter Zijlstra (Intel) --- kernel/events/core.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -4100,7 +4100,7 @@ perf_adjust_freq_unthr_context(struct pe if (!(ctx->nr_freq || unthrottle)) return; - raw_spin_lock(&ctx->lock); + guard(raw_spinlock)(&ctx->lock); list_for_each_entry_rcu(event, &ctx->event_list, event_entry) { if (event->state != PERF_EVENT_STATE_ACTIVE) @@ -4110,7 +4110,7 @@ perf_adjust_freq_unthr_context(struct pe if (!event_filter_match(event)) continue; - perf_pmu_disable(event->pmu); + guard(perf_pmu_disable)(event->pmu); hwc = &event->hw; @@ -4121,7 +4121,7 @@ perf_adjust_freq_unthr_context(struct pe } if (!event->attr.freq || !event->attr.sample_freq) - goto next; + continue; /* * stop the event and update event->count @@ -4143,11 +4143,7 @@ perf_adjust_freq_unthr_context(struct pe perf_adjust_period(event, period, delta, false); event->pmu->start(event, delta > 0 ? PERF_EF_RELOAD : 0); - next: - perf_pmu_enable(event->pmu); } - - raw_spin_unlock(&ctx->lock); } /*