Bug in vger 2.2.10 and 2.3.4 (Re: Problems with vger 2.3.3/4)

[Ryuichi Oikawa]

From: Martin Costabel <costabel at wanadoo.fr>
Subject: Bug in vger 2.2.10 and 2.3.4 (Re: Problems with vger 2.3.3/4)

> Index: arch/ppc/mm/init.c
> ===================================================================
> RCS file: /cvs/linux/linux/arch/ppc/mm/init.c,v
> retrieving revision 1.165
> retrieving revision 1.166
> diff -u -r1.165 -r1.166
> --- arch/ppc/mm/init.c  1999/05/14 22:37:29     1.165
> +++ arch/ppc/mm/init.c  1999/05/22 18:18:30     1.166
> @@ -1,5 +1,5 @@
>  /*
> - *  $Id: init.c,v 1.165 1999/05/14 22:37:29 cort Exp $
> + *  $Id: init.c,v 1.166 1999/05/22 18:18:30 cort Exp $
>   *
>   *  PowerPC version 
>   *    Copyright (C) 1995-1996 Gary Thomas (gdt at linuxppc.org)
> @@ -402,7 +402,7 @@
>     for (i = 0; i < size; i += PAGE_SIZE)
>         map_page(&init_task, v+i, p+i, flags);
>  out:
> -   return (void *) (v + (p & ~PAGE_MASK));
> +   return (void *) (v + (addr & ~PAGE_MASK));
>  }
>  
>  void iounmap(void *addr)
> 
> This patch had been proposed on May 21 by R. Oikawa and almost
> immediately been corrected, see
> http://lists.linuxppc.org/listarcs/linuxppc-user/199905/msg00680.html
> Unfortunately, the correction didn't make it into the vger tree. I don't
> know if the correction is good, but I never had problems with the
> version before the patch.
 Sorry, but please see the newer patch in msg00680.html. Simply replacing
-   return (void *) (v + (p & ~PAGE_MASK));
+   return (void *) (v + (addr & ~PAGE_MASK));
breaks iomap for BAT mapped devices(ex. mac-io/heathrow devices such as
ide, mace, bmac, etc.). Please use the newer one.


Regards,

Ryuichi Oikawa
roikawa at rr.iij4u.or.jp

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