linux-kernel - Re: [PATCH v4 1/2] x86/fred: Allow variable-sized event frame

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Message-ID: <20250512093033.GO4439@noisy.programming.kicks-ass.net>
Date: Mon, 12 May 2025 11:30:33 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: "Xin Li (Intel)" <xin@...or.com>
Cc: linux-kernel@...r.kernel.org, luto@...nel.org, tglx@...utronix.de,
	mingo@...nel.org, bp@...en8.de, dave.hansen@...ux.intel.com,
	x86@...nel.org, hpa@...or.com, brgerst@...il.com
Subject: Re: [PATCH v4 1/2] x86/fred: Allow variable-sized event frame

On Sun, May 11, 2025 at 11:43:52PM -0700, Xin Li (Intel) wrote:


> -#define INIT_THREAD_INFO(tsk)			\
> -{						\
> -	.flags		= 0,			\
> +extern unsigned long __top_init_kernel_stack[];
> +
> +#define INIT_THREAD_INFO(tsk)						\
> +{									\
> +	.flags		= 0,						\
> +	.user_pt_regs	= (struct pt_regs *)__top_init_kernel_stack,	\

Should that not have a -1 on or something?