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SubjectRe: [PATCH 01/16] dma-debug: add Kconfig entry
On Fri, 9 Jan 2009 17:19:15 +0100 Joerg Roedel wrote:

> Impact: add a Kconfig entry for DMA-API debugging

Surely Impact: is (meant to be) different from the actual patch description... ?


> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
> ---
> arch/Kconfig | 2 ++
> lib/Kconfig.debug | 11 +++++++++++
> 2 files changed, 13 insertions(+), 0 deletions(-)
>
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 2e13aa2..068554c 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -103,3 +103,5 @@ config HAVE_CLK
> The <linux/clk.h> calls support software clock gating and
> thus are a key power management tool on many systems.
>
> +config HAVE_DMA_API_DEBUG
> + bool
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 2e75478..cba5778 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -899,6 +899,17 @@ config DYNAMIC_PRINTK_DEBUG
> debugging for all modules. This mode can be turned off via the above
> 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 "lib/Kconfig.kgdb"
> --

---
~Randy


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