omapdrm broken on v4.5-rc1, bisected to "mm, dax, gpu: convert vm_insert_mixed to pfn_t"

[Dan Williams]

On Tue, Jan 26, 2016 at 12:24 AM, Tomi Valkeinen <tomi.valkeinen at ti.com> 
wrote:
> Hi Dan,
>
> omapdrm crashes on v4.5-rc1, and I bisected the problem to:
>
> 01c8f1c44b83a0825b573e7c723b033cece37b86 ("mm, dax, gpu: convert 
> vm_insert_mixed to pfn_t").
>
> Below is the crash dump. Any ideas?

Thanks for this.  I think I see the problem in vm_insert_mixed(), I'll
send a fix to test shortly.