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Re: [Xen-devel] Mini-os fbfront.c unused variable complaint

On Mon, 2012-02-06 at 19:05 +0000, John McDermott CIV wrote:
> Xen Developers,
> FWIW, in trying to compile mini-os on Xen 4.1.2, I get a variable set
> but not used warning for variable 'message' in function init_kbdfront.
> (Looks like another one just like it, in function init_fbfront, from
> the same file.) My source won't compile with these warnings. I could
> not find a patch for this in xen-4.1-testing.hg Xenbits.

This new, enabled by default, compiler warning is very annoying, even
though it happens to be correct. Which distro has done it? (or maybe
it's just new enough gcc which is to blame).

> It looks like a conditional printk got left out after the label
> 'abort_transaction'. I don't understand fbfront.c well enough to
> suggest a patch. Its low priority for me, because I am going to stick
> some plausible code in there for now.

I think an unconditional printk including the %s and message is all
which is required here. If you've got some plausible code you may as
well post it.


> Sincerely,
> John
> ----
> What is the formal meaning of the one-line program
> #include "/dev/tty"
> J.P. McDermott                        building 12
> Code 5542                     john.mcdermott@xxxxxxxxxxxx
> Naval Research Laboratory     voice: +1 202.404.8301
> Washington, DC 20375, US      fax:   +1 202.404.7942
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