linux-kernel - Re: [PATCH 10/16] memblock tests: Add skeleton of the memblock simulator

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Message-ID: <YfPrgGpfi+ZqaBz/@casper.infradead.org>
Date:   Fri, 28 Jan 2022 13:11:28 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Karolina Drobnik <karolinadrobnik@...il.com>
Cc:     linux-mm@...ck.org, akpm@...ux-foundation.org,
        mike.rapoport@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/16] memblock tests: Add skeleton of the memblock
 simulator

On Fri, Jan 28, 2022 at 12:25:55PM +0100, Karolina Drobnik wrote:
> On Thu, 2022-01-27 at 14:06 +0000, Matthew Wilcox wrote:
> > On Thu, Jan 27, 2022 at 02:21:28PM +0100, Karolina Drobnik wrote:
> > > +# Memblock simulator requires AddressSanitizer (libasan) and
> > > liburcu libraries
> > 
> > Stale comment?  You don't seem to actually use liburcu.
> 
> I'm using uatomic_inc and uatomic_dec in tools/lib/slab.c. But, you're
> right, memblock simulator doesn't use liburcu per se but uses code that
> requires it. I wasn't sure where and how to communicate it, so I added
> this comment here.

I thought the comment was stale because you don't link against liburcu.
Maybe you can use uatomic_inc() without adding -lurcu to the link step.