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

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Alan Stern wrote:

On Wed, 22 Nov 2006, Randy Dunlap wrote:


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


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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.
Not so. Randy, you missed the line for pci-quirks.o. It really is a non-trivial object file and it really goes into the main kernel.
That's because it actually is a PCI driver, living in a USB source directory. It handles the quirks needed by various PCI-based USB host controllers. 

Damm.  Thanks, Alan.

--
~Randy
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