diff options
Diffstat (limited to 'include/asm-mips/bitops.h')
| -rw-r--r-- | include/asm-mips/bitops.h | 51 |
1 files changed, 19 insertions, 32 deletions
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h index d995413e11f..ffe245b4258 100644 --- a/include/asm-mips/bitops.h +++ b/include/asm-mips/bitops.h @@ -238,10 +238,11 @@ static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr) { unsigned short bit = nr & SZLONG_MASK; + unsigned long res; if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); - unsigned long temp, res; + unsigned long temp; __asm__ __volatile__( " .set mips3 \n" @@ -254,11 +255,9 @@ static inline int test_and_set_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "r" (1UL << bit), "m" (*m) : "memory"); - - return res != 0; } else if (cpu_has_llsc) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); - unsigned long temp, res; + unsigned long temp; __asm__ __volatile__( " .set push \n" @@ -277,25 +276,22 @@ static inline int test_and_set_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "r" (1UL << bit), "m" (*m) : "memory"); - - return res != 0; } else { volatile unsigned long *a = addr; unsigned long mask; - int retval; unsigned long flags; a += nr >> SZLONG_LOG; mask = 1UL << bit; raw_local_irq_save(flags); - retval = (mask & *a) != 0; + res = (mask & *a); *a |= mask; raw_local_irq_restore(flags); - - return retval; } smp_mb(); + + return res != 0; } /* @@ -310,6 +306,7 @@ static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr) { unsigned short bit = nr & SZLONG_MASK; + unsigned long res; if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); @@ -327,12 +324,10 @@ static inline int test_and_clear_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "r" (1UL << bit), "m" (*m) : "memory"); - - return res != 0; #ifdef CONFIG_CPU_MIPSR2 } else if (__builtin_constant_p(nr)) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); - unsigned long temp, res; + unsigned long temp; __asm__ __volatile__( "1: " __LL "%0, %1 # test_and_clear_bit \n" @@ -346,12 +341,10 @@ static inline int test_and_clear_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "ri" (bit), "m" (*m) : "memory"); - - return res; #endif } else if (cpu_has_llsc) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); - unsigned long temp, res; + unsigned long temp; __asm__ __volatile__( " .set push \n" @@ -371,25 +364,22 @@ static inline int test_and_clear_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "r" (1UL << bit), "m" (*m) : "memory"); - - return res != 0; } else { volatile unsigned long *a = addr; unsigned long mask; - int retval; unsigned long flags; a += nr >> SZLONG_LOG; mask = 1UL << bit; raw_local_irq_save(flags); - retval = (mask & *a) != 0; + res = (mask & *a); *a &= ~mask; raw_local_irq_restore(flags); - - return retval; } smp_mb(); + + return res != 0; } /* @@ -404,10 +394,11 @@ static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr) { unsigned short bit = nr & SZLONG_MASK; + unsigned long res; if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); - unsigned long temp, res; + unsigned long temp; __asm__ __volatile__( " .set mips3 \n" @@ -420,11 +411,9 @@ static inline int test_and_change_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "r" (1UL << bit), "m" (*m) : "memory"); - - return res != 0; } else if (cpu_has_llsc) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); - unsigned long temp, res; + unsigned long temp; __asm__ __volatile__( " .set push \n" @@ -443,24 +432,22 @@ static inline int test_and_change_bit(unsigned long nr, : "=&r" (temp), "=m" (*m), "=&r" (res) : "r" (1UL << bit), "m" (*m) : "memory"); - - return res != 0; } else { volatile unsigned long *a = addr; - unsigned long mask, retval; + unsigned long mask; unsigned long flags; a += nr >> SZLONG_LOG; mask = 1UL << bit; raw_local_irq_save(flags); - retval = (mask & *a) != 0; + res = (mask & *a); *a ^= mask; raw_local_irq_restore(flags); - - return retval; } smp_mb(); + + return res != 0; } #include <asm-generic/bitops/non-atomic.h> |