linux-kernel - [PATCH 2/3] cciss: add support for blktrace

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Message-ID: <20071119220717.GB4660@roadking.cca.cpqcorp.net>
Date:	Mon, 19 Nov 2007 16:07:17 -0600
From:	Mike Miller <mike.miller@...com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: [PATCH 2/3] cciss: add support for blktrace

Patch 2 of 3
This patch adds support for the blktrace utility. Please consider this for
inclusion. Seems there was already a call to blk_add_trace. This patch adds
ifdef's and includes the header file.

Signed-off-by: Mike Miller <mike.miller@...com>


diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 2ba5a89..61bc0f3 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -41,6 +41,10 @@
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
+#ifdef CONFIG_BLK_DEV_IO_TRACE
+#include <linux/blktrace_api.h>
+#endif /* CONFIG_BLK_DEV_IO_TRACE */
+
 #include <linux/dma-mapping.h>
 #include <linux/blkdev.h>
 #include <linux/genhd.h>
@@ -3013,7 +3017,9 @@ after_error_processing:
 	}
 	cmd->rq->data_len = 0;
 	cmd->rq->completion_data = cmd;
+#ifdef CONFIG_BLK_DEV_IO_TRACE
 	blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
+#endif /* CONFIG_BLK_DEV_IO_TRACE */
 	blk_complete_request(cmd->rq);
 }
 
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