[PATCH] access user space addresses/switch process context

[Dong, Eddie]

Do you have any interests in applying this feature to XScale architecture? 
The xscale patch is under KDB4.0 folder.

> -----Original Message-----
> From: Vamsi Krishna S . [mailto:vamsi at in.ibm.com]
> Sent: 2003年4月16日 22:08
> To: Keith Owens
> Cc: kdb
> Subject: Re: [PATCH] access user space addresses/switch 
> process context
> 
> 
> On Wed, Apr 16, 2003 at 11:11:25PM +1000, Keith Owens wrote:
> > On Wed, 16 Apr 2003 23:01:19 +1000, 
> > Keith Owens <kaos at sgi.com> wrote:
> > >On Wed, 16 Apr 2003 17:31:33 +0530, 
> > >"Vamsi Krishna S ." <vamsi at in.ibm.com> wrote:
> > >>diff -urN -X /home/vamsi/.dontdiff 
> 2420-kdb4.1-pure/kdb/kdbsupport.c 2420-kdb4.1/kdb/kdbsupport.c
> > >>--- 2420-kdb4.1-pure/kdb/kdbsupport.c	2003-04-16 
> 11:38:14.000000000 +0530
> > >>+++ 2420-kdb4.1/kdb/kdbsupport.c	2003-04-16 
> 12:56:42.000000000 +0530
> > >>+/*
> > >>+ * from mm/memory.c, adapted to run without any locks to 
> work within kdb
> > >>+ */
> > >>+static struct page * kdb_follow_page(struct mm_struct 
> *mm, unsigned long address, int write) 
> > >
> > >AFAICT this function is identical to follow_page().  Instead of
> > >duplicating that code and possibly getting out of sync 
> with the real
> > >follow_page(), change follow_page() so it is extern for 
> CONFIG_KDB=y,
> > >otherwise it is static.
> > 
> > Sorry for the scattered mails, things are a bit hectic at 
> the moment.
> > 
> No problems. Thanks for taking the time to look into it :-)
> 
> > Forget about making follow_page() extern.  Instead add
> > kdb_get_one_user_page to the end of mm/memory.c so it can access the
> > private mm data and functions.
> > 
> Ok.. will do.
> 
> > Also kdb_getuserarea_size() needs to be exported, any 
> module that does
> > kdb_getarea() will end up with a call to kdb_getuserarea_size().
> > 
> Right. I will export it.
> 
> -- 
> Vamsi Krishna S.
> Linux Technology Center,
> IBM Software Lab, Bangalore.
> Ph: +91 80 5044959
> Internet: vamsi at in.ibm.com
> 
>