Re: [PATCH 1/7] sunrpc: remove __rcu annotation from struct gss_cl_ctx->gc_gss_ctx

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On Mon, 14 Jul 2014 16:23:53 +0200
Arnd Bergmann <arnd@xxxxxxxx> wrote:

> On Sunday 13 July 2014 21:57:38 Jeff Layton wrote:
> > 
> > Commit 5b22216e11f7 (nfs: __rcu annotations) added a __rcu annotation to
> > the gc_gss_ctx field. I see no rationale for adding that though, as that
> > field does not seem to be managed via RCU at all.
> > 
> > Cc: Arnd Bergmann <arnd@xxxxxxxx>
> > Cc: Paul McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
> 
> Unfortunately, it's been too long ago for me to remember what led to me
> adding it. I also don't see a reason for it in today's code, but I don't
> know if the code has changed, if I made a mistake then, or if it's actually
> needed for some reason I don't see.
> 

Darn, I was hoping you would remember... ;)

I don't think the code that manipulates this field has changed
substantially since then, but I'm far from certain either. This field
does live in a structure that is RCU managed, so maybe that was part of
the rationale?

In any case, we're just removing the annotation here so this shouldn't
materially harm anything, AFAICT.

-- 
Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
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