On Wed, Oct 05, 2011 at 12:01:27AM +0100, Russell King - ARM Linux wrote: > On Tue, Sep 27, 2011 at 01:10:04PM +0100, Mark Brown wrote: > > On Tue, Sep 27, 2011 at 03:42:45PM +0530, Rajendra Nayak wrote: > > > > > + init_data = devm_kzalloc(dev, sizeof(struct regulator_init_data), > > > + GFP_KERNEL); > > > + if (!init_data) > > > + return NULL; /* Out of memory? */ > > > > This means that the init data will be kept around for the entire > > lifetime of the device rather than being discarded. > > May I remind you that devm_* lifetime expires whenever the associated > driver is unbound, which can be much shorter than the lifetime of the > struct device. > > It expires when any of the following occurs: > 1. userspace asks the associated driver to be unbound > 2. the driver is removed > 3. any driver probe for this struct device fails > 4. the struct device is unregistered. > > So: don't use devm_* for anything other than stuff inside a driver being > associated with the struct device itself. Other uses are a bug waiting > to happen.
Yes, Russell is right. There were a number of places where I suggested using devm_* in entirely the wrong places. Double check anyplace where you've added devm_ calls. g. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
