lkml.org 
[lkml]   [2018]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/2] CMA: remove unsupported gfp mask parameter
Date
Dear All,

The CMA related functions cma_alloc() and dma_alloc_from_contiguous()
have gfp mask parameter, but sadly they only support __GFP_NOWARN flag.
This gave their users a misleading feeling that any standard memory
allocation flags are supported, what resulted in the security issue when
caller have set __GFP_ZERO flag and expected the buffer to be cleared.

This patchset changes gfp_mask parameter to a simple boolean no_warn
argument, which covers all the underlaying code supports.

This patchset is a result of the following discussion:
https://patchwork.kernel.org/patch/10461919/

Best regards
Marek Szyprowski
Samsung R&D Institute Poland


Patch summary:

Marek Szyprowski (2):
mm/cma: remove unsupported gfp_mask parameter from cma_alloc()
dma: remove unsupported gfp_mask parameter from
dma_alloc_from_contiguous()

arch/arm/mm/dma-mapping.c | 5 +++--
arch/arm64/mm/dma-mapping.c | 4 ++--
arch/powerpc/kvm/book3s_hv_builtin.c | 2 +-
arch/xtensa/kernel/pci-dma.c | 2 +-
drivers/iommu/amd_iommu.c | 2 +-
drivers/iommu/intel-iommu.c | 3 ++-
drivers/s390/char/vmcp.c | 2 +-
drivers/staging/android/ion/ion_cma_heap.c | 2 +-
include/linux/cma.h | 2 +-
include/linux/dma-contiguous.h | 4 ++--
kernel/dma/contiguous.c | 6 +++---
kernel/dma/direct.c | 3 ++-
mm/cma.c | 8 ++++----
mm/cma_debug.c | 2 +-
14 files changed, 25 insertions(+), 22 deletions(-)

--
2.17.1

\
 
 \ /
  Last update: 2018-07-09 14:20    [W:0.016 / U:2.336 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site