Re: [PATCH v19 00/15] arm64: untag user pointers passed to the kernel

2019-08-02 Thread Catalin Marinas
On Thu, Aug 01, 2019 at 08:36:47AM -0700, Dave Hansen wrote: > On 8/1/19 5:48 AM, Andrey Konovalov wrote: > > On Thu, Aug 1, 2019 at 2:11 PM Kevin Brodsky wrote: > >> On 31/07/2019 17:50, Dave Hansen wrote: > >>> On 7/23/19 10:58 AM, Andrey Konovalov wrote: > The mmap and mremap (only new_add

Re: [PATCH v19 00/15] arm64: untag user pointers passed to the kernel

2019-08-01 Thread Kevin Brodsky
On 31/07/2019 17:50, Dave Hansen wrote: On 7/23/19 10:58 AM, Andrey Konovalov wrote: The mmap and mremap (only new_addr) syscalls do not currently accept tagged addresses. Architectures may interpret the tag as a background colour for the corresponding vma. What the heck is a "background colour