Merge commit 'c70b3198' into thread-next [lots of conflicts]

There were more conflicts that I'd like to see, most notably in route
export. If a bisect identifies this commit with something related, it
may be simply true that this commit introduces that bug. Let's hope it
doesn't happen.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/slab.c b/lib/slab.c
index 38d10626..054daea1 100644
--- a/lib/slab.c
+++ b/lib/slab.c
@@ -197,7 +197,7 @@ static struct resclass sl_class = {
   slab_memsize
 };
 
-#define SL_GET_HEAD(x)	((struct sl_head *) (((uintptr_t) (x)) & ~(page_size-1)))
+#define SL_GET_HEAD(x)	PAGE_HEAD(x)
 
 #define SL_HEAD_CHANGE_STATE(_s, _h, _from, _to) ({ \
     ASSERT_DIE(_h->state == slh_##_from); \