Kernel-Module

Kernel-Module für Fedora erzeugen

Erzeugen einer Buildumgebung mit aktuellem Kernel

rpmdev-setuptree
yumdownloader --source kernel
KERNEL=$(ls kernel-*.src.rpm|tail -1)
su -c "yum-builddep $KERNEL"
rpm -Uvh $KERNEL
cd ~/rpmbuild/SPECS
rpmbuild -bp --target=$(uname -m) kernel.spec

Patch für dvbdev

Patchdatei (~/linux-3.7.1-dvb-mutex.patch)

diff -Nur linux-3.7.1/drivers/media/dvb-core/dvbdev.c linux-3.7.1/drivers/media/dvb-core/dvbdev.c
--- linux-3.7.1/drivers/media/dvb-core/dvbdev.c
+++ linux-3.7.1/drivers/media/dvb-core/dvbdev.c
@@ -83,8 +83,11 @@ static int dvb_device_open(struct inode *inode, struct file *file)
                        file->f_op = old_fops;
                        goto fail;
                }
-               if(file->f_op->open)
+               if(file->f_op->open) {
+                       mutex_unlock(&dvbdev_mutex);
                        err = file->f_op->open(inode,file);
+                       mutex_lock(&dvbdev_mutex);
+               }
                if (err) {
                        fops_put(file->f_op);
                        file->f_op = fops_get(old_fops);

Patchdatei (~/linux-3.13-dvb-mutex.patch)

--- linux-3.13/drivers/media/dvb-core/dvbdev.c  2014-03-07 00:07:50.866909615 +0100
+++ linux-3.13/drivers/media/dvb-core/dvbdev.c.orig     2014-01-20 03:40:07.000000000 +0100
@@ -81,11 +81,8 @@
                        goto fail;
                file->private_data = dvbdev;
                replace_fops(file, new_fops);
-               if (file->f_op->open) {
-                       mutex_unlock(&dvbdev_mutex);
+               if (file->f_op->open)
                        err = file->f_op->open(inode,file);
-                       mutex_lock(&dvbdev_mutex);
-               }
                up_read(&minor_rwsem);
                mutex_unlock(&dvbdev_mutex);
                return err;

Patch Einspielen

Wenn das Modul für einen neuen Kernel benötigt wird und der Kernel keine Änderungen in dvb-core hatte, kann man ab hier starten und die patch-Zeile weglassen.

KERNELDIR=$(uname -r | perl -e '<> =~ /(\d+)\.(\d+)\..*(fc\d+)/; print "kernel-$1.$2.$3\n"')
cd ~/rpmbuild/BUILD/$KERNELDIR/linux*
patch -p1 < ~/linux-3.13-dvb-mutex.patch
cd drivers/media/dvb-core
make -C /lib/modules/`uname -r`/build M=`pwd` modules
su -c "mv /usr/lib/modules/`uname -r`/kernel/drivers/media/dvb-core/dvb-core.ko /usr/lib/modules/`uname -r`/kernel/drivers/media/dvb-core/dvb-core.ko.orig"
su -c "make -C /lib/modules/`uname -r`/build M=`pwd` modules_install"

Patch aktivieren

rmmod dvb_usb_dib0700 dib8000 dib7000m dib0070 dib7000p dvb_usb budget_ci budget_core dvb_core
modprobe budget_ci
modprobe dvb_usb_dib0700

Kernelmodul für SASC

siehe SASC

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