Move c_src dirs back to toplevel

[bcachefs-tools-debian] / c_src / include / linux / scatterlist.h

diff --git a/c_src/include/linux/scatterlist.h b/c_src/include/linux/scatterlist.h
deleted file mode 100644 (file)
index 1e4395c..0000000
--- a/c_src/include/linux/scatterlist.h
+++ /dev/null
@@ -1,109 +0,0 @@
-#ifndef _LINUX_SCATTERLIST_H
-#define _LINUX_SCATTERLIST_H
-
-#include <linux/bug.h>
-#include <linux/slab.h>
-
-struct scatterlist {
-       unsigned long   page_link;
-       unsigned int    offset;
-       unsigned int    length;
-};
-
-#define sg_is_chain(sg)                ((sg)->page_link & 0x01)
-#define sg_is_last(sg)         ((sg)->page_link & 0x02)
-#define sg_chain_ptr(sg)       \
-       ((struct scatterlist *) ((sg)->page_link & ~0x03))
-
-static inline void sg_assign_page(struct scatterlist *sg, struct page *page)
-{
-       unsigned long page_link = sg->page_link & 0x3;
-
-       /*
-        * In order for the low bit stealing approach to work, pages
-        * must be aligned at a 32-bit boundary as a minimum.
-        */
-       BUG_ON((unsigned long) page & 0x03);
-       sg->page_link = page_link | (unsigned long) page;
-}
-
-static inline void sg_set_page(struct scatterlist *sg, struct page *page,
-                              unsigned int len, unsigned int offset)
-{
-       sg_assign_page(sg, page);
-       sg->offset = offset;
-       sg->length = len;
-}
-
-static inline struct page *sg_page(struct scatterlist *sg)
-{
-       return (struct page *)((sg)->page_link & ~0x3);
-}
-
-static inline void sg_set_buf(struct scatterlist *sg, const void *buf,
-                             unsigned int buflen)
-{
-       sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
-}
-
-static inline struct scatterlist *sg_next(struct scatterlist *sg)
-{
-       if (sg_is_last(sg))
-               return NULL;
-
-       sg++;
-       if (unlikely(sg_is_chain(sg)))
-               sg = sg_chain_ptr(sg);
-
-       return sg;
-}
-
-#define for_each_sg(sglist, sg, nr, __i)       \
-       for (__i = 0, sg = (sglist); __i < (nr); __i++, sg = sg_next(sg))
-
-static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
-                           struct scatterlist *sgl)
-{
-       /*
-        * offset and length are unused for chain entry.  Clear them.
-        */
-       prv[prv_nents - 1].offset = 0;
-       prv[prv_nents - 1].length = 0;
-
-       /*
-        * Set lowest bit to indicate a link pointer, and make sure to clear
-        * the termination bit if it happens to be set.
-        */
-       prv[prv_nents - 1].page_link = ((unsigned long) sgl | 0x01) & ~0x02;
-}
-
-static inline void sg_mark_end(struct scatterlist *sg)
-{
-       sg->page_link |= 0x02;
-       sg->page_link &= ~0x01;
-}
-
-static inline void sg_unmark_end(struct scatterlist *sg)
-{
-       sg->page_link &= ~0x02;
-}
-
-static inline void *sg_virt(struct scatterlist *sg)
-{
-       return page_address(sg_page(sg)) + sg->offset;
-}
-
-static inline void sg_init_table(struct scatterlist *sgl, unsigned int nents)
-{
-       memset(sgl, 0, sizeof(*sgl) * nents);
-       sg_mark_end(&sgl[nents - 1]);
-}
-
-static inline void sg_init_one(struct scatterlist *sg, const void *buf,
-                              unsigned int buflen)
-{
-       sg_init_table(sg, 1);
-       sg_set_buf(sg, buf, buflen);
-}
-
-#endif /* _LINUX_SCATTERLIST_H */