Re: [PATCH] drivers/serial/8250.c: 'i' may be used uninitialized

From: Alan Cox
Date: Wed Oct 01 2008 - 17:37:11 EST


On Wed, 1 Oct 2008 01:47:07 -0700
Steven Noonan <steven@xxxxxxxxxxxxxx> wrote:

> serial_unlink_irq_chain() does not initialize iterator 'i', and that is
> correct logically because it is always initialized, either in the
> hlist_for_each or in the conditional immediately after (which fires if
> hlist_for_each comes up empty-handed). GCC does not realize this
> connection and emits a false warning. Annotate it with uninitialized_var().
>
> Signed-off-by: Steven Noonan <steven@xxxxxxxxxxxxxx>

Ok definitive NAK. gcc 4.3.0 can work this out and doesn't produce a
warning. Thanks for sending the patch though (and to the gcc folks for
rendering it unnecessary)

Alan
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