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AJvYcCUFBsiW3uv1jk9dSz2FnEKCJrrNYXdg6aPA+AhpOce6Ad4/Lwh8qMfy7widjptFpb+ss1zYDTBdlXn9qsI=@vger.kernel.org X-Gm-Message-State: AOJu0YwpgJc8RTIZcaNz3JYWreKJ7LozZpF3fK6bxLmMg31w4AfrClBv nvIlzsmuE0v75g+1+EmTMnboK4cVXNPHhcm+0Xcf/Xmnnoiz3YiXcZNScmrrQ8SqYV9BGgjrpiV aYOZOHOjSDvUXw3ewDJZp5Q== X-Google-Smtp-Source: AGHT+IGPZ/UWfrK0SR54G2w2/hGND79Jxl9Aw93toJ+uqNkdy6qzcC80bA5lVYDqpW5CNdXw1Cx3m0UW7vJbU9iY X-Received: from wmqc21.prod.google.com ([2002:a05:600c:a55:b0:459:dbaa:93aa]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:2f86:b0:3b5:e714:9c1e with SMTP id ffacd0b85a97d-3c494fc5dbemr1259176f8f.12.1755764067796; Thu, 21 Aug 2025 01:14:27 -0700 (PDT) Date: Thu, 21 Aug 2025 09:13:53 +0100 In-Reply-To: <20250821081412.1008261-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250821081412.1008261-1-vdonnefort@google.com> X-Mailer: git-send-email 2.51.0.rc2.233.g662b1ed5c5-goog Message-ID: <20250821081412.1008261-6-vdonnefort@google.com> Subject: [PATCH v6 05/24] tracing: Add init callback to trace remotes From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, aneesh.kumar@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a .init call back so the trace remote callers can add entries to the tracefs directory. Signed-off-by: Vincent Donnefort diff --git a/include/linux/trace_remote.h b/include/linux/trace_remote.h index 1aa99da3c96a..82d26d97a536 100644 --- a/include/linux/trace_remote.h +++ b/include/linux/trace_remote.h @@ -3,9 +3,11 @@ #ifndef _LINUX_TRACE_REMOTE_H #define _LINUX_TRACE_REMOTE_H =20 +#include #include =20 struct trace_remote_callbacks { + int (*init)(struct dentry *d, void *priv); struct trace_buffer_desc * (*load_trace_buffer)(unsigned long size, void *priv); void (*unload_trace_buffer)(struct trace_buffer_desc *desc, void *priv); diff --git a/kernel/trace/trace_remote.c b/kernel/trace/trace_remote.c index 18b2930186cc..8f8eb1f1e889 100644 --- a/kernel/trace/trace_remote.c +++ b/kernel/trace/trace_remote.c @@ -482,6 +482,7 @@ static int trace_remote_init_tracefs(const char *name, = struct trace_remote *remo int trace_remote_register(const char *name, struct trace_remote_callbacks = *cbs, void *priv) { struct trace_remote *remote; + int ret; =20 remote =3D kzalloc(sizeof(*remote), GFP_KERNEL); if (!remote) @@ -498,7 +499,11 @@ int trace_remote_register(const char *name, struct tra= ce_remote_callbacks *cbs, return -ENOMEM; } =20 - return 0; + ret =3D cbs->init ? cbs->init(remote->dentry, priv) : 0; + if (ret) + pr_err("Init failed for trace remote '%s' (%d)\n", name, ret); + + return ret; } =20 void trace_remote_free_buffer(struct trace_buffer_desc *desc) --=20 2.51.0.rc2.233.g662b1ed5c5-goog