Re: kernel BUG at sched.c:564! (2.4.20, 2.4.21-pre5-ac3)

[Patrick McHardy <kaber@trash.net>]

Greg KH wrote:

>On Thu, Mar 27, 2003 at 01:35:27PM +0100, Patrick McHardy wrote:
>  
>
>>diff -Nru a/drivers/isdn/isdn_net.c b/drivers/isdn/isdn_net.c
>>--- a/drivers/isdn/isdn_net.c	Thu Mar 27 02:00:21 2003
>>+++ b/drivers/isdn/isdn_net.c	Thu Mar 27 02:00:21 2003
>>@@ -2831,6 +2831,7 @@
>> 
>> 			/* If binding is exclusive, try to grab the channel */
>> 			save_flags(flags);
>>+			cli();
>> 			if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
>> 				lp->l2_proto, lp->l3_proto, drvidx,
>> 				chidx, lp->msn)) < 0) {
>>    
>>
>
>I thought that cli() was being removed from the kernel, not added :)
>
>This can not build on SMP, so you might want to change it.
>  
>

this patch is for 2.4, isdn_get_free_channel is protected by cli() 
everywhere.

Patrick