sg_append_table
struct sg_append_table table;
void sg_free_append_table(struct sg_append_table *sgt);
int sg_alloc_append_table_from_pages(struct sg_append_table *sgt,
struct sg_append_table sgt_append;
void sg_free_append_table(struct sg_append_table *table)
static struct scatterlist *get_next_sg(struct sg_append_table *table,
int sg_alloc_append_table_from_pages(struct sg_append_table *sgt_append,
struct sg_append_table append = {};
struct sg_append_table append = {};