Re: [PATCH] 8250: Eliminate compile warning of 8250.c
From: Sheng Yang
Date: Tue Nov 25 2008 - 05:55:39 EST
On Tuesday 25 November 2008 18:43:34 Alan Cox wrote:
> > Can't understand initializing got "risk hiding future ones". As I know,
> > didn't
>
> Because if you set it to NULL and later delete a line which does the
> intended assignment you will no longer get a warning.
>
> > think BUG_ON(n==null) cover this. And I don't think leave it to compiler
> > is more proper here.
>
> The BUG_ON covers it, the current gcc gets this right and works it out.
>
> NAK again
The logic here is strange...
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.
If you used new compiler, you wouldn't get a warning, and you think this time
the compiler get it right.
So, what result did you expect? A warning to notice that we didn't delete a
intended assignment, or a "right" result?
OK. if you worry about "delete a line which does the intended assignment", the
updated version with BUG_ON(i == NULL) can help.
--
regards
Yang, Sheng
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