linux-kernel - Re: [PATCH] usb: storage: Add usb_stor

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Date:	Thu, 18 Apr 2013 10:57:12 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Joe Perches <joe@...ches.com>, Kay Sievers <kay.sievers@...y.org>
cc:	Matthew Dharm <mdharm-usb@...-eyed-alien.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb <linux-usb@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: storage: Add usb_stor_dbg, reduce object size

On Wed, 17 Apr 2013, Joe Perches wrote:

> On Wed, 2013-04-17 at 14:47 -0400, Alan Stern wrote:
> > On Wed, 17 Apr 2013, Joe Perches wrote:
> []
> > > +int usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
> > > +{
> > > +     struct va_format vaf;
> > > +     va_list args;
> > > +     int r;
> > > +
> > > +     va_start(args, fmt);
> > > +
> > > +     if (us && us->pusb_dev) {
> > > +             r = dev_vprintk_emit(7, &us->pusb_dev->dev, fmt, args);
> > 
> > Isn't there a symbolic constant you can use instead of "7"?
> 
> Nope.
> lib/dynamic_debug:__dynamic_dev_dbg() does the same thing.

This clearly is an omission in the logging API.

Kay, why doesn't the kernel have symbolic constants for the various
logging facilities and levels?

Alan Stern

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