Merge tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping

Pull DMA mapping updates from Christoph Hellwig:

 - add debugfs support for dumping dma-debug information (Corentin
   Labbe)

 - Kconfig cleanups (Andy Shevchenko and me)

 - debugfs cleanups (Greg Kroah-Hartman)

 - improve dma_map_resource and use it in the media code

 - arch_setup_dma_ops / arch_teardown_dma_ops cleanups

 - various small cleanups and improvements for the per-device coherent
   allocator

 - make the DMA mask an upper bound and don't fail "too large" dma mask
   in the remaning two architectures - this will allow big driver
   cleanups in the following merge windows

* tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping: (21 commits)
  Documentation/DMA-API-HOWTO: update dma_mask sections
  sparc64/pci_sun4v: allow large DMA masks
  sparc64/iommu: allow large DMA masks
  sparc64: refactor the ali DMA quirk
  ccio: allow large DMA masks
  dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag
  dma-mapping: remove dma_mark_declared_memory_occupied
  dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig
  dma-mapping: improve selection of dma_declare_coherent availability
  dma-mapping: remove an incorrect __iommem annotation
  of: select OF_RESERVED_MEM automatically
  device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT
  mfd/sm501: depend on HAS_DMA
  dma-mapping: add a kconfig symbol for arch_teardown_dma_ops availability
  dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability
  dma-mapping: move debug configuration options to kernel/dma
  dma-debug: add dumping facility via debugfs
  dma: debug: no need to check return value of debugfs_create functions
  videobuf2: replace a layering violation with dma_map_resource
  dma-mapping: don't BUG when calling dma_map_resource on RAM
  ...

1 files changed, 0 insertions, 36 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 91ed81250fb3..bd62be80228e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1654,42 +1654,6 @@ config PROVIDE_OHCI1394_DMA_INIT
 
           See Documentation/debugging-via-ohci1394.txt for more information.
 
-config DMA_API_DEBUG
-        bool "Enable debugging of DMA-API usage"
-        select NEED_DMA_MAP_STATE
-        help
-          Enable this option to debug the use of the DMA API by device drivers.
-          With this option you will be able to detect common bugs in device
-          drivers like double-freeing of DMA mappings or freeing mappings that
-          were never allocated.
-
-          This also attempts to catch cases where a page owned by DMA is
-          accessed by the cpu in a way that could cause data corruption.  For
-          example, this enables cow_user_page() to check that the source page is
-          not undergoing DMA.
-
-          This option causes a performance degradation.  Use only if you want to
-          debug device drivers and dma interactions.
-
-          If unsure, say N.
-
-config DMA_API_DEBUG_SG
-        bool "Debug DMA scatter-gather usage"
-        default y
-        depends on DMA_API_DEBUG
-        help
-          Perform extra checking that callers of dma_map_sg() have respected the
-          appropriate segment length/boundary limits for the given device when
-          preparing DMA scatterlists.
-
-          This is particularly likely to have been overlooked in cases where the
-          dma_map_sg() API is used for general bulk mapping of pages rather than
-          preparing literal scatter-gather descriptors, where there is a risk of
-          unexpected behaviour from DMA API implementations if the scatterlist
-          is technically out-of-spec.
-
-          If unsure, say N.
-
 menuconfig RUNTIME_TESTING_MENU
         bool "Runtime Testing"
         def_bool y