Re: [PATCH] silence gcc warning about possibly uninitialized use of variable in scsi_scan

[Jesper Juhl]

On 2/26/06, James Bottomley <James.Bottomley@xxxxxxxxxxxx> wrote:
> On Sun, 2006-02-26 at 16:39 +0100, Jesper Juhl wrote:
> > Gcc can't see that 'result' will always be initialized inside the for loop
> > and thus it warns
> >   drivers/scsi/scsi_scan.c:445: warning: 'result' might be used uninitialized in this function
> > This patch silences the warning by initializing 'result' to zero.
>
> Really, this is a gcc bug.  My version of the compiler:
>
> gcc version 4.0.3 20051201 (prerelease) (Debian 4.0.2-5)
>
> Doesn't give this warning.  And, since the loop has fixed parameters,
> gcc should see not only that it's always executed, but that it could be
> unrolled.
>
> Which version is causing the problem?
>
2.6.16-rc4-mm2 build with gcc 3.4.5

and I agree that gcc really should be noticing, but in fact it
doesn't. It's no big deal, I just thought we might want to shut gcc up
and give people one less warning to worry about.

--
Jesper Juhl <jesper.juhl@xxxxxxxxx>
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