linux-kernel - Re: Arm Compiler - Part 1 of Compiling Tests

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Date:	Mon, 7 Jul 2014 09:46:37 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Nick Krause <xerofoify@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Arm Compiler - Part 1 of Compiling Tests

On Mon, Jul 07, 2014 at 01:22:13AM -0400, Nick Krause wrote:
> Here are my logs of the builds attached  with warnings if they succeed
> for now failing arm configs
> according to the tests here,

fs/direct-io.c: In function ‘__blockdev_direct_IO’:
fs/direct-io.c:1011:12: warning: ‘to’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
    u = (to - from) >> blkbits;

OK, do you see why this is a false positive?  And why asking the
thousands of people "in the commmunity" to all do exactly the same
evaluation is a massive waste of time?

And why people, after doing a quick evaluation to determine that the
very first warning you sent out (which was repeated multiple times in
your log; you didn't even bother to winnow out duplicate warnings)
is a false positive, might be inclined to ignore all e-mails from
you "asking for help" in the future?

Look, it's good that you're being enthusiastic.  But you need to do
more than just send screen shots of a kernel bugzilla where it's
already been explained to you that darned few people care about the
open/closed statistics, or running builds to complain about warnings.

If you want to send a patch to clean up the warning, figure out how to
do that, and then to send the to the right people.  (Hint: reading the
Documentation/SubmittingPatches and Documentation/Submitchecklist
files.)

Regards,

						- Ted
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