linux-kernel - Re: [PATCH v2] [x86/kvm] emulate.c: Fix comppilation warning

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Date:	Tue, 09 Jun 2015 21:17:42 -0400
From:	Bandan Das <bsd@...hat.com>
To:	Rajat Jain <rajatja@...gle.com>
Cc:	Gleb Natapov <gleb@...nel.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	rajatxjain@...il.com
Subject: Re: [PATCH v2] [x86/kvm] emulate.c: Fix comppilation warning

Rajat Jain <rajatja@...gle.com> writes:

> Fix the following warning:
>
> arch/x86/kvm/emulate.c: In function '__do_insn_fetch_bytes':
> arch/x86/kvm/emulate.c:814:47: warning: 'linear' may be used uninitialized in this function [-Wmaybe-uninitialized]
> arch/x86/kvm/emulate.c:793:16: note: 'linear' was declared here

Is this recent gcc behavior ? If yes, please mention that in the commit
message.

Please follow convention for the subject line and fix the typo -
"KVM: emulate: Fix compilation warning"

Thanks,
Bandan


> Signed-off-by: Rajat Jain <rajatja@...gle.com>
> Signed-off-by: Rajat Jain <rajatxjain@...il.com>
> ---
> v2: Fix the wrong email address.
>
>  arch/x86/kvm/emulate.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> index 630bcb0..f06e0ca 100644
> --- a/arch/x86/kvm/emulate.c
> +++ b/arch/x86/kvm/emulate.c
> @@ -790,7 +790,7 @@ static int __do_insn_fetch_bytes(struct x86_emulate_ctxt *ctxt, int op_size)
>  {
>  	int rc;
>  	unsigned size, max_size;
> -	unsigned long linear;
> +	unsigned long linear = 0;
>  	int cur_size = ctxt->fetch.end - ctxt->fetch.data;
>  	struct segmented_address addr = { .seg = VCPU_SREG_CS,
>  					   .ea = ctxt->eip + cur_size };
--
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