[parisc-linux] a pretty big change

[John David Anglin]

> So I thought 0xc004a078 is in get_unused_buffer_head
> which is in fs/buffer.c.

I think the bug you are seeing is due to the inline definition for
xchg in asm/system.h.  The problem occurs in exchanges with 0 when
the address used in the ldcws instruction is not aligned on a 16 byte
boundary.  Change the define for xchg to just use the spinlock method
in all cases.

The other option is to align all the addresses that are used in xchg's
with 0.

Dave
-- 
J. David Anglin                                  dave.anglin at nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)

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Date: Thu, 11 Mar 1999 10:40:18 +1100 (EDT)
To: hppa-linux at thepuffingroup.com
Subject: Re: [hppa-linux] Bootstrap #3 successful
Organization: TUSC Computer Systems, Doncaster, Australia
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>>>>> Jason Eckhardt <jason at equator.com> alleges:

 JE> I'm happy to report that bootstrap #3 passed for everyone who reported
 JE> back thus far, thanks for taking the time to help out. Network, disk, and
 JE> even ZIP drive boots worked. I'd like to see a CD-ROM test if someone has
 JE> a CDR drive available.

  JE>  1) 780/C160       (disk)
  JE>  2) 715/64         (BOOTP)
  JE>  3) 816/E35        (disk)
  JE>  4) 712/100        (disk)
  JE>  5) 712/100        (SCSI ZIP drive!)
  JE>  6) 715/33         (RBOOTD) 
  JE>  7) 715/80         (?disk?)

Hi,

I have also just tested it on a 887/G50 and a 827S, both from scratch SCSI
disks. Everything went perfectly.

Well done
David
-- 
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