Re: [PATCH v15 13/17] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr()

On Mon, May 06, 2019 at 06:30:59PM +0200, Andrey Konovalov wrote:

This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments.

ib_uverbs_(re)reg_mr() use provided user pointers for vma lookups (through e.g. mlx4_get_umem_mr()), which can only by done with untagged pointers.

Untag user pointers in these functions.

Signed-off-by: Andrey Konovalov andreyknvl@google.com

drivers/infiniband/core/uverbs_cmd.c | 4 ++++ 1 file changed, 4 insertions(+)

I think this is OK.. We should really get it tested though.. Leon?

Jason