1 #ifndef _LINUX_SCATTERLIST_H
2 #define _LINUX_SCATTERLIST_H
4 #include <asm/scatterlist.h>
6 #include <linux/string.h>
8 static inline void sg_set_buf(struct scatterlist *sg, const void *buf,
11 sg->page = virt_to_page(buf);
12 sg->offset = offset_in_page(buf);
16 static inline void sg_init_one(struct scatterlist *sg, const void *buf,
19 memset(sg, 0, sizeof(*sg));
20 sg_set_buf(sg, buf, buflen);
23 #define sg_next(sg) ((sg) + 1)
24 #define sg_last(sg, nents) (&(sg[(nents) - 1]))
27 * Loop over each sg element, following the pointer to a new list if necessary
29 #define for_each_sg(sglist, sg, nr, __i) \
30 for (__i = 0, sg = (sglist); __i < (nr); __i++, sg = sg_next(sg))
32 #endif /* _LINUX_SCATTERLIST_H */