Re: [PATCH v18 11/15] IB/mlx4: untag user pointers in mlx4_get_umem_mr

On Mon, Jun 24, 2019 at 04:32:56PM +0200, Andrey Konovalov wrote:

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

mlx4_get_umem_mr() uses provided user pointers for vma lookups, which can only by done with untagged pointers.

Untag user pointers in this function.

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

drivers/infiniband/hw/mlx4/mr.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)

Acked-by: Catalin Marinas catalin.marinas@arm.com

This patch also needs an ack from the infiniband maintainers (Jason).