diff options
Diffstat (limited to 'arch/mips/include/asm/system.h')
| -rw-r--r-- | arch/mips/include/asm/system.h | 52 |
1 files changed, 24 insertions, 28 deletions
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h index bb937ccfba1e..6018c80ce37a 100644 --- a/arch/mips/include/asm/system.h +++ b/arch/mips/include/asm/system.h @@ -115,21 +115,19 @@ static inline unsigned long __xchg_u32(volatile int * m, unsigned int val) } else if (kernel_uses_llsc) { unsigned long dummy; - __asm__ __volatile__( - " .set mips3 \n" - "1: ll %0, %3 # xchg_u32 \n" - " .set mips0 \n" - " move %2, %z4 \n" - " .set mips3 \n" - " sc %2, %1 \n" - " beqz %2, 2f \n" - " .subsection 2 \n" - "2: b 1b \n" - " .previous \n" - " .set mips0 \n" - : "=&r" (retval), "=m" (*m), "=&r" (dummy) - : "R" (*m), "Jr" (val) - : "memory"); + do { + __asm__ __volatile__( + " .set mips3 \n" + " ll %0, %3 # xchg_u32 \n" + " .set mips0 \n" + " move %2, %z4 \n" + " .set mips3 \n" + " sc %2, %1 \n" + " .set mips0 \n" + : "=&r" (retval), "=m" (*m), "=&r" (dummy) + : "R" (*m), "Jr" (val) + : "memory"); + } while (unlikely(!dummy)); } else { unsigned long flags; @@ -167,19 +165,17 @@ static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val) } else if (kernel_uses_llsc) { unsigned long dummy; - __asm__ __volatile__( - " .set mips3 \n" - "1: lld %0, %3 # xchg_u64 \n" - " move %2, %z4 \n" - " scd %2, %1 \n" - " beqz %2, 2f \n" - " .subsection 2 \n" - "2: b 1b \n" - " .previous \n" - " .set mips0 \n" - : "=&r" (retval), "=m" (*m), "=&r" (dummy) - : "R" (*m), "Jr" (val) - : "memory"); + do { + __asm__ __volatile__( + " .set mips3 \n" + " lld %0, %3 # xchg_u64 \n" + " move %2, %z4 \n" + " scd %2, %1 \n" + " .set mips0 \n" + : "=&r" (retval), "=m" (*m), "=&r" (dummy) + : "R" (*m), "Jr" (val) + : "memory"); + } while (unlikely(!dummy)); } else { unsigned long flags; |