linux-kernel - Re: [PATCH 2/7] paravirtualization: Patch inline replacements for common paravirt operations.

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Message-Id: <20061101152715.f1f94d5c.akpm@osdl.org>
Date:	Wed, 1 Nov 2006 15:27:15 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Andi Kleen <ak@....de>, Andi Kleen <ak@...e.de>,
	virtualization@...ts.osdl.org, Chris Wright <chrisw@...s-sol.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7] paravirtualization: Patch inline replacements for
 common paravirt operations.

On Wed, 01 Nov 2006 21:28:13 +1100
Rusty Russell <rusty@...tcorp.com.au> wrote:

> +void apply_paravirt(struct paravirt_patch *start, struct paravirt_patch *end)
> +{
> +	struct paravirt_patch *p;
> +	int i;
> +
> +	for (p = start; p < end; p++) {
> +		unsigned int used;
> +
> +		used = paravirt_ops.patch(p->instrtype, p->clobbers, p->instr,
> +					  p->len);
> +#ifdef CONFIG_DEBUG_KERNEL
> +		/* Deliberately clobber regs using "not %reg" to find bugs. */

That would be considered to be abusive of CONFIG_DEBUG_KERNEL.  A
CONFIG_DEBUG_PARAVIRT which depends on CONFIG_DEBUG_KERNEL would be more
harmonious.
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