linux-kernel - Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP

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Date:	Wed, 6 Jun 2007 18:00:24 -0700 (PDT)
From:	Justin Treon <justin_treon_lkml@...oo.com>
To:	Jared Hulbert <jaredeh@...il.com>, carsteno@...ibm.com
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	richard.griffiths@...driver.com,
	Richard Griffiths <res07ml0@...izon.net>,
	Linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP

--- Jared Hulbert <jaredeh@...il.com> wrote:
> The vma->flags = 1875 = 0x753
> 
> This is:
> VM_READ
> VM_WRITE
> VM_MAYREAD
> VM_MAYEXEC
> VM_GROWSDOWN
> VM_GROWSUP
> VM_PFNMAP
> 
There was a mistake in Jared's previous post in this
thread. The vm_flags were already in hex, i.e. 0x1875

The settings were:
VM_READ
VM_EXEC
VM_MAYREAD
VM_MAYWRITE
VM_MAYEXEC
VM_DENYWRITE
VM_EXECUTABLE

A possible problem source is that VM_PFNMAP is not set. 
Thus when vm_normal_page is called there is no associated
struct page.  

Justin Treon




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