Re: witness and modules.

From: Warner Losh <imp_at_bsdimp.com> Date: Tue, 2 Dec 2014 09:24:25 -0700 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:54 UTC

> On Dec 1, 2014, at 10:08 PM, Julian Elischer <julian_at_freebsd.org> wrote:
> 
> On 12/1/14, 11:39 PM, John Baldwin wrote:
>> On Friday, November 28, 2014 11:08:35 PM Julian Elischer wrote:
>>> Do we need to compile all modules with witness definitions when
>>> linking with a kernel compiled with witness?
>>> This was true at one stage but I remember some work was done to make
>>> them compatible.
>> You should not need this.  modules always call functions in the kernel for
>> lock operations and this functions are what invoke WITNESS.
>> 
> that's what I thought but empirical evidence disagrees.
> I'll try some more cases.

I swap back and forth all the time between the two. Kernel modules don’t
change when you compile them with WITNESS or without.

Warner