Re: [PATCH v13 17/20] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get

2019-04-01 Thread Andrey Konovalov
On Mon, Mar 25, 2019 at 3:08 PM Kevin Brodsky wrote: > > On 22/03/2019 16:07, Catalin Marinas wrote: > > On Wed, Mar 20, 2019 at 03:51:31PM +0100, 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

Re: [PATCH v13 17/20] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get

2019-03-25 Thread Kevin Brodsky
On 22/03/2019 16:07, Catalin Marinas wrote: On Wed, Mar 20, 2019 at 03:51:31PM +0100, 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.

Re: [PATCH v13 17/20] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get

2019-03-22 Thread Catalin Marinas
On Wed, Mar 20, 2019 at 03:51:31PM +0100, 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. > > videobuf_dma_contig_user_get() uses

[PATCH v13 17/20] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get

2019-03-20 Thread Andrey Konovalov
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. videobuf_dma_contig_user_get() uses provided user pointers for vma lookups, which can only by done with untagged