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dma-debug: add Kconfig entry 

Impact: add a Kconfig entry for DMA-API debugging

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-01-09 12:14:24 +01:00
parent 0bd5c4f7c8
commit 5ee00bd469
2 changed files with 13 additions and 0 deletions
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2
arch/Kconfig
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@ -106,3 +106,5 @@ config HAVE_CLK
The <linux/clk.h> calls support software clock gating and The <linux/clk.h> calls support software clock gating and
thus are a key power management tool on many systems. thus are a key power management tool on many systems.
config HAVE_DMA_API_DEBUG
bool

11
lib/Kconfig.debug
View File

@ -902,6 +902,17 @@ config DYNAMIC_PRINTK_DEBUG
debugging for all modules. This mode can be turned off via the above debugging for all modules. This mode can be turned off via the above
disable command. disable command.
config DMA_API_DEBUG
bool "Enable debugging of DMA-API usage"
depends on HAVE_DMA_API_DEBUG
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 option causes a performance degredation. Use only if you want
to debug device drivers. If unsure, say N.
source "samples/Kconfig" source "samples/Kconfig"
source "lib/Kconfig.kgdb" source "lib/Kconfig.kgdb"