LOR r262009

[Benjamin Kaduk]

On Mon, 17 Feb 2014, Dennis Glatting wrote:

> Decided to try clang 3.4 under CURRENT and got a LOR under ESXi:
>
>
> Feb 17 14:13:10 Head kernel: lock order reversal:
> Feb 17 14:13:10 Head kernel: 1st 0xfffffe00f6868548 bufwait (bufwait)
> @ /usr/src/sys/kern/vfs_bio.c:3081
> Feb 17 14:13:10 Head kernel: 2nd 0xfffff800035d3c00 dirhash (dirhash)
> @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:284

That looks like a well-known false positive, 
http://sources.zabbadoz.net/freebsd/lor.html numbr 261.

-Ben