linux-kernel - Re: [PATCH 1/5] drivers/base: Add a DEVICE_BOOL

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Date:	Wed, 17 Oct 2012 13:29:00 -0700
From:	Greg Kroah-Hartman <greg@...ah.com>
To:	Borislav Petkov <bp@...64.org>
Cc:	Tony Luck <tony.luck@...el.com>,
	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: Re: [PATCH 1/5] drivers/base: Add a DEVICE_BOOL_ATTR macro

On Wed, Oct 17, 2012 at 10:10:18PM +0200, Borislav Petkov wrote:
> On Wed, Oct 17, 2012 at 12:03:00PM -0700, Greg Kroah-Hartman wrote:
> > On Wed, Oct 17, 2012 at 01:13:51PM +0200, Borislav Petkov wrote:
> > > +ssize_t device_store_bool(struct device *dev, struct device_attribute *attr,
> > > +			  const char *buf, size_t size)
> > > +{
> > > +	struct dev_ext_attribute *ea = to_ext_attr(attr);
> > > +	u8 bval;
> > > +
> > > +	if (kstrtou8(buf, 10, &bval) < 0)
> > > +		return -EINVAL;
> > > +
> > > +	*(bool *)ea->var = !!bval;
> > > +
> > > +	return size;
> > > +}
> > > +EXPORT_SYMBOL_GPL(device_store_bool);
> > 
> > Wouldn't it be nice to be able to accept 'y' 'Y' 'n' 'N' '0' and '1'
> > like the module bool parameter code does?  That would make things a bit
> > more consistent, and possibly allow you to use this function for the
> > module sysfs file handling as well.
> 
> That could be easily done, let me try it tomorrow. Any other letters you
> prefer? Maybe, 'G' 'r' 'e' 'g'... ?

Heh, no, but that would be funny :)

Take the function already from the module code, it should be reusable,
if not, it would be a good idea to make it so.

thanks,

greg k-h
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