linux-kernel - Re: [PATCH] 8250: Eliminate compile warning of 8250.c

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Date:	Tue, 25 Nov 2008 19:32:07 +0800
From:	Sheng Yang <sheng@...ux.intel.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH] 8250: Eliminate compile warning of 8250.c

On Tuesday 25 November 2008 19:13:42 Alan Cox wrote:
> > The logic here is strange...
>
> Why
>
> > If you used old compiler, you would get a warning, and you thought that's
> > ensured we won't delete a intended assignment by mistake.
>
> No.. if you hid the warning by hacking around the compiler mistake with
> extra bogus assignments you would hide a future mistake.

OK, I got it now. 

Comparing the result of deleting a meaningful line, this modification result in 
no more warning.  And you also think one additional BUG_ON just for fixing 
compiler's mistake, so it's unacceptable. 

So leave the patch as it was. Seems many people need to upgrade compiler to 
avoid this thing. :)

-- 
regards
Yang, Sheng

>
> > If you used new compiler, you wouldn't get a warning, and you think this
> > time the compiler get it right.
>
> The compiler does now get it right - I checked.
>
> Alan

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