From: Richard Knutsson <ricknu-0@student.ltu.se>
To: Dave Jones <davej@redhat.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.14 assorted warnings
Date: Fri, 28 Oct 2005 10:10:16 +0200 [thread overview]
Message-ID: <4361DCE8.1090906@student.ltu.se> (raw)
In-Reply-To: <20051028073049.GA27389@redhat.com>
Dave Jones wrote:
>gcc is dumb, it doesn't realise that the variable will be filled by another
>function if its passed thus..
>
> unsigned long foo
> bar(&foo)
> if (foo==1)
> ...
>
>With bar() filling in content of foo.
>I believe there's at least once instance of this in gcc bugzilla.
>
>
Can we blame the compiler not knowing if the function bar will use the
value of foo or initialize it?
For these cases, would it not be better to set them a value (for example
0 or maybe UNINIT_DEFAULT)?
After all, the most common warning (as far as i can see) is about
uninitialized variables.
Richard
next prev parent reply other threads:[~2005-10-28 8:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-28 7:21 2.6.14 assorted warnings Keith Owens
2005-10-28 7:28 ` Jens Axboe
2005-10-28 7:30 ` Dave Jones
2005-10-28 8:07 ` Arnd Bergmann
2005-10-28 8:29 ` Jens Axboe
2005-10-29 5:59 ` Richard Knutsson
2005-10-29 6:03 ` Al Viro
2005-10-28 8:10 ` Richard Knutsson [this message]
2005-10-30 22:15 ` Alan Cox
2005-10-30 22:25 ` Al Viro
2005-10-30 22:32 ` Al Viro
2005-10-30 22:29 ` Stephen Rothwell
2005-10-31 0:53 ` Paul Mackerras
2005-10-31 0:57 ` Al Viro
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