linux-kernel - Re: [PATCH] x86, setup: add __flush

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Date:	Fri, 26 Sep 2014 09:54:07 +0100
From:	Bryan O'Donoghue <pure.logic@...us-software.ie>
To:	Ong Boon Leong <boon.leong.ong@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [PATCH] x86, setup: add __flush_tlb() for Intel Quark X1000


> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index 41ead8d..90e0b85 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -880,6 +880,13 @@ void __init setup_arch(char **cmdline_p)
>
>   	load_cr3(swapper_pg_dir);
>   	__flush_tlb_all();
> +	/*
> +	 * Quark X1000 wrongly advertises PGE, add __flush_tlb()
> +	 * below to make sure TLB is flushed correctly in the early stage
> +	 * of setup_arch() for Quark X1000.
> +	 * X86_FEATURE_PGE flag is only setup later stage at early_cpu_init();
> +	 */
> +	__flush_tlb();
>   #else
>   	printk(KERN_INFO "Command line: %s\n", boot_command_line);
>   #endif

Sorry guys.

Just actually *read* the patch now.

If the above text works for Ingo and Henrique then it works for me too.


--
BOD


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