linux-kernel - [PATCH for 4.9 15/39] drivers/rapidio/devices/tsi721.c: make module parameter variable name unique

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Date:   Mon, 18 Sep 2017 00:19:40 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matt Porter <mporter@...nel.crashing.org>,
        Alexandre Bounine <alexandre.bounine@....com>,
        Jérémy Lefaure <jeremy.lefaure@....epita.fr>,
        "Andrew Morton" <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH for 4.9 15/39] drivers/rapidio/devices/tsi721.c: make module
 parameter variable name unique

From: Randy Dunlap <rdunlap@...radead.org>

[ Upstream commit 4785603bd05b0b029c647080937674d9991600f9 ]

kbuild test robot reported a non-static variable name collision between
a staging driver and a RapidIO driver, with a generic variable name of
'dbg_level'.

Both drivers should be changed so that they don't use this generic
public variable name.  This patch fixes the RapidIO driver but does not
change the user interface (name) for the module parameter.

  drivers/staging/built-in.o:(.bss+0x109d0): multiple definition of `dbg_level'
  drivers/rapidio/built-in.o:(.bss+0x16c): first defined here

Link: http://lkml.kernel.org/r/ab527fc5-aa3c-4b07-5d48-eef5de703192@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reported-by: kbuild test robot <fengguang.wu@...el.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Matt Porter <mporter@...nel.crashing.org>
Cc: Alexandre Bounine <alexandre.bounine@....com>
Cc: Jérémy Lefaure <jeremy.lefaure@....epita.fr>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/rapidio/devices/tsi721.c | 4 ++--
 drivers/rapidio/devices/tsi721.h | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index 9d19b9a62011..315a4be8dc1e 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -37,8 +37,8 @@
 #include "tsi721.h"
 
 #ifdef DEBUG
-u32 dbg_level;
-module_param(dbg_level, uint, S_IWUSR | S_IRUGO);
+u32 tsi_dbg_level;
+module_param_named(dbg_level, tsi_dbg_level, uint, S_IWUSR | S_IRUGO);
 MODULE_PARM_DESC(dbg_level, "Debugging output level (default 0 = none)");
 #endif
 
diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h
index 5941437cbdd1..957eadc58150 100644
--- a/drivers/rapidio/devices/tsi721.h
+++ b/drivers/rapidio/devices/tsi721.h
@@ -40,11 +40,11 @@ enum {
 };
 
 #ifdef DEBUG
-extern u32 dbg_level;
+extern u32 tsi_dbg_level;
 
 #define tsi_debug(level, dev, fmt, arg...)				\
 	do {								\
-		if (DBG_##level & dbg_level)				\
+		if (DBG_##level & tsi_dbg_level)				\
 			dev_dbg(dev, "%s: " fmt "\n", __func__, ##arg);	\
 	} while (0)
 #else
-- 
2.11.0