From 7962fc376f603547b130c0fd7932ac6e9df4ee8b Mon Sep 17 00:00:00 2001
From: Baolin Wang <baolin.wang@linaro.org>
Date: Thu, 31 Mar 2016 11:16:27 +0800
Subject: mmc: core: Provide tracepoints for request processing

This patch provides some tracepoints for the lifecycle of a mmc request
from starting to completion to help with performance analysis of MMC
subsystem.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/core/core.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers/mmc/core')

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 41b1e761965f..f80b3ab3266a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -36,6 +36,9 @@
 #include <linux/mmc/sd.h>
 #include <linux/mmc/slot-gpio.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/mmc.h>
+
 #include "core.h"
 #include "bus.h"
 #include "host.h"
@@ -140,6 +143,8 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
 			cmd->retries = 0;
 	}
 
+	trace_mmc_request_done(host, mrq);
+
 	if (err && cmd->retries && !mmc_card_removed(host->card)) {
 		/*
 		 * Request starter must handle retries - see
@@ -215,6 +220,8 @@ static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 		}
 	}
 
+	trace_mmc_request_start(host, mrq);
+
 	host->ops->request(host, mrq);
 }
 
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