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remove <asm/scatterlist.h>

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We don't have any arch specific scatterlist now that parisc switched over
to the generic one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2015-05-01 12:46:15 +02:00
committed by Jens Axboe
parent d9cee5d4f6
commit 84be456f88
26 changed files with 56 additions and 66 deletions
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39
include/linux/scatterlist.h
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@@ -2,13 +2,39 @@
#define _LINUX_SCATTERLIST_H
#include <linux/string.h>
#include <linux/types.h>
#include <linux/bug.h>
#include <linux/mm.h>
#include <asm/types.h>
#include <asm/scatterlist.h>
#include <asm/io.h>
struct scatterlist {
#ifdef CONFIG_DEBUG_SG
unsigned long sg_magic;
#endif
unsigned long page_link;
unsigned int offset;
unsigned int length;
dma_addr_t dma_address;
#ifdef CONFIG_NEED_SG_DMA_LENGTH
unsigned int dma_length;
#endif
};
/*
* These macros should be used after a dma_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 dma_map_sg
* returns, or alternatively stop on the first sg_dma_len(sg) which
* is 0.
*/
#define sg_dma_address(sg) ((sg)->dma_address)
#ifdef CONFIG_NEED_SG_DMA_LENGTH
#define sg_dma_len(sg) ((sg)->dma_length)
#else
#define sg_dma_len(sg) ((sg)->length)
#endif
struct sg_table {
struct scatterlist *sgl; /* the list */
unsigned int nents; /* number of mapped entries */
@@ -18,10 +44,9 @@ struct sg_table {
/*
* Notes on SG table design.
*
* Architectures must provide an unsigned long page_link field in the
* scatterlist struct. We use that to place the page pointer AND encode
* information about the sg table as well. The two lower bits are reserved
* for this information.
* We use the unsigned long page_link field in the scatterlist struct to place
* the page pointer AND encode information about the sg table as well. The two
* lower bits are reserved for this information.
*
* If bit 0 is set, then the page_link contains a pointer to the next sg
* table list. Otherwise the next entry is at sg + 1.