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frv: use asm-generic/scatterlist.h
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Signed-off-by: FUJITA Tomonori <[email protected]>
Cc: David Howells <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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fujita authored and torvalds committed May 27, 2010
1 parent 459d42b commit 3e6e3da
Showing 1 changed file with 1 addition and 39 deletions.
40 changes: 1 addition & 39 deletions arch/frv/include/asm/scatterlist.h
Original file line number Diff line number Diff line change
@@ -1,45 +1,7 @@
#ifndef _ASM_SCATTERLIST_H
#define _ASM_SCATTERLIST_H

#include <asm/types.h>

/*
* Drivers must set either ->address or (preferred) page and ->offset
* to indicate where data must be transferred to/from.
*
* Using page is recommended since it handles highmem data as well as
* low mem. ->address is restricted to data which has a virtual mapping, and
* it will go away in the future. Updating to page can be automated very
* easily -- something like
*
* sg->address = some_ptr;
*
* can be rewritten as
*
* sg_set_buf(sg, some_ptr, length);
*
* and that's it. There's no excuse for not highmem enabling YOUR driver. /jens
*/
struct scatterlist {
#ifdef CONFIG_DEBUG_SG
unsigned long sg_magic;
#endif
unsigned long page_link;
unsigned int offset; /* for highmem, page offset */

dma_addr_t dma_address;
unsigned int length;
};

/*
* These macros should be used after a pci_map_sg call has been done
* to get bus addresses of each of the SG entries and their lengths.
* You should only work with the number of sg entries pci_map_sg
* returns, or alternatively stop on the first sg_dma_len(sg) which
* is 0.
*/
#define sg_dma_address(sg) ((sg)->dma_address)
#define sg_dma_len(sg) ((sg)->length)
#include <asm-generic/scatterlist.h>

#define ISA_DMA_THRESHOLD (0xffffffffUL)

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