[RFC] kernel.spec: reverse dependency logic for moving packages between kernel and kernel-modules-extra

[John W. Linville]

The logic to process mod-extra.list finds modules that depend on
the modules in that list and includes those in kernel-module-extra
as well.  This logic is broken, because it does not account for
multi-layer dependency chains.  Specifically, if a module depends
on another module, and only the second one depends on something in
mod-extra.list, then only the second would get moved.  This leaves the
first module in the kernel package, resulting in WARNING messages
when the kernel rpm is installed:

Preparing...                ########################################### [100%]
   1:kernel                 ########################################### [100%]
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/scsi/bnx2fc/bnx2fc.ko needs unknown symbol cnic_register_driver
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/scsi/bnx2fc/bnx2fc.ko needs unknown symbol cnic_unregister_driver
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/scsi/bnx2i/bnx2i.ko needs unknown symbol cnic_register_driver
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/scsi/bnx2i/bnx2i.ko needs unknown symbol cnic_unregister_driver
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/wusbcore/wusb-wa.ko needs unknown symbol wusbhc_reset_all
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/wusbcore/wusb-wa.ko needs unknown symbol wusbhc_handle_dn
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/wusbcore/wusb-wa.ko needs unknown symbol wusbd
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/wusbcore/wusb-wa.ko needs unknown symbol __wusb_dev_get_by_usb_dev
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/wusbcore/wusb-wa.ko needs unknown symbol wusbhc_giveback_urb
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/wusbcore/wusb-wa.ko needs unknown symbol wusb_dev_destroy
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/atm/xusbatm.ko needs unknown symbol usbatm_usb_disconnect
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/drivers/usb/atm/xusbatm.ko needs unknown symbol usbatm_usb_probe
WARNING: /lib/modules/3.2.0-0.rc3.git1.2.fc14.x86_64/kernel/net/bridge/netfilter/ebtable_broute.ko needs unknown symbol br_should_route_hook

This patch reverses that logic, so that anything in kernel with
a dependency on something in mod-extra.list will cause the module
in mod-extra.list to be treated as if it was _not_ in that list.
This prevents the WARNING lines above.

Signed-off-by: John W. Linville <linville at tuxdriver.com>
---
I don't think I'm very fond of the kernel-modules-extra package.
But if it is going to be around, it needs to process the dependencies
in a way that doesn't require both modules to be installed all the
time. :-)

diff --git a/kernel.spec b/kernel.spec
index e1cf978..136d50f 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -1661,6 +1662,7 @@ BuildKernel() {
     # Look through all of the modules, and throw any that have a dependency in
     # our list into the list as well.
     rm -rf dep.list dep2.list
+    rm -rf req.list req2.list
     cp %{SOURCE16} .
     for dep in `cat modnames`
     do
@@ -1673,12 +1675,16 @@ BuildKernel() {
         then
           continue
         else
-          echo $dep >> dep.list
+          echo $mod.ko >> req.list
         fi
       done
     done
 
-    for mod in `cat mod-extra.list`
+    sort -u req.list > req2.list
+    sort -u mod-extra.list > mod-extra2.list
+    join -v 1 mod-extra2.list req2.list > mod-extra3.list
+
+    for mod in `cat mod-extra3.list`
     do
       # get the path for the module
       modpath=`grep /$mod modnames`
@@ -1696,7 +1702,8 @@ BuildKernel() {
       mv $mod $newpath
     done
 
-    rm modnames mod-extra.list dep.list dep2.list
+    rm modnames dep.list dep2.list req.list req2.list
+    rm mod-extra.list mod-extra2.list mod-extra3.list
     popd
 
     # remove files that will be auto generated by depmod at rpm -i time
-- 
John W. Linville		The water won't run clean until you get
linville at redhat.com			the pigs out of the creek.