HWPOISON: Use bitmask/action code for try_to_unmap behaviour

[safe/jmp/linux-2.6] / include / linux / rmap.h

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 8dff2ff..4c4a2d4 100644 (file)
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -85,7 +85,18 @@ static inline void page_dup_rmap(struct page *page, struct vm_area_struct *vma,
  */
 int page_referenced(struct page *, int is_locked,
                        struct mem_cgroup *cnt, unsigned long *vm_flags);
-int try_to_unmap(struct page *, int ignore_refs);
+enum ttu_flags {
+       TTU_UNMAP = 0,                  /* unmap mode */
+       TTU_MIGRATION = 1,              /* migration mode */
+       TTU_MUNLOCK = 2,                /* munlock mode */
+       TTU_ACTION_MASK = 0xff,
+
+       TTU_IGNORE_MLOCK = (1 << 8),    /* ignore mlock */
+       TTU_IGNORE_ACCESS = (1 << 9),   /* don't age */
+};
+#define TTU_ACTION(x) ((x) & TTU_ACTION_MASK)
+
+int try_to_unmap(struct page *, enum ttu_flags flags);
 
 /*
  * Called from mm/filemap_xip.c to unmap empty zero page