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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 +#include #include 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 2221705f65f4..6f4b921f6955 100644 --- a/kernel/trace/trace_remote.c +++ b/kernel/trace/trace_remote.c @@ -479,6 +479,7 @@ 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; remote = kzalloc(sizeof(*remote), GFP_KERNEL); if (!remote) @@ -495,7 +496,11 @@ int trace_remote_register(const char *name, struct trace_remote_callbacks *cbs, return -ENOMEM; } - return 0; + ret = cbs->init ? cbs->init(remote->dentry, priv) : 0; + if (ret) + pr_err("Init failed for trace remote '%s' (%d)\n", name, ret); + + return ret; } void trace_remote_free_buffer(struct trace_buffer_desc *desc) -- 2.49.0.967.g6a0df3ecc3-goog