First step to being able to change the scatterlist setup without
having to modify drivers (a lot :-)
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
sg_set_buf(sg, buf, buflen);
}
+#define sg_next(sg) ((sg) + 1)
+#define sg_last(sg, nents) (&(sg[(nents) - 1]))
+
+/*
+ * Loop over each sg element, following the pointer to a new list if necessary
+ */
+#define for_each_sg(sglist, sg, nr, __i) \
+ for (__i = 0, sg = (sglist); __i < (nr); __i++, sg = sg_next(sg))
+
#endif /* _LINUX_SCATTERLIST_H */