[parisc-linux] ret_from_kernel_thread incomplete

[Richard Hirst]

Hi,
  Some scsi drivers create a kernel thread for error handling.  If
such a driver is build as a module, then when the module is unloaded
you get something like:

10:~# rmmod lasi7xx_mod
break 0,0: pid=100 command='scsi_eh_0'
scsi_eh_0[100]: Breakpoint 0

PSW  : 0004010b  GR 1 : c022c000  GR 2 : c0104c48  GR 3 : c7834000  
GR 4 : c7f241c0  GR 5 : c7f241c0  GR 6 : c7968000  GR 7 : c7834840  
GR 8 : c7834694  GR 9 : 00000000  GR10 : c8815000  GR11 : c8815000  
GR12 : c880d000  GR13 : c7825000  GR14 : c7834548  GR15 : 00000001  
GR16 : 000927f8  GR17 : 00000001  GR18 : 20020128  GR19 : 00000001  
GR20 : 00000020  GR21 : c022c264  GR22 : 0000001a  GR23 : c7968000  
GR24 : 0000000a  GR25 : c7834758  GR26 : c78346a4  GR27 : c0218000  
GR28 : c7834000  GR29 : c783469c  GR30 : c7968740  GR31 : 00000002  
SR0  : 00000000  SR1  : 00002002  SR2  : 00000000  SR3  : 00002002  
SR4  : 00000000  SR5  : 00000000  SR6  : 00000000  SR7  : 00000000  

IASQ : 00000000 00000000 IAOQ : c0104c48 c0104c4c ORIG_R28 : c7f241c0
 IIR : 00000000 ISR : 00000000 IOR : c79685ac

scsi : 0 hosts.
10:~# 

c0104c48 corresponds to

        .word   0       /* FIXME */

round about line 521 of arch/parisc/kernel/entry.S

Richard