* Returns the given page's predecessor (by pindex) within the object if it is * resident; if none is found, NULL is returned. * * The object must be locked. */
| 1809 | * The object must be locked. |
| 1810 | */ |
| 1811 | vm_page_t |
| 1812 | vm_page_prev(vm_page_t m) |
| 1813 | { |
| 1814 | vm_page_t prev; |
| 1815 | |
| 1816 | VM_OBJECT_ASSERT_LOCKED(m->object); |
| 1817 | if ((prev = TAILQ_PREV(m, pglist, listq)) != NULL) { |
| 1818 | MPASS(prev->object == m->object); |
| 1819 | if (prev->pindex != m->pindex - 1) |
| 1820 | prev = NULL; |
| 1821 | } |
| 1822 | return (prev); |
| 1823 | } |
| 1824 | |
| 1825 | /* |
| 1826 | * Uses the page mnew as a replacement for an existing page at index |
no outgoing calls
no test coverage detected