vm/vm_page: provide accessors to private data

Make per-page private data generic, provide accessors, and make the
slab allocator use them.

1 files changed, 16 insertions, 1 deletions

diff --git a/vm/vm_page.h b/vm/vm_page.h
index 097bcc6b..1ce172f2 100644
--- a/vm/vm_page.h
+++ b/vm/vm_page.h
@@ -76,7 +76,7 @@ struct vm_page {
     unsigned short seg_index;
     unsigned short order;
     phys_addr_t phys_addr;
-    void *slab_priv;
+    void *priv;
 };
 
 static inline unsigned short
@@ -122,6 +122,21 @@ vm_page_direct_ptr(const struct vm_page *page)
 }
 
 /*
+ * Associate private data with a page.
+ */
+static inline void
+vm_page_set_priv(struct vm_page *page, void *priv)
+{
+    page->priv = priv;
+}
+
+static inline void *
+vm_page_get_priv(const struct vm_page *page)
+{
+    return page->priv;
+}
+
+/*
  * Load physical memory into the vm_page module at boot time.
  *
  * All addresses must be page-aligned. Segments can be loaded in any order.