panic: bufwrite: buffer is not busy???

[Eugene Grosbein]

On 31.01.2011 14:20, Julian Elischer wrote:

>> # gdb kernel
>> GNU gdb 6.1.1 [FreeBSD]
>> Copyright 2004 Free Software Foundation, Inc.
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>> This GDB was configured as "amd64-marcel-freebsd"...
>> (gdb) l *0xffffffff803c1315
>> 0xffffffff803c1315 is in ng_address_hook (/home/src/sys/netgraph/ng_base.c:3504).
>> 3499             * Quick sanity check..
>> 3500             * Since a hook holds a reference on it's node, once we know
>> 3501             * that the peer is still connected (even if invalid,) we know
>> 3502             * that the peer node is present, though maybe invalid.
>> 3503             */
>> 3504            if ((hook == NULL) ||
>> 3505                NG_HOOK_NOT_VALID(hook) ||
>> 3506                NG_HOOK_NOT_VALID(peer = NG_HOOK_PEER(hook)) ||
>> 3507                NG_NODE_NOT_VALID(peernode = NG_PEER_NODE(hook))) {
>> 3508                    NG_FREE_ITEM(item);
> 
> 
> replace with:
> 
> 3504            if ((hook == NULL) ||
> 3505                NG_HOOK_NOT_VALID(hook) ||
>                      ((peer = NG_HOOK_PEER(hook)) == NULL) ||
> 3506                NG_HOOK_NOT_VALID(peer) ||
>                      ((peernode = NG_PEER_NODE(hook)) == NULL) ||
> 3507                NG_NODE_NOT_VALID(peernode)) {
>                          if (peer)
>                                kassert((peernode != NULL), ("peer node NULL wile peer hook exists"));
> 3508                    NG_FREE_ITEM(item);
> 

It does not compile:

/home/src/sys/netgraph/ng_base.c: In function 'ng_address_hook':
/home/src/sys/netgraph/ng_base.c:3511: warning: implicit declaration of function 'kassert'
/home/src/sys/netgraph/ng_base.c:3511: warning: nested extern declaration of 'kassert'
*** Error code 1
1 error
*** Error code 2
1 error
*** Error code 2
1 error