[uml-devel] Re: [PATCH?] 2.6.15-rc1 + sf.net patches on x86 needs a patch

[Antoine Martin <antoine@nagafix.co.uk>]

On Tue, 2005-11-22 at 18:38 +0000, Antoine Martin wrote:
> This patch attached *does* make it build, but it's not right.
> The build moans at me for using the kernel headers... ok I shouldn't.
> 
>   CC      arch/um/os-Linux/aio.o
> In file included from /usr/src/linux/include/linux/aio_abi.h:30,
>                  from arch/um/os-Linux/aio.c:47:
> /usr/include/asm/byteorder.h:6:2: warning: #warning using private kernel
> header; include <endian.h> instead!
DOH DOH DOH

Founds this a few lines lower:
aio=2.4
This is used to force UML to use 2.4-style AIO even when 2.6 AIO is
available.  2.4 AIO is a single thread that handles one request at a
time, synchronously.  2.6 AIO is a thread which uses the 2.6 AIO
interface to handle an arbitrary number of pending requests.  2.6 AIO
is not available in tt mode, on 2.4 hosts, or when UML is built with
/usr/include/linux/aio_abi.h not available.  Many distributions don't
include aio_abi.h, so you will need to copy it from a kernel tree to
your /usr/include/linux in order to build an AIO-capable UML

Apologies for spamming the list for nothing, I will go and find a hole
to hide in now.

Antoine


> 
> Antoine
> 
> On Tue, 2005-11-22 at 18:31 +0000, Antoine Martin wrote:
> > Ignore that, it does not solve anything. Just delays the problem until
> > link time.
> > Anyone know why my kernel headers don't have aio_abi.h?
> > 
> > Antoine
> > 
> > On Tue, 2005-11-22 at 18:20 +0000, Antoine Martin wrote:
> > > patch attached, I've no idea what I've done really, but it builds ok now.
> > > 
> > > This time on an x86 box:
> > > 
> > > wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.14.tar.bz2
> > > wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.15-rc1.bz2
> > > wget http://user-mode-linux.sourceforge.net/work/current/2.6/2.6.15-rc1/patches.tar
> > > tar -xf patches.tar
> > > tar -jxf linux-2.6.14.tar.bz2
> > > mv linux-2.6.14 linux-2.6.15-rc1-uml
> > > cd linux-2.6.15-rc1-uml
> > > bzcat ../patch-2.6.15-rc1.bz2 | patch -p1
> > > for patch in `cat ../patches/series`; do echo $patch; patch -p1 < ../patches/$patch;  done
> > > find . -type f -size 0 -exec rm {} \;
> > > make ARCH=um defconfig
> > > make ARCH=um vmlinux
> > >   LD      arch/um/drivers/net.o
> > >   LD      arch/um/drivers/mconsole.o
> > >   LD      arch/um/drivers/ubd.o
> > >   CC      arch/um/drivers/null.o
> > >   LD      arch/um/drivers/port.o
> > >   CC      arch/um/drivers/pty.o
> > >   CC      arch/um/drivers/tty.o
> > >   CC      arch/um/drivers/cow_user.o
> > >   CC      arch/um/drivers/random.o
> > >   LD      arch/um/drivers/built-in.o
> > >   CC      arch/um/os-Linux/aio.o
> > > arch/um/os-Linux/aio.c: In function ‘init_aio_26’:
> > > arch/um/os-Linux/aio.c:402: error: ‘finish_aio_26’ undeclared (first use in this function)
> > > arch/um/os-Linux/aio.c:402: error: (Each undeclared identifier is reported only once
> > > arch/um/os-Linux/aio.c:402: error: for each function it appears in.)
> > > make[1]: *** [arch/um/os-Linux/aio.o] Error 1
> > > make: *** [arch/um/os-Linux] Error 2
> > > 
> > > Antoine



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