[POWERPC 09/18] Remove the global dma_direct_offset

[Benjamin Herrenschmidt]

On Tue, 2007-12-18 at 18:49 +0100, arnd at arndb.de wrote:
> plain text document attachment
> (0019-Remove-the-global-dma_direct_offset.patch)
> We no longer need the global dma_direct_offset, update the comment to
> reflect the new reality.
> 
> Signed-off-by: Michael Ellerman <michael at ellerman.id.au>
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> ---

Ack.

>  arch/powerpc/kernel/dma_64.c      |    7 ++++---
>  include/asm-powerpc/dma-mapping.h |    2 --
>  2 files changed, 4 insertions(+), 5 deletions(-)
> 
> Index: linux-2.6-new/arch/powerpc/kernel/dma_64.c
> ===================================================================
> --- linux-2.6-new.orig/arch/powerpc/kernel/dma_64.c
> +++ linux-2.6-new/arch/powerpc/kernel/dma_64.c
> @@ -112,10 +112,11 @@ EXPORT_SYMBOL(dma_iommu_ops);
>  /*
>   * Generic direct DMA implementation
>   *
> - * This implementation supports a global offset that can be applied if
> - * the address at which memory is visible to devices is not 0.
> + * This implementation supports a per-device offset that can be applied if
> + * the address at which memory is visible to devices is not 0. Platform code
> + * can point archdata.dma_data at an unsigned long holding the offset. By
> + * default no offset is used.
>   */
> -unsigned long dma_direct_offset;
>  
>  static unsigned long get_dma_direct_offset(struct device *dev)
>  {
> Index: linux-2.6-new/include/asm-powerpc/dma-mapping.h
> ===================================================================
> --- linux-2.6-new.orig/include/asm-powerpc/dma-mapping.h
> +++ linux-2.6-new/include/asm-powerpc/dma-mapping.h
> @@ -186,8 +186,6 @@ static inline void dma_unmap_sg(struct d
>  extern struct dma_mapping_ops dma_iommu_ops;
>  extern struct dma_mapping_ops dma_direct_ops;
>  
> -extern unsigned long dma_direct_offset;
> -
>  #else /* CONFIG_PPC64 */
>  
>  #define dma_supported(dev, mask)	(1)
>