slub: Do not use frozen page flag but a bit in the page counters

Do not use a page flag for the frozen bit. It needs to be part
of the state that is handled with cmpxchg_double(). So use a bit
in the counter struct in the page struct for that purpose.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

Conflicts:

	include/linux/page-flags.h
Fix merge

Signed-off-by: Willi Ye <williye97@gmail.com>

Conflicts:
	fs/dyn_sync_cntrl.c