linux-kernel - Re: [PATCH v9 2/3] kernel.h: add to_user

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Message-ID: <CAF6AEGuaLLx1iEeDyfc3WNunp6md-OjBothY8Fw_FMo0eGoP3Q@mail.gmail.com>
Date:	Thu, 17 Mar 2016 17:25:49 -0400
From:	Rob Clark <robdclark@...il.com>
To:	Gustavo Padovan <gustavo@...ovan.org>,
	Joe Perches <joe@...ches.com>, Rob Clark <robdclark@...il.com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	devel@...verdev.osuosl.org,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	Daniel Stone <daniels@...labora.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Riley Andrews <riandrews@...roid.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Greg Hackmann <ghackmann@...gle.com>,
	John Harrison <John.C.Harrison@...el.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...el.com>,
	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v9 2/3] kernel.h: add to_user_ptr()

On Thu, Mar 17, 2016 at 5:19 PM, Gustavo Padovan <gustavo@...ovan.org> wrote:
> 2016-03-17 Joe Perches <joe@...ches.com>:
>
>> On Thu, 2016-03-17 at 16:50 -0400, Rob Clark wrote:
>> > On Thu, Mar 17, 2016 at 4:40 PM, Joe Perches <joe@...ches.com> wrote:
>> []
>> > > It's a name that seems like it should be a straightforward
>> > > cast of a kernel pointer to a __user pointer like:
>> > >
>> > > static inline void __user *to_user_ptr(void *p)
>> > > {
>> > >         return (void __user *)p;
>> > > }
>> > ahh, ok.  I guess I was used to using it in the context of ioctl
>> > structs..  in that context u64 -> (void __user *) made more sense.
>> >
>> > Maybe uapi_to_ptr()?  (ok, not super-creative.. maybe someone has a
>> > better idea)
>>
>> Maybe u64_to_user_ptr?
>
> That is a good name. If everyone agrees I can resend this patch
> changing it to u64_to_user_ptr. Then should we still keep it on
> kernel.h?


works for me

BR,
-R