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bh=8j7vPXQ8NnTfCALzCvlEWGGchYaunD8ZmjFF9OfryBo=; b=rbDVqvullL1FHuAlsFQU7+YLOR09uIvpZnW6+6UM+S7pgEqPxhXHFowX03t2Jjlsq+ SMGz8AiECyjUQ56ZO7W8lNaOieW3orkbj2xWJ/FksRBGrM0aMMDO5dCr4zF4l8am3p9V gK8+tuDM5QPdh/AEk8NgP6EcbNr160auzOT3JP42Sew0zOFUdTr5O46YBsH7QYyLXX6y GuR+oHoRaVh+PV8zUfypkZNPg6UR08EcmbBeZJrNXzDNRhYxDIhGry6hDIy7b/tVuvPU hub4VSzpPap2jLMFJp6mqUMQbSZKsiTkbKLUB8fyDQ3qcOpsqLO/Fgdj+JXtrihWxHYc VDAg== X-Gm-Message-State: APjAAAUKMiYU2XTI+KhurxCxM+X/eUM+R3auA82cKkrX6vlxCTJZs4OV /8hcMWdmO1qCUaxxG+P0Mye7W7s= X-Google-Smtp-Source: APXvYqxweGS12eq7xzPRA2TGNxLW34igZlRxFgUer0mcaJqfFCqFllIcyokHKrPw9a9xIZBKM24v8g== X-Received: by 2002:a17:90a:e653:: with SMTP id ep19mr6606383pjb.58.1580395671183; Thu, 30 Jan 2020 06:47:51 -0800 (PST) Received: from madhuparna-HP-Notebook.nitk.ac.in ([2402:3a80:1ee1:f815:d421:7a49:b2e4:2bd6]) by smtp.gmail.com with ESMTPSA id b1sm7204927pfg.182.2020.01.30.06.47.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Jan 2020 06:47:50 -0800 (PST) From: madhuparnabhowmik10@gmail.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, olsa@redhat.com, namhyung@kernel.org Cc: linux-kernel@vger.kernel.org, frextrite@gmail.com, joel@joelfernandes.org, paulmck@kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, Madhuparna Bhowmik Subject: [PATCH] perf_event.h: Add RCU Annotation to struct ring_buffer in perf_event Date: Thu, 30 Jan 2020 20:17:28 +0530 Message-Id: <20200130144728.24072-1-madhuparnabhowmik10@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Madhuparna Bhowmik This patch fixes the following sparse errors in events/core.c and events/ring_buffer.c by adding RCU Annotation to struct ring_buffer in perf_event: kernel/events/core.c:5597:9: error: incompatible types in comparison expression kernel/events/core.c:5303:22: error: incompatible types in comparison expression kernel/events/core.c:5439:14: error: incompatible types in comparison expression kernel/events/core.c:5472:14: error: incompatible types in comparison expression kernel/events/core.c:5529:14: error: incompatible types in comparison expression kernel/events/core.c:5615:14: error: incompatible types in comparison expression kernel/events/core.c:5615:14: error: incompatible types in comparison expression kernel/events/core.c:7183:13: error: incompatible types in comparison expression kernel/events/ring_buffer.c:169:14: error: incompatible types in comparison expression Signed-off-by: Madhuparna Bhowmik --- include/linux/perf_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 6d4c22aee384..1691107d2800 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -694,7 +694,7 @@ struct perf_event { struct mutex mmap_mutex; atomic_t mmap_count; - struct ring_buffer *rb; + struct ring_buffer __rcu *rb; struct list_head rb_entry; unsigned long rcu_batches; int rcu_pending; -- 2.17.1