linux-kernel - Re: [RFC][PATCH 26/25] mm, arch: Convert ia64, arm, sh to generic tlb

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Message-ID: <20110126191901.GA3434@merkur.ravnborg.org>
Date:	Wed, 26 Jan 2011 20:19:33 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Avi Kivity <avi@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rik van Riel <riel@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [RFC][PATCH 26/25] mm, arch: Convert ia64, arm, sh to generic
	tlb

> Index: linux-2.6/include/asm-generic/tlb.h
> ===================================================================
> --- linux-2.6.orig/include/asm-generic/tlb.h
> +++ linux-2.6/include/asm-generic/tlb.h
> @@ -79,6 +79,10 @@ struct mmu_gather {
>  				fast_mode  : 1; /* No batching   */
>  	unsigned int		fullmm;		/* Flush full mm */
>  
> +#ifdef CONFIG_HAVE_MMU_GATHER_RANGE
> +	unsigned long		start, end;
> +#endif
> +
>  	struct mmu_gather_batch *active;
>  	struct mmu_gather_batch	local;
>  	struct page		*__pages[8];

Not related to this patch per see.

But if you anyway touch this header could you then fix
following comment:

/* Users of the generic TLB shootdown code must declare this storage space. */
DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);

If I understand this correct then this should read:

/*
 * Users of the generic TLB shootdown
 * must define mmu_gathers like this:
 * DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 */

The main difference is "declare" => "define".

If you already updated this in you serie then please ignore this mail.

	Sam
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