linux-kernel - Re: [PATCH -rcu/dev] Please squash: fixup! rcu/tree: Add basic support for kfree

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Date:   Sat, 17 Aug 2019 00:43:08 -0400
From:   Joel Fernandes <joel@...lfernandes.org>
To:     Paul Walmsley <paul.walmsley@...ive.com>
Cc:     linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...ive.com>,
        "Paul E. McKenney" <paulmck@...ux.ibm.com>, rcu@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH -rcu/dev] Please squash: fixup! rcu/tree: Add basic
 support for kfree_rcu() batching

On Fri, Aug 16, 2019 at 09:38:54PM -0700, Paul Walmsley wrote:
> On Sat, 17 Aug 2019, Joel Fernandes (Google) wrote:
> 
> > xchg() on a bool is causing issues on riscv and arm32.
> 
> Indeed, it seems best not to use xchg() on any type that's not 32 bits 
> long or that's not the CPU's native word size.  Probably we should update 
> the documentation.

I would endorse any such documentation effort ;-)

> > Please squash this into the -rcu dev branch to resolve the issue.
> > 
> > Please squash this fix.
> > 
> > Fixes: -rcu dev commit 3cbd3aa7d9c7bdf ("rcu/tree: Add basic support for kfree_rcu() batching")
> > 
> > Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
> 
> Link: https://lore.kernel.org/lkml/alpine.DEB.2.21.9999.1908161931110.32497@viisi.sifive.com/T/#me9956f66cb611b95d26ae92700e1d901f46e8c59
> Reviewed-by: Paul Walmsley <paul.walmsley@...ive.com>

Thanks Paul! And nice to meet you again after many years ;-) Glad to see you
working on riscv.

thanks,

 - Joel