On Fri, Dec 16, 2011 at 6:24 PM, Jeff Haran <jharan@bytemobile.com> wrote:

> -----Original Message-----
> From: Javier Martinez Canillas [mailto:martinez.javier@gmail.com]
> Sent: Friday, December 16, 2011 6:04 PM
> To: Jeff Haran
> Cc: Alexandre Courbot; Jimmy Pan; Kernelnewbies@kernelnewbies.org
> Subject: Re: Is there a way to build a cross reference with kernel file
>
> On Sat, Dec 17, 2011 at 1:58 AM, Jeff Haran <jharan@bytemobile.com>
> wrote:
> >> -----Original Message-----
> >> From: kernelnewbies-bounces@kernelnewbies.org
> [mailto:kernelnewbies-
> >> bounces@kernelnewbies.org] On Behalf Of Alexandre Courbot
> >> Sent: Monday, October 24, 2011 7:05 PM
> >> To: Jimmy Pan
> >> Cc: Kernelnewbies@kernelnewbies.org
> >> Subject: Re: Is there a way to build a cross reference with kernel
> > file
> >>
> >> On Tue, Oct 25, 2011 at 12:00 AM, Jimmy Pan <dspjm1@gmail.com>
> wrote:
> >> > It seems we can use ctags, while, I don't really know how to
> > implement it.
> >> > I don't want to use the online cross reference every time...
> >>
> >> I personally use KDevelop to navigate the kernel. It's not perfect yet
> >> and a little bit tricky to configure correctly, but it's still pretty
> >> efficient and I work on improving it. I wrote about it recently:
> >> http://www.gnurou.org/code/kdevelop-kernel
> >>
> >> CTags is also known to work well, actually there is even a 'make tags'
> >> target in the kernel's Makefile.
> >>
> >> Hope this helps,
> >> Alex.
> >

...

> > Has anybody found a tool the solves this kind of problem well?
> > Specifically, given a struct foo containing a field named bar, show me
> > all of the code that references the bar field of struct foos but not the
> > bar fields of other structures nor instances of variables that are
> > themselves named bar.

It's not free, but I use Visual SlickEdit, and it is capable of doing what you want.
www.slickedit.com

I tried what you suggested, and clicked on the cb field inside the sk_buff struct and asked for all references to that. I checked through most of what it returned and they all seemed to be valid.