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-rw-r--r--lib/resource.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/resource.h b/lib/resource.h
index 4cedbf00..8bb264b1 100644
--- a/lib/resource.h
+++ b/lib/resource.h
@@ -115,6 +115,7 @@ void sl_free(void *);
void buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size);
/* Allocator of whole pages; for use in slabs and other high-level allocators. */
+#define PAGE_HEAD(x) ((void *) (((uintptr_t) (x)) & ~(page_size-1)))
extern long page_size;
void *alloc_page(void);
void free_page(void *);