diff options
Diffstat (limited to 'kernel/arch/mips/include/asm/spinlock.h')
| -rw-r--r-- | kernel/arch/mips/include/asm/spinlock.h | 9 |
1 files changed, 7 insertions, 2 deletions
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" |