-static inline unsigned char *
-sg_scatg2virt(const struct scatterlist *sclp)
-{
- return (sclp && sclp->page) ?
- (unsigned char *) page_address(sclp->page) + sclp->offset : NULL;
-}
-
-/* When startFinish==1 increments page counts for pages other than the
- first of scatter gather elements obtained from __get_free_pages().
- When startFinish==0 decrements ... */
-static void
-sg_rb_correct4mmap(Sg_scatter_hold * rsv_schp, int startFinish)
-{
- void *page_ptr;
- struct page *page;
- int k, m;
-
- SCSI_LOG_TIMEOUT(3, printk("sg_rb_correct4mmap: startFinish=%d, scatg=%d\n",
- startFinish, rsv_schp->k_use_sg));
- /* N.B. correction _not_ applied to base page of each allocation */
- if (rsv_schp->k_use_sg) { /* reserve buffer is a scatter gather list */
- struct scatterlist *sclp = rsv_schp->buffer;
-
- for (k = 0; k < rsv_schp->k_use_sg; ++k, ++sclp) {
- for (m = PAGE_SIZE; m < sclp->length; m += PAGE_SIZE) {
- page_ptr = sg_scatg2virt(sclp) + m;
- page = virt_to_page(page_ptr);
- if (startFinish)
- get_page(page);
- else {
- if (page_count(page) > 0)
- __put_page(page);
- }
- }
- }
- } else { /* reserve buffer is just a single allocation */
- for (m = PAGE_SIZE; m < rsv_schp->bufflen; m += PAGE_SIZE) {
- page_ptr = (unsigned char *) rsv_schp->buffer + m;
- page = virt_to_page(page_ptr);
- if (startFinish)
- get_page(page);
- else {
- if (page_count(page) > 0)
- __put_page(page);
- }
- }
- }
-}
-