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From: Thomas Gleixner <tglx@linutronix.de>
To: Andi Kleen <ak@suse.de>
Cc: huang ying <huang.ying.caritas@gmail.com>,
	"Huang, Ying" <ying.huang@intel.com>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/5] x86: add executable mapping support to ioremap
Date: Thu, 31 Jan 2008 17:30:27 +0100 (CET)	[thread overview]
Message-ID: <alpine.LFD.1.00.0801311728430.9204@apollo.tec.linutronix.de> (raw)
In-Reply-To: <200801311427.38198.ak@suse.de>

On Thu, 31 Jan 2008, Andi Kleen wrote:
> > addr = ioremap(phys_addr, len);
> > set_memory_x(addr);
> > if (phys_addr < (end_pfn_mapped >> PAGE_SHIFT))
> >         set_memory_x(__va(phys_addr));
> 
> If you just need the ioremap executable there is no reason to split 
> up the direct mapping for this too. The x86 architecture does not require
> x bits to be coherent between mappings; only the caching attributes.

Thanks for pointing this out.

       tglx

  reply	other threads:[~2008-01-31 16:31 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-31  7:36 Huang, Ying
2008-01-31 13:00 ` Thomas Gleixner
2008-01-31 13:22   ` huang ying
2008-01-31 13:27     ` Andi Kleen
2008-01-31 16:30       ` Thomas Gleixner [this message]
2008-01-31 16:28     ` Thomas Gleixner
2008-01-31 16:30       ` Andi Kleen
2008-01-31 16:37         ` Thomas Gleixner
2008-01-31 16:44           ` Andi Kleen

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