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Date: Mon, 14 Aug 2017 21:00:57 +1000 From: Michael Ellerman <mpe@...erman.id.au> To: Nicholas Piggin <npiggin@...il.com> Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, mikey@...ling.org, stewart@...ux.vnet.ibm.com, apopple@....ibm.com, hbabu@...ibm.com, oohall@...il.com, linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v6 01/17] powerpc/vas: Define macros, register fields and structures Nicholas Piggin <npiggin@...il.com> writes: > On Mon, 14 Aug 2017 15:21:48 +1000 > Michael Ellerman <mpe@...erman.id.au> wrote: > >> Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com> writes: > >> > arch/powerpc/include/asm/vas.h | 35 ++++ >> > arch/powerpc/include/uapi/asm/vas.h | 25 +++ >> >> I thought we weren't exposing VAS to userspace yet? >> >> If we are then we need to get things straight WRT copy/paste abort. > > No we should not be. This might be just a leftover hunk that should > be moved to a future series. > > At the moment (as far as I understand) it should be limited to > preempt-disabled, process context, kernel users which avoids any > concern for switch_to. I think that comment applied to a previous version, see patch 16. cheers
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