diff options
| -rw-r--r-- | arch/mips/include/asm/spinlock.h | 116 |
1 files changed, 44 insertions, 72 deletions
diff --git a/arch/mips/include/asm/spinlock.h b/arch/mips/include/asm/spinlock.h index 5130c88d6420..0b1dbd22e6f8 100644 --- a/arch/mips/include/asm/spinlock.h +++ b/arch/mips/include/asm/spinlock.h @@ -242,25 +242,16 @@ static inline void arch_read_lock(arch_rwlock_t *rw) : "m" (rw->lock) : "memory"); } else { - __asm__ __volatile__( - " .set noreorder # arch_read_lock \n" - "1: ll %1, %2 \n" - " bltz %1, 3f \n" - " addu %1, 1 \n" - "2: sc %1, %0 \n" - " beqz %1, 1b \n" - " nop \n" - " .subsection 2 \n" - "3: ll %1, %2 \n" - " bltz %1, 3b \n" - " addu %1, 1 \n" - " b 2b \n" - " nop \n" - " .previous \n" - " .set reorder \n" - : "=m" (rw->lock), "=&r" (tmp) - : "m" (rw->lock) - : "memory"); + do { + __asm__ __volatile__( + "1: ll %1, %2 # arch_read_lock \n" + " bltz %1, 1b \n" + " addu %1, 1 \n" + "2: sc %1, %0 \n" + : "=m" (rw->lock), "=&r" (tmp) + : "m" (rw->lock) + : "memory"); + } while (unlikely(!tmp)); } smp_llsc_mb(); @@ -285,21 +276,15 @@ static inline void arch_read_unlock(arch_rwlock_t *rw) : "m" (rw->lock) : "memory"); } else { - __asm__ __volatile__( - " .set noreorder # arch_read_unlock \n" - "1: ll %1, %2 \n" - " sub %1, 1 \n" - " sc %1, %0 \n" - " beqz %1, 2f \n" - " nop \n" - " .subsection 2 \n" - "2: b 1b \n" - " nop \n" - " .previous \n" - " .set reorder \n" - : "=m" (rw->lock), "=&r" (tmp) - : "m" (rw->lock) - : "memory"); + do { + __asm__ __volatile__( + "1: ll %1, %2 # arch_read_unlock \n" + " sub %1, 1 \n" + " sc %1, %0 \n" + : "=m" (rw->lock), "=&r" (tmp) + : "m" (rw->lock) + : "memory"); + } while (unlikely(!tmp)); } } @@ -321,25 +306,16 @@ static inline void arch_write_lock(arch_rwlock_t *rw) : "m" (rw->lock) : "memory"); } else { - __asm__ __volatile__( - " .set noreorder # arch_write_lock \n" - "1: ll %1, %2 \n" - " bnez %1, 3f \n" - " lui %1, 0x8000 \n" - "2: sc %1, %0 \n" - " beqz %1, 3f \n" - " nop \n" - " .subsection 2 \n" - "3: ll %1, %2 \n" - " bnez %1, 3b \n" - " lui %1, 0x8000 \n" - " b 2b \n" - " nop \n" - " .previous \n" - " .set reorder \n" - : "=m" (rw->lock), "=&r" (tmp) - : "m" (rw->lock) - : "memory"); + do { + __asm__ __volatile__( + "1: ll %1, %2 # arch_write_lock \n" + " bnez %1, 1b \n" + " lui %1, 0x8000 \n" + "2: sc %1, %0 \n" + : "=m" (rw->lock), "=&r" (tmp) + : "m" (rw->lock) + : "memory"); + } while (unlikely(!tmp)); } smp_llsc_mb(); @@ -424,25 +400,21 @@ static inline int arch_write_trylock(arch_rwlock_t *rw) : "m" (rw->lock) : "memory"); } else { - __asm__ __volatile__( - " .set noreorder # arch_write_trylock \n" - " li %2, 0 \n" - "1: ll %1, %3 \n" - " bnez %1, 2f \n" - " lui %1, 0x8000 \n" - " sc %1, %0 \n" - " beqz %1, 3f \n" - " li %2, 1 \n" - "2: \n" - __WEAK_LLSC_MB - " .subsection 2 \n" - "3: b 1b \n" - " li %2, 0 \n" - " .previous \n" - " .set reorder \n" - : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret) - : "m" (rw->lock) - : "memory"); + do { + __asm__ __volatile__( + " ll %1, %3 # arch_write_trylock \n" + " li %2, 0 \n" + " bnez %1, 2f \n" + " lui %1, 0x8000 \n" + " sc %1, %0 \n" + " li %2, 1 \n" + "2: \n" + : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret) + : "m" (rw->lock) + : "memory"); + } while (unlikely(!tmp)); + + smp_llsc_mb(); } return ret; |