2016-03-17 Joe Perches [off-list ref]:

On Thu, 2016-03-17 at 18:19 -0300, Gustavo Padovan wrote:

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2016-03-17 Joe Perches [off-list ref]:

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On Thu, 2016-03-17 at 16:50 -0400, Rob Clark wrote:

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On Thu, Mar 17, 2016 at 4:40 PM, Joe Perches [off-list ref] wrot=

e:

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[]

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It's a name that seems like it should be a straightforward
cast of a kernel pointer to a __user pointer like:
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static inline void __user *to_user_ptr(void *p)
{
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0return (void __us=

er *)p;

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}

ahh, ok.=C2=A0=C2=A0I guess I was used to using it in the context o=

f ioctl

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structs..=C2=A0=C2=A0in that context u64 -> (void __user *) made mo=

re sense.

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Maybe uapi_to_ptr()?=C2=A0=C2=A0(ok, not super-creative.. maybe som=

eone has a

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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?

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I've no particular opinion about location,
but maybe compat.h might be appropriate.

I don't think this is really related to compat. I'd keep kernel.h.

The problem I'm trying to solve here is:

CC      drivers/dma-buf/sync_file.o
drivers/dma-buf/sync_file.c: In function =E2=80=98sync_file_ioctl_fence_inf=
o=E2=80=99:
drivers/dma-buf/sync_file.c:341:19: warning: cast to pointer from
integer of different size [-Wint-to-pointer-cast]
  if (copy_to_user((void __user *)info.sync_fence_info, fence_info,

where info.sync_fence_info is __u64.

	Gustavo