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-rw-r--r--arch/mips/Makefile3
-rw-r--r--arch/mips/include/asm/atomic.h208
-rw-r--r--arch/mips/include/asm/bitops.h270
-rw-r--r--arch/mips/include/asm/cmpxchg.h7
-rw-r--r--arch/mips/include/asm/system.h52
5 files changed, 243 insertions, 297 deletions
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index f4a4b663ebb..1a81240102c 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -48,9 +48,6 @@ ifneq ($(SUBARCH),$(ARCH))
endif
endif
-ifndef CONFIG_FUNCTION_TRACER
-cflags-y := -ffunction-sections
-endif
ifdef CONFIG_FUNCTION_GRAPH_TRACER
ifndef KBUILD_MCOUNT_RA_ADDRESS
ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
index 47d87da379f..4a02fe891ab 100644
--- a/arch/mips/include/asm/atomic.h
+++ b/arch/mips/include/asm/atomic.h
@@ -64,18 +64,16 @@ static __inline__ void atomic_add(int i, atomic_t * v)
} else if (kernel_uses_llsc) {
int temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %0, %1 # atomic_add \n"
- " addu %0, %2 \n"
- " sc %0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " ll %0, %1 # atomic_add \n"
+ " addu %0, %2 \n"
+ " sc %0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter));
+ } while (unlikely(!temp));
} else {
unsigned long flags;
@@ -109,18 +107,16 @@ static __inline__ void atomic_sub(int i, atomic_t * v)
} else if (kernel_uses_llsc) {
int temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %0, %1 # atomic_sub \n"
- " subu %0, %2 \n"
- " sc %0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " ll %0, %1 # atomic_sub \n"
+ " subu %0, %2 \n"
+ " sc %0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter));
+ } while (unlikely(!temp));
} else {
unsigned long flags;
@@ -156,20 +152,19 @@ static __inline__ int atomic_add_return(int i, atomic_t * v)
} else if (kernel_uses_llsc) {
int temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %1, %2 # atomic_add_return \n"
- " addu %0, %1, %3 \n"
- " sc %0, %2 \n"
- " beqz %0, 2f \n"
- " addu %0, %1, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (result), "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " ll %1, %2 # atomic_add_return \n"
+ " addu %0, %1, %3 \n"
+ " sc %0, %2 \n"
+ " .set mips0 \n"
+ : "=&r" (result), "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter)
+ : "memory");
+ } while (unlikely(!result));
+
+ result = temp + i;
} else {
unsigned long flags;
@@ -205,23 +200,24 @@ static __inline__ int atomic_sub_return(int i, atomic_t * v)
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
: "Ir" (i), "m" (v->counter)
: "memory");
+
+ result = temp - i;
} else if (kernel_uses_llsc) {
int temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %1, %2 # atomic_sub_return \n"
- " subu %0, %1, %3 \n"
- " sc %0, %2 \n"
- " beqz %0, 2f \n"
- " subu %0, %1, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (result), "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " ll %1, %2 # atomic_sub_return \n"
+ " subu %0, %1, %3 \n"
+ " sc %0, %2 \n"
+ " .set mips0 \n"
+ : "=&r" (result), "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter)
+ : "memory");
+ } while (unlikely(!result));
+
+ result = temp - i;
} else {
unsigned long flags;
@@ -279,12 +275,9 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
" bltz %0, 1f \n"
" sc %0, %2 \n"
" .set noreorder \n"
- " beqz %0, 2f \n"
+ " beqz %0, 1b \n"
" subu %0, %1, %3 \n"
" .set reorder \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
"1: \n"
" .set mips0 \n"
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
@@ -443,18 +436,16 @@ static __inline__ void atomic64_add(long i, atomic64_t * v)
} else if (kernel_uses_llsc) {
long temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: lld %0, %1 # atomic64_add \n"
- " daddu %0, %2 \n"
- " scd %0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " lld %0, %1 # atomic64_add \n"
+ " daddu %0, %2 \n"
+ " scd %0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter));
+ } while (unlikely(!temp));
} else {
unsigned long flags;
@@ -488,18 +479,16 @@ static __inline__ void atomic64_sub(long i, atomic64_t * v)
} else if (kernel_uses_llsc) {
long temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: lld %0, %1 # atomic64_sub \n"
- " dsubu %0, %2 \n"
- " scd %0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " lld %0, %1 # atomic64_sub \n"
+ " dsubu %0, %2 \n"
+ " scd %0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter));
+ } while (unlikely(!temp));
} else {
unsigned long flags;
@@ -535,20 +524,19 @@ static __inline__ long atomic64_add_return(long i, atomic64_t * v)
} else if (kernel_uses_llsc) {
long temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: lld %1, %2 # atomic64_add_return \n"
- " daddu %0, %1, %3 \n"
- " scd %0, %2 \n"
- " beqz %0, 2f \n"
- " daddu %0, %1, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (result), "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " lld %1, %2 # atomic64_add_return \n"
+ " daddu %0, %1, %3 \n"
+ " scd %0, %2 \n"
+ " .set mips0 \n"
+ : "=&r" (result), "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter)
+ : "memory");
+ } while (unlikely(!result));
+
+ result = temp + i;
} else {
unsigned long flags;
@@ -587,20 +575,19 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
} else if (kernel_uses_llsc) {
long temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: lld %1, %2 # atomic64_sub_return \n"
- " dsubu %0, %1, %3 \n"
- " scd %0, %2 \n"
- " beqz %0, 2f \n"
- " dsubu %0, %1, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (result), "=&r" (temp), "=m" (v->counter)
- : "Ir" (i), "m" (v->counter)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " lld %1, %2 # atomic64_sub_return \n"
+ " dsubu %0, %1, %3 \n"
+ " scd %0, %2 \n"
+ " .set mips0 \n"
+ : "=&r" (result), "=&r" (temp), "=m" (v->counter)
+ : "Ir" (i), "m" (v->counter)
+ : "memory");
+ } while (unlikely(!result));
+
+ result = temp - i;
} else {
unsigned long flags;
@@ -658,12 +645,9 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
" bltz %0, 1f \n"
" scd %0, %2 \n"
" .set noreorder \n"
- " beqz %0, 2f \n"
+ " beqz %0, 1b \n"
" dsubu %0, %1, %3 \n"
" .set reorder \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
"1: \n"
" .set mips0 \n"
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index b0ce7ca2851..50b4ef288c5 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -73,30 +73,26 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
: "ir" (1UL << bit), "m" (*m));
#ifdef CONFIG_CPU_MIPSR2
} else if (kernel_uses_llsc && __builtin_constant_p(bit)) {
- __asm__ __volatile__(
- "1: " __LL "%0, %1 # set_bit \n"
- " " __INS "%0, %4, %2, 1 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (bit), "m" (*m), "r" (~0));
+ do {
+ __asm__ __volatile__(
+ " " __LL "%0, %1 # set_bit \n"
+ " " __INS "%0, %3, %2, 1 \n"
+ " " __SC "%0, %1 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (bit), "r" (~0));
+ } while (unlikely(!temp));
#endif /* CONFIG_CPU_MIPSR2 */
} else if (kernel_uses_llsc) {
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: " __LL "%0, %1 # set_bit \n"
- " or %0, %2 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << bit), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # set_bit \n"
+ " or %0, %2 \n"
+ " " __SC "%0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (1UL << bit));
+ } while (unlikely(!temp));
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -134,34 +130,30 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
" " __SC "%0, %1 \n"
" beqzl %0, 1b \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (~(1UL << bit)), "m" (*m));
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (~(1UL << bit)));
#ifdef CONFIG_CPU_MIPSR2
} else if (kernel_uses_llsc && __builtin_constant_p(bit)) {
- __asm__ __volatile__(
- "1: " __LL "%0, %1 # clear_bit \n"
- " " __INS "%0, $0, %2, 1 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (bit), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " " __LL "%0, %1 # clear_bit \n"
+ " " __INS "%0, $0, %2, 1 \n"
+ " " __SC "%0, %1 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (bit));
+ } while (unlikely(!temp));
#endif /* CONFIG_CPU_MIPSR2 */
} else if (kernel_uses_llsc) {
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: " __LL "%0, %1 # clear_bit \n"
- " and %0, %2 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (~(1UL << bit)), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # clear_bit \n"
+ " and %0, %2 \n"
+ " " __SC "%0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (~(1UL << bit)));
+ } while (unlikely(!temp));
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -213,24 +205,22 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
" " __SC "%0, %1 \n"
" beqzl %0, 1b \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << bit), "m" (*m));
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (1UL << bit));
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: " __LL "%0, %1 # change_bit \n"
- " xor %0, %2 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << bit), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # change_bit \n"
+ " xor %0, %2 \n"
+ " " __SC "%0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (1UL << bit));
+ } while (unlikely(!temp));
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -272,30 +262,26 @@ static inline int test_and_set_bit(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_set_bit \n"
- " or %2, %0, %3 \n"
- " " __SC "%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_set_bit \n"
+ " or %2, %0, %3 \n"
+ " " __SC "%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -340,30 +326,26 @@ static inline int test_and_set_bit_lock(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_set_bit \n"
- " or %2, %0, %3 \n"
- " " __SC "%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_set_bit \n"
+ " or %2, %0, %3 \n"
+ " " __SC "%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -410,49 +392,43 @@ static inline int test_and_clear_bit(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
#ifdef CONFIG_CPU_MIPSR2
} else if (kernel_uses_llsc && __builtin_constant_p(nr)) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- "1: " __LL "%0, %1 # test_and_clear_bit \n"
- " " __EXT "%2, %0, %3, 1 \n"
- " " __INS "%0, $0, %3, 1 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "ir" (bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " " __LL "%0, %1 # test_and_clear_bit \n"
+ " " __EXT "%2, %0, %3, 1 \n"
+ " " __INS "%0, $0, %3, 1 \n"
+ " " __SC "%0, %1 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "ir" (bit)
+ : "memory");
+ } while (unlikely(!temp));
#endif
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_clear_bit \n"
- " or %2, %0, %3 \n"
- " xor %2, %3 \n"
- " " __SC "%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_clear_bit \n"
+ " or %2, %0, %3 \n"
+ " xor %2, %3 \n"
+ " " __SC "%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -499,30 +475,26 @@ static inline int test_and_change_bit(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_change_bit \n"
- " xor %2, %0, %3 \n"
- " " __SC "\t%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_change_bit \n"
+ " xor %2, %0, %3 \n"
+ " " __SC "\t%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
diff --git a/arch/mips/include/asm/cmpxchg.h b/arch/mips/include/asm/cmpxchg.h
index 2d28017e95d..d8d1c2805ac 100644
--- a/arch/mips/include/asm/cmpxchg.h
+++ b/arch/mips/include/asm/cmpxchg.h
@@ -44,12 +44,9 @@
" move $1, %z4 \n" \
" .set mips3 \n" \
" " st " $1, %1 \n" \
- " beqz $1, 3f \n" \
- "2: \n" \
- " .subsection 2 \n" \
- "3: b 1b \n" \
- " .previous \n" \
+ " beqz $1, 1b \n" \
" .set pop \n" \
+ "2: \n" \
: "=&r" (__ret), "=R" (*m) \
: "R" (*m), "Jr" (old), "Jr" (new) \
: "memory"); \
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h
index bb937ccfba1..6018c80ce37 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;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-29 03:53:31 +0000