ppc64: add large page bit, use lwsync instead of eieio for spinlock

release.

include/asm-ppc64/mmu.h

@@ -108,7 +108,7 @@ typedef struct {
 	unsigned long :     2; /* Software use */
 	unsigned long bolted: 1; /* HPTE is "bolted" */
 	unsigned long :     1; /* Software use */
-	unsigned long :     1; /* Reserved */
+	unsigned long l:    1; /* Virtual page is large (L=1) or 4 KB (L=0) */
 	unsigned long h:    1; /* Hash function identifier */
 	unsigned long v:    1; /* Valid (v=1) or invalid (v=0) */
 } Hpte_dword0;

include/asm-ppc64/spinlock.h

@@ -67,7 +67,7 @@ static __inline__ void _raw_spin_lock(spinlock_t *lock)
 
 static __inline__ void _raw_spin_unlock(spinlock_t *lock)
 {
-	__asm__ __volatile__("eieio	# spin_unlock": : :"memory");
+	__asm__ __volatile__("lwsync	# spin_unlock": : :"memory");
 	lock->lock = 0;
 }
 
@@ -137,7 +137,7 @@ static __inline__ void _raw_read_unlock(rwlock_t *rw)
 	unsigned int tmp;
 
 	__asm__ __volatile__(
-	"eieio				# read_unlock\n\
+	"lwsync				# read_unlock\n\
 1:	lwarx		%0,0,%1\n\
 	addic		%0,%0,-1\n\
 	stwcx.		%0,0,%1\n\
@@ -192,7 +192,7 @@ static __inline__ void _raw_write_lock(rwlock_t *rw)
 
 static __inline__ void _raw_write_unlock(rwlock_t *rw)
 {
-	__asm__ __volatile__("eieio		# write_unlock": : :"memory");
+	__asm__ __volatile__("lwsync		# write_unlock": : :"memory");
 	rw->lock = 0;
 }