linux-kernel - [patch] pktcdvd: silence static checker warning

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Message-ID: <20130516081108.GC7494@elgon.mountain>
Date:	Thu, 16 May 2013 11:11:08 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] pktcdvd: silence static checker warning

Static checkers complain about widening the binary "not" operations here
because sectors are u64 and "(pd)->settings.size" is unsigned int.
It unintentionally clears the high 32 bits of the sector.  This means
that the driver won't work for devices with over 2TB of space.  Since
this is a DVD drive, we're unlikely to reach that limit, but we may as
well silence the warning.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 898fa74..09142c4 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -83,7 +83,8 @@
 
 #define MAX_SPEED 0xffff
 
-#define ZONE(sector, pd) (((sector) + (pd)->offset) & ~((pd)->settings.size - 1))
+#define ZONE(sector, pd) (((sector) + (pd)->offset) & \
+			~(sector_t)((pd)->settings.size - 1))
 
 static DEFINE_MUTEX(pktcdvd_mutex);
 static struct pktcdvd_device *pkt_devs[MAX_WRITERS];
--
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