[pvrusb2] patch for kernel 2.6.21

[Ingo Flaschberger]

Hi Mike,

> Well that is interesting, and yes I apparently misunderstood when that
> change was coming.  Obviously you found the easy fix :-)
>
> I've got a short list of minor changes to get into the driver; I'll try
> to get a new snapshot out this weekend.

something in the last release breaks with linux 2.6.15-4 kernels.

---snip---
make --directory driver
make: Entering directory `/oldroot/usr/src/pvrusb2-mci-20070428/driver'
make INSTALL_MOD_DIR=pvrusb2 -C /lib/modules/2.6.15.4/source 
M=/oldroot/usr/src/pvrusb2-mci-20070428/driver CONFIG_VIDEO_PVRUSB2=m 
CONFIG_VIDEO_PVRUSB2_24XXX=y CONFIG_VIDEO_PVRUSB2_SYSFS=y 
CONFIG_VIDEO_PVRUSB2_DEBUGIFC=y CONFIG_VIDEO_ADV_DEBUG=y modules
make[1]: Entering directory `/oldroot/usr/src/linux-2.6.15.4'
   CC [M]  /oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.o
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:100: warning: 
type defaults to `int' in declaration of `DEFINE_MUTEX'
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:100: warning: 
parameter names (without types) in function declaration
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c: In function 
`pvr2_hdw_create':
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:2501: error: 
`pvr2_unit_mtx' undeclared (first use in this function)
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:2501: error: 
(Each undeclared identifier is reported only once
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:2501: error: 
for each function it appears in.)
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c: In function 
`pvr2_hdw_destroy':
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:2613: error: 
`pvr2_unit_mtx' undeclared (first use in this function)
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c: At top level:
/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.c:100: warning: 
`DEFINE_MUTEX' declared `static' but never defined
make[2]: *** [/oldroot/usr/src/pvrusb2-mci-20070428/driver/pvrusb2-hdw.o] 
Error 1
make[1]: *** [_module_/oldroot/usr/src/pvrusb2-mci-20070428/driver] Error 
2
make[1]: Leaving directory `/oldroot/usr/src/linux-2.6.15.4'
make: *** [modules] Error 2
---snap---

pvrusb2-mci-20070407 compiles without problems.

bye,
 	Ingo