linux-kernel - Re: [PATCH]io_apic.c: fix compile warning

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Message-Id: <1245249322.4870.19.camel@subratamodak.linux.ibm.com>
Date:	Wed, 17 Jun 2009 20:05:22 +0530
From:	Subrata Modak <subrata@...ux.vnet.ibm.com>
To:	"Figo.zhang" <figo1802@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH]io_apic.c: fix compile warning

> On Wed, 17 Jun 2009 22:25:20 +0800
> "Figo.zhang" <figo1802@...il.com> wrote:
> 
> > fix compile warning:
> > arch/x86/kernel/apic/io_apic.c: In function ‘ioapic_write_entry’:
> > arch/x86/kernel/apic/io_apic.c:466: warning: ‘eu’ is used uninitialized in this function
> > arch/x86/kernel/apic/io_apic.c:465: note: ‘eu’ was declared here
> 
> What compiler are you using. Current gcc correctly notices that there are
> no uninitialized things to worry about ?

Even 4.4.0 and above reports this warning. Last time i remember it
generated somewhere around 70 such warnings. And, then you need to dig
down whether any of them will really introduce bug(s). Else, leave as it
is. It is more of a gcc problem rather than kernel.

Regards--
Subrata


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