linux-kernel - [PATCH 3/5] ide: add a driver-wide debugging macro

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Date:	Sun, 17 Aug 2008 19:23:44 +0200
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Bartlomiej@...lum.tnic, Zolnierkiewicz@...lum.tnic,
	<bzolnier@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Borislav Petkov <petkovbb@...il.com>
Subject: [PATCH 3/5] ide: add a driver-wide debugging macro

Add __ide_debug_log() debugging macro which is controlled by drive->debug_mask.
The macro has to have the macro DRV_NAME defined in each driver before use.
Also, add different debugging levels depending on the functionality debugged.

Signed-off-by: Borislav Petkov <petkovbb@...il.com>
---
 include/linux/ide.h |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/include/linux/ide.h b/include/linux/ide.h
index c161840..b6d714d 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -925,6 +925,26 @@ static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *
 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 #endif
 
+enum {
+	/* enter/exit functions */
+	IDE_DBG_FUNC =			(1 << 0),
+	/* sense key/asc handling */
+	IDE_DBG_SENSE =			(1 << 1),
+	/* packet commands handling */
+	IDE_DBG_PC =			(1 << 2),
+	/* request handling */
+	IDE_DBG_RQ =			(1 << 3),
+	/* driver probing/setup */
+	IDE_DBG_PROBE =			(1 << 4),
+};
+
+/* DRV_NAME has to be defined in the driver before using the macro below */
+#define __ide_debug_log(lvl, fmt, args...)			\
+{								\
+	if (unlikely(drive->debug_mask & lvl))			\
+		printk(KERN_INFO DRV_NAME ": " fmt, ## args);	\
+}
+
 /*
  * Power Management step value (rq->pm->pm_step).
  *
-- 
1.5.5.4

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