Re: [PATCH] apm_event{,info}_t are userspace types.

[Eamon Walsh <ewalsh@tycho.nsa.gov>]

Andrew Morton wrote:
> On Fri, 30 Nov 2007 15:02:43 -0500 Adam Jackson <ajax@redhat.com> wrote:
>
> > These types define the size of data read from /dev/apm_bios.  They
> > should not be hidden behind #ifdef __KERNEL__.
>
> Missing info: what are the consequences of this fix?  What id broken when
> it it not applied?

This is killing my xserver compile, apm_event_t is used in the xserver 
source.  The commit that introduced the problem is:

commit ee8e7cfe9d330d6f1ce0b9b1620d6df5d9cf6b70
Author: Rusty Russell <rusty@rustcorp.com.au>
Date:   Mon Oct 22 10:56:19 2007 +1000

    Make asm-x86/bootparam.h includable from userspace.

    To actually write a bootloader (or, say, the lguest launcher)
    currently requires duplication of these structures.  Making them
    includable from userspace is much nicer.

    We merge the common userspace-required definitions of e820_32/64.h
    into e820.h for export.

    Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

> > ---
> >  include/linux/apm_bios.h |    6 +++---
> >  1 files changed, 3 insertions(+), 3 deletions(-)
>
> Please include Signed-off-by:, as per Documentation/SubmittingPatches,
> thanks.
>
> > diff --git a/include/linux/apm_bios.h b/include/linux/apm_bios.h
> > index 9754baa..01a6244 100644
> > --- a/include/linux/apm_bios.h
> > +++ b/include/linux/apm_bios.h
> > @@ -18,6 +18,9 @@
> >  
> >  #include <linux/types.h>
> >  
> > +typedef unsigned short	apm_event_t;
> > +typedef unsigned short	apm_eventinfo_t;
> > +
> >  struct apm_bios_info {
> >  	__u16	version;
> >  	__u16	cseg;
> > @@ -32,9 +35,6 @@ struct apm_bios_info {
> >  
> >  #ifdef __KERNEL__
> >  
> > -typedef unsigned short	apm_event_t;
> > -typedef unsigned short	apm_eventinfo_t;
> > -
> >  #define APM_CS		(GDT_ENTRY_APMBIOS_BASE * 8)
> >  #define APM_CS_16	(APM_CS + 8)
> >  #define APM_DS		(APM_CS_16 + 8)
>
> --
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--
Eamon Walsh <ewalsh@tycho.nsa.gov>
National Security Agency
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