diff options
| author | Andy Shevchenko | 2019-02-11 18:12:30 +0200 |
|---|---|---|
| committer | Christoph Hellwig | 2019-02-13 19:11:35 +0100 |
| commit | 70ca7ba2dbe4f1858b85e30269c8408a8bb8f272 (patch) | |
| tree | 7fd4f45e8a3beb5dbfe1f6fe078b4e4286235c80 /lib | |
| parent | 0a3b192c26da198fce38e1ee242a34f558670246 (diff) | |
dma-mapping: move debug configuration options to kernel/dma
This is a follow up to the commit cf65a0f6f6ff
("dma-mapping: move all DMA mapping code to kernel/dma")
which moved source code of DMA API to kernel/dma folder. Since there is
no file left in the lib that require DMA API debugging options move the
latter to kernel/dma as well.
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index d4df5b24d75e..ef5d7c08e5b9 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1655,42 +1655,6 @@ 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 |