diff options
Diffstat (limited to 'include/asm-mips/local.h')
| -rw-r--r-- | include/asm-mips/local.h | 89 |
1 files changed, 11 insertions, 78 deletions
diff --git a/include/asm-mips/local.h b/include/asm-mips/local.h index ed882c88e0c..f96fd59e084 100644 --- a/include/asm-mips/local.h +++ b/include/asm-mips/local.h @@ -4,6 +4,7 @@ #include <linux/percpu.h> #include <linux/bitops.h> #include <asm/atomic.h> +#include <asm/cmpxchg.h> #include <asm/war.h> typedef struct @@ -14,10 +15,10 @@ typedef struct #define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) } #define local_read(l) atomic_long_read(&(l)->a) -#define local_set(l,i) atomic_long_set(&(l)->a, (i)) +#define local_set(l, i) atomic_long_set(&(l)->a, (i)) -#define local_add(i,l) atomic_long_add((i),(&(l)->a)) -#define local_sub(i,l) atomic_long_sub((i),(&(l)->a)) +#define local_add(i, l) atomic_long_add((i), (&(l)->a)) +#define local_sub(i, l) atomic_long_sub((i), (&(l)->a)) #define local_inc(l) atomic_long_inc(&(l)->a) #define local_dec(l) atomic_long_dec(&(l)->a) @@ -114,71 +115,9 @@ static __inline__ long local_sub_return(long i, local_t * l) return result; } -/* - * local_sub_if_positive - conditionally subtract integer from atomic variable - * @i: integer value to subtract - * @l: pointer of type local_t - * - * Atomically test @l and subtract @i if @l is greater or equal than @i. - * The function returns the old value of @l minus @i. - */ -static __inline__ long local_sub_if_positive(long i, local_t * l) -{ - unsigned long result; - - if (cpu_has_llsc && R10000_LLSC_WAR) { - unsigned long temp; - - __asm__ __volatile__( - " .set mips3 \n" - "1:" __LL "%1, %2 # local_sub_if_positive\n" - " dsubu %0, %1, %3 \n" - " bltz %0, 1f \n" - __SC "%0, %2 \n" - " .set noreorder \n" - " beqzl %0, 1b \n" - " dsubu %0, %1, %3 \n" - " .set reorder \n" - "1: \n" - " .set mips0 \n" - : "=&r" (result), "=&r" (temp), "=m" (l->a.counter) - : "Ir" (i), "m" (l->a.counter) - : "memory"); - } else if (cpu_has_llsc) { - unsigned long temp; - - __asm__ __volatile__( - " .set mips3 \n" - "1:" __LL "%1, %2 # local_sub_if_positive\n" - " dsubu %0, %1, %3 \n" - " bltz %0, 1f \n" - __SC "%0, %2 \n" - " .set noreorder \n" - " beqz %0, 1b \n" - " dsubu %0, %1, %3 \n" - " .set reorder \n" - "1: \n" - " .set mips0 \n" - : "=&r" (result), "=&r" (temp), "=m" (l->a.counter) - : "Ir" (i), "m" (l->a.counter) - : "memory"); - } else { - unsigned long flags; - - local_irq_save(flags); - result = l->a.counter; - result -= i; - if (result >= 0) - l->a.counter = result; - local_irq_restore(flags); - } - - return result; -} - #define local_cmpxchg(l, o, n) \ ((long)cmpxchg_local(&((l)->a.counter), (o), (n))) -#define local_xchg(l, n) (xchg_local(&((l)->a.counter),(n))) +#define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n))) /** * local_add_unless - add unless the number is a given value @@ -199,8 +138,8 @@ static __inline__ long local_sub_if_positive(long i, local_t * l) }) #define local_inc_not_zero(l) local_add_unless((l), 1, 0) -#define local_dec_return(l) local_sub_return(1,(l)) -#define local_inc_return(l) local_add_return(1,(l)) +#define local_dec_return(l) local_sub_return(1, (l)) +#define local_inc_return(l) local_add_return(1, (l)) /* * local_sub_and_test - subtract value from variable and test result @@ -211,7 +150,7 @@ static __inline__ long local_sub_if_positive(long i, local_t * l) * true if the result is zero, or false for all * other cases. */ -#define local_sub_and_test(i,l) (local_sub_return((i), (l)) == 0) +#define local_sub_and_test(i, l) (local_sub_return((i), (l)) == 0) /* * local_inc_and_test - increment and test @@ -234,12 +173,6 @@ static __inline__ long local_sub_if_positive(long i, local_t * l) #define local_dec_and_test(l) (local_sub_return(1, (l)) == 0) /* - * local_dec_if_positive - decrement by 1 if old value positive - * @l: pointer of type local_t - */ -#define local_dec_if_positive(l) local_sub_if_positive(1, l) - -/* * local_add_negative - add and test if negative * @l: pointer of type local_t * @i: integer value to add @@ -248,7 +181,7 @@ static __inline__ long local_sub_if_positive(long i, local_t * l) * if the result is negative, or false when * result is greater than or equal to zero. */ -#define local_add_negative(i,l) (local_add_return(i, (l)) < 0) +#define local_add_negative(i, l) (local_add_return(i, (l)) < 0) /* Use these for per-cpu local_t variables: on some archs they are * much more efficient than these naive implementations. Note they take @@ -257,8 +190,8 @@ static __inline__ long local_sub_if_positive(long i, local_t * l) #define __local_inc(l) ((l)->a.counter++) #define __local_dec(l) ((l)->a.counter++) -#define __local_add(i,l) ((l)->a.counter+=(i)) -#define __local_sub(i,l) ((l)->a.counter-=(i)) +#define __local_add(i, l) ((l)->a.counter+=(i)) +#define __local_sub(i, l) ((l)->a.counter-=(i)) /* Need to disable preemption for the cpu local counters otherwise we could still access a variable of a previous CPU in a non atomic way. */ |