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| author | Phil Carmody <ext-phil.2.carmody@nokia.com> | 2011-07-14 16:07:13 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2011-07-21 16:10:00 +0400 |
| commit | 497888cf69bf607ac1fe061a6437e0a670b0022f (patch) | |
| tree | ac0897eff214f09c89d5f4fbc3c03ef9d010a83c /drivers/hwmon/gl520sm.c | |
| parent | 06b72d06d6b182bdaaaec686dbd8b602949521ee (diff) | |
| download | linux-497888cf69bf607ac1fe061a6437e0a670b0022f.tar.xz | |
treewide: fix potentially dangerous trailing ';' in #defined values/expressions
All these are instances of
#define NAME value;
or
#define NAME(params_opt) value;
These of course fail to build when used in contexts like
if(foo $OP NAME)
while(bar $OP NAME)
and may silently generate the wrong code in contexts such as
foo = NAME + 1; /* foo = value; + 1; */
bar = NAME - 1; /* bar = value; - 1; */
baz = NAME & quux; /* baz = value; & quux; */
Reported on comp.lang.c,
Message-ID: <ab0d55fe-25e5-482b-811e-c475aa6065c3@c29g2000yqd.googlegroups.com>
Initial analysis of the dangers provided by Keith Thompson in that thread.
There are many more instances of more complicated macros having unnecessary
trailing semicolons, but this pile seems to be all of the cases of simple
values suffering from the problem. (Thus things that are likely to be found
in one of the contexts above, more complicated ones aren't.)
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hwmon/gl520sm.c')
| -rw-r--r-- | drivers/hwmon/gl520sm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c index ec588026f0a9..131ea8625f08 100644 --- a/drivers/hwmon/gl520sm.c +++ b/drivers/hwmon/gl520sm.c @@ -273,7 +273,7 @@ static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR, #define DIV_FROM_REG(val) (1 << (val)) #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div)))) -#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)); +#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)) static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr, char *buf) |