linux-kernel - [PATCHv5 3/3] USB: gadget: storage_common: fixed warning building mass storage function

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Date:	Wed, 28 Jul 2010 14:13:53 +0200
From:	Michal Nazarewicz <m.nazarewicz@...sung.com>
To:	Greg KH <greg@...ah.com>, David Brownell <david-b@...bell.net>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCHv5 3/3] USB: gadget: storage_common: fixed warning building mass
 storage function

The "nofua" attribute is used in the File-Storage Gadget but the
functions handling it are defined in storage_common.c (which may be
not a bad thing if anyone will want to port tho "nofua" attribute to
mass storage function) which causes the following warnings:

drivers/usb/gadget/storage_common.c:718: \
  warning: ‘fsg_show_nofua’ defined but not used
drivers/usb/gadget/storage_common.c:782: \
  warning: ‘fsg_store_nofua’ defined but not used

Adding __maybe_unused fixes this issue.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@...sung.com>
Cc: Andy Shevchenko <andy.shevchenko@...il.com>
---
 drivers/usb/gadget/storage_common.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c
index 484acfb..3379cc3 100644
--- a/drivers/usb/gadget/storage_common.c
+++ b/drivers/usb/gadget/storage_common.c
@@ -715,8 +715,8 @@ static ssize_t fsg_show_ro(struct device *dev, struct device_attribute *attr,
 				  : curlun->initially_ro);
 }
 
-static ssize_t fsg_show_nofua(struct device *dev, struct device_attribute *attr,
-			      char *buf)
+static ssize_t __maybe_unused
+fsg_show_nofua(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct fsg_lun	*curlun = fsg_lun_from_dev(dev);
 
@@ -779,9 +779,9 @@ static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr,
 	return rc;
 }
 
-static ssize_t fsg_store_nofua(struct device *dev,
-			       struct device_attribute *attr,
-			       const char *buf, size_t count)
+static ssize_t __maybe_unused
+fsg_store_nofua(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
 {
 	struct fsg_lun	*curlun = fsg_lun_from_dev(dev);
 	unsigned long	nofua;
-- 
1.7.1

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