Messages in this thread | | | Date | Mon, 10 Nov 2008 15:58:08 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] serial/8250: fix uninitialized warnings |
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On Mon, 10 Nov 2008 23:48:43 +0000 Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > That's a regression in current gcc, surely? > > Oh and as a PS: Gcc is I believe right because if the loop is run zero > times then pos = NULL (ie n == NULL so the first BUG_ON fires)
Whoa. That would be clever of it.
On about half the architectures, BUG is not considered to be no-return. Dunno if that's a gcc shortcoming or if the architectures just haven't implemented it properly yet. This causes those architectures to generate quite a few warnings in generic code which don't appear on x86 (this would be one such case if your above theory is correct).
This is fairly irritating of those architectures, as I keep on going in asking "what's up" and deciding "oh, that again".
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