linux-kernel - Re: [linux-usb-devel] 2.6.19-rc5: modular USB rebuilds vmlinux?

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Date:	Wed, 22 Nov 2006 10:54:54 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Andrey Borzenkov <arvidjaar@...l.ru>
Cc:	linux-usb-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [linux-usb-devel] 2.6.19-rc5: modular USB rebuilds vmlinux?

On Wed, 22 Nov 2006 21:45:55 +0300 Andrey Borzenkov wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> I was under impression that I have fully modular USB. Still:
> 
> {pts/1}% make -C ~/src/linux-git O=$HOME/build/linux-2.6.19
> make: Entering directory `/home/bor/src/linux-git'
>   GEN     /home/bor/build/linux-2.6.19/Makefile
> scripts/kconfig/conf -s arch/i386/Kconfig
>   Using /home/bor/src/linux-git as source for kernel
>   GEN     /home/bor/build/linux-2.6.19/Makefile
>   CHK     include/linux/version.h
>   CHK     include/linux/utsrelease.h
>   CHK     include/linux/compile.h
>   CC [M]  drivers/usb/core/usb.o
>   CC [M]  drivers/usb/core/hub.o
>   CC [M]  drivers/usb/core/hcd.o
>   CC [M]  drivers/usb/core/urb.o
>   CC [M]  drivers/usb/core/message.o
>   CC [M]  drivers/usb/core/driver.o
>   CC [M]  drivers/usb/core/config.o
>   CC [M]  drivers/usb/core/file.o
>   CC [M]  drivers/usb/core/buffer.o
>   CC [M]  drivers/usb/core/sysfs.o
>   CC [M]  drivers/usb/core/endpoint.o
>   CC [M]  drivers/usb/core/devio.o
>   CC [M]  drivers/usb/core/notify.o
>   CC [M]  drivers/usb/core/generic.o
>   CC [M]  drivers/usb/core/hcd-pci.o
>   CC [M]  drivers/usb/core/inode.o
>   CC [M]  drivers/usb/core/devices.o
>   LD [M]  drivers/usb/core/usbcore.o
>   CC      drivers/usb/host/pci-quirks.o
>   LD      drivers/usb/host/built-in.o
>  
> Sorry? How comes it still compiles something into main kernel?

It's just a quirk of the build machinery.
The built-in.o file should be 8 bytes or so, with nothing
really in it.

>  {pts/0}% grep USB build/linux-2.6.19/.config | grep -v '^#'
> CONFIG_USB_ARCH_HAS_HCD=y
> CONFIG_USB_ARCH_HAS_OHCI=y
> CONFIG_USB_ARCH_HAS_EHCI=y
> CONFIG_USB=m
> CONFIG_USB_DEBUG=y
> CONFIG_USB_DEVICEFS=y
> CONFIG_USB_BANDWIDTH=y
> CONFIG_USB_DYNAMIC_MINORS=y
> CONFIG_USB_SUSPEND=y
> CONFIG_USB_OHCI_HCD=m
> CONFIG_USB_OHCI_LITTLE_ENDIAN=y
> CONFIG_USB_ACM=m
> CONFIG_USB_PRINTER=m
> CONFIG_USB_STORAGE=m
> CONFIG_USB_STORAGE_DATAFAB=y
> CONFIG_USB_STORAGE_FREECOM=y
> CONFIG_USB_STORAGE_ISD200=y
> CONFIG_USB_STORAGE_DPCM=y
> CONFIG_USB_STORAGE_USBAT=y
> CONFIG_USB_STORAGE_SDDR09=y
> CONFIG_USB_STORAGE_SDDR55=y
> CONFIG_USB_STORAGE_JUMPSHOT=y
> CONFIG_USB_KBD=m
> CONFIG_USB_MOUSE=m
> CONFIG_USB_SERIAL=m
> CONFIG_USB_SERIAL_GENERIC=y
> CONFIG_USB_SERIAL_PL2303=m

---
~Randy
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