X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Farch%2Fmips%2Finclude%2Fasm%2Fspinlock.h;h=40196bebe849a0c825cc8a61e40b03440d14f31e;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=1fca2e0793dcbbebd75784b90ad8e2513e0fcd45;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git

diff --git a/kernel/arch/mips/include/asm/spinlock.h b/kernel/arch/mips/include/asm/spinlock.h
index 1fca2e079..40196bebe 100644
--- a/kernel/arch/mips/include/asm/spinlock.h
+++ b/kernel/arch/mips/include/asm/spinlock.h
@@ -42,6 +42,11 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
 	return ((counters >> 16) ^ counters) & 0xffff;
 }
 
+static inline int arch_spin_value_unlocked(arch_spinlock_t lock)
+{
+	return lock.h.serving_now == lock.h.ticket;
+}
+
 #define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock)
 #define arch_spin_unlock_wait(x) \
 	while (arch_spin_is_locked(x)) { cpu_relax(); }
@@ -109,7 +114,7 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 		"	 subu	%[ticket], %[my_ticket], %[ticket]	\n"
 		"2:							\n"
 		"	.subsection 2					\n"
-		"4:	andi	%[ticket], %[ticket], 0x1fff		\n"
+		"4:	andi	%[ticket], %[ticket], 0xffff		\n"
 		"	sll	%[ticket], 5				\n"
 		"							\n"
 		"6:	bnez	%[ticket], 6b				\n"
@@ -317,7 +322,7 @@ static inline void arch_write_lock(arch_rwlock_t *rw)
 
 static inline void arch_write_unlock(arch_rwlock_t *rw)
 {
-	smp_mb();
+	smp_mb__before_llsc();
 
 	__asm__ __volatile__(
 	"				# arch_write_unlock	\n"