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Subject: Re: [PATCH 3/3] powerpc/tm: P9 disable transactionally suspended
 sigcontexts
To: Cyril Bur <cyrilbur@gmail.com>
References: <20171006074643.25269-1-cyrilbur@gmail.com>
 <20171006074643.25269-3-cyrilbur@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, mikey@neuling.org
From: Gustavo Romero <gromero@linux.vnet.ibm.com>
Date: Fri, 6 Oct 2017 08:16:02 -0300
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Hi Cyril,

On 06-10-2017 04:46, Cyril Bur wrote:
> From: Michael Neuling <mikey@neuling.org>
> 
> Unfortunately userspace can construct a sigcontext which enables
> suspend. Thus userspace can force Linux into a path where trechkpt is
> executed.
> 
> This patch blocks this from happening on POWER9 but sanity checking
> sigcontexts passed in.

I think "but" should say "by" as pointed out by Joel and acked by Mikey
previously.

Regards,
Gustavo