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

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Message-ID: <alpine.DEB.2.21.9999.1908162131490.18249@viisi.sifive.com>
Date:   Fri, 16 Aug 2019 21:38:54 -0700 (PDT)
From:   Paul Walmsley <paul.walmsley@...ive.com>
To:     "Joel Fernandes (Google)" <joel@...lfernandes.org>
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 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.

> 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>


- Paul