X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-mips%2Fatomic.h;h=a798d6299a7927ee22d706e9a46c10f4ed9a73a0;hb=2cdf79cafbd11580f5b63cd4993b45c1c4952415;hp=1ac50b6c47adfc634ad55a3b023dc1d63fce7d3e;hpb=e0cc09e295f346b7921e921f385fe5213472316a;p=linux-2.6-omap-h63xx.git

diff --git a/include/asm-mips/atomic.h b/include/asm-mips/atomic.h
index 1ac50b6c47a..a798d6299a7 100644
--- a/include/asm-mips/atomic.h
+++ b/include/asm-mips/atomic.h
@@ -18,6 +18,7 @@
 #include <asm/barrier.h>
 #include <asm/cpu-features.h>
 #include <asm/war.h>
+#include <asm/system.h>
 
 typedef struct { volatile int counter; } atomic_t;
 
@@ -38,7 +39,7 @@ typedef struct { volatile int counter; } atomic_t;
  *
  * Atomically sets the value of @v to @i.
  */
-#define atomic_set(v,i)		((v)->counter = (i))
+#define atomic_set(v, i)		((v)->counter = (i))
 
 /*
  * atomic_add - add integer to atomic variable
@@ -137,7 +138,7 @@ static __inline__ int atomic_add_return(int i, atomic_t * v)
 {
 	unsigned long result;
 
-	smp_mb();
+	smp_llsc_mb();
 
 	if (cpu_has_llsc && R10000_LLSC_WAR) {
 		unsigned long temp;
@@ -180,7 +181,7 @@ static __inline__ int atomic_add_return(int i, atomic_t * v)
 		raw_local_irq_restore(flags);
 	}
 
-	smp_mb();
+	smp_llsc_mb();
 
 	return result;
 }
@@ -189,7 +190,7 @@ static __inline__ int atomic_sub_return(int i, atomic_t * v)
 {
 	unsigned long result;
 
-	smp_mb();
+	smp_llsc_mb();
 
 	if (cpu_has_llsc && R10000_LLSC_WAR) {
 		unsigned long temp;
@@ -232,7 +233,7 @@ static __inline__ int atomic_sub_return(int i, atomic_t * v)
 		raw_local_irq_restore(flags);
 	}
 
-	smp_mb();
+	smp_llsc_mb();
 
 	return result;
 }
@@ -249,7 +250,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
 {
 	unsigned long result;
 
-	smp_mb();
+	smp_llsc_mb();
 
 	if (cpu_has_llsc && R10000_LLSC_WAR) {
 		unsigned long temp;
@@ -301,13 +302,13 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
 		raw_local_irq_restore(flags);
 	}
 
-	smp_mb();
+	smp_llsc_mb();
 
 	return result;
 }
 
-#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
-#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), (new)))
 
 /**
  * atomic_add_unless - add unless the number is a given value
@@ -318,18 +319,24 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
  * Atomically adds @a to @v, so long as it was not @u.
  * Returns non-zero if @v was not @u, and zero otherwise.
  */
-#define atomic_add_unless(v, a, u)				\
-({								\
-	int c, old;						\
-	c = atomic_read(v);					\
-	while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
-		c = old;					\
-	c != (u);						\
-})
+static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
+{
+	int c, old;
+	c = atomic_read(v);
+	for (;;) {
+		if (unlikely(c == (u)))
+			break;
+		old = atomic_cmpxchg((v), c, c + (a));
+		if (likely(old == c))
+			break;
+		c = old;
+	}
+	return c != (u);
+}
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
-#define atomic_dec_return(v) atomic_sub_return(1,(v))
-#define atomic_inc_return(v) atomic_add_return(1,(v))
+#define atomic_dec_return(v) atomic_sub_return(1, (v))
+#define atomic_inc_return(v) atomic_add_return(1, (v))
 
 /*
  * atomic_sub_and_test - subtract value from variable and test result
@@ -340,7 +347,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
  * true if the result is zero, or false for all
  * other cases.
  */
-#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
+#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
 
 /*
  * atomic_inc_and_test - increment and test
@@ -374,7 +381,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
  *
  * Atomically increments @v by 1.
  */
-#define atomic_inc(v) atomic_add(1,(v))
+#define atomic_inc(v) atomic_add(1, (v))
 
 /*
  * atomic_dec - decrement and test
@@ -382,7 +389,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
  *
  * Atomically decrements @v by 1.
  */
-#define atomic_dec(v) atomic_sub(1,(v))
+#define atomic_dec(v) atomic_sub(1, (v))
 
 /*
  * atomic_add_negative - add and test if negative
@@ -393,7 +400,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
  * if the result is negative, or false when
  * result is greater than or equal to zero.
  */
-#define atomic_add_negative(i,v) (atomic_add_return(i, (v)) < 0)
+#define atomic_add_negative(i, v) (atomic_add_return(i, (v)) < 0)
 
 #ifdef CONFIG_64BIT
 
@@ -413,7 +420,7 @@ typedef struct { volatile long counter; } atomic64_t;
  * @v: pointer of type atomic64_t
  * @i: required value
  */
-#define atomic64_set(v,i)	((v)->counter = (i))
+#define atomic64_set(v, i)	((v)->counter = (i))
 
 /*
  * atomic64_add - add integer to atomic variable
@@ -512,7 +519,7 @@ static __inline__ long atomic64_add_return(long i, atomic64_t * v)
 {
 	unsigned long result;
 
-	smp_mb();
+	smp_llsc_mb();
 
 	if (cpu_has_llsc && R10000_LLSC_WAR) {
 		unsigned long temp;
@@ -555,7 +562,7 @@ static __inline__ long atomic64_add_return(long i, atomic64_t * v)
 		raw_local_irq_restore(flags);
 	}
 
-	smp_mb();
+	smp_llsc_mb();
 
 	return result;
 }
@@ -564,7 +571,7 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
 {
 	unsigned long result;
 
-	smp_mb();
+	smp_llsc_mb();
 
 	if (cpu_has_llsc && R10000_LLSC_WAR) {
 		unsigned long temp;
@@ -607,7 +614,7 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
 		raw_local_irq_restore(flags);
 	}
 
-	smp_mb();
+	smp_llsc_mb();
 
 	return result;
 }
@@ -624,7 +631,7 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
 {
 	unsigned long result;
 
-	smp_mb();
+	smp_llsc_mb();
 
 	if (cpu_has_llsc && R10000_LLSC_WAR) {
 		unsigned long temp;
@@ -676,13 +683,43 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
 		raw_local_irq_restore(flags);
 	}
 
-	smp_mb();
+	smp_llsc_mb();
 
 	return result;
 }
 
-#define atomic64_dec_return(v) atomic64_sub_return(1,(v))
-#define atomic64_inc_return(v) atomic64_add_return(1,(v))
+#define atomic64_cmpxchg(v, o, n) \
+	((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
+#define atomic64_xchg(v, new) (xchg(&((v)->counter), (new)))
+
+/**
+ * atomic64_add_unless - add unless the number is a given value
+ * @v: pointer of type atomic64_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as it was not @u.
+ * Returns non-zero if @v was not @u, and zero otherwise.
+ */
+static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
+{
+	long c, old;
+	c = atomic64_read(v);
+	for (;;) {
+		if (unlikely(c == (u)))
+			break;
+		old = atomic64_cmpxchg((v), c, c + (a));
+		if (likely(old == c))
+			break;
+		c = old;
+	}
+	return c != (u);
+}
+
+#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
+
+#define atomic64_dec_return(v) atomic64_sub_return(1, (v))
+#define atomic64_inc_return(v) atomic64_add_return(1, (v))
 
 /*
  * atomic64_sub_and_test - subtract value from variable and test result
@@ -693,7 +730,7 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
  * true if the result is zero, or false for all
  * other cases.
  */
-#define atomic64_sub_and_test(i,v) (atomic64_sub_return((i), (v)) == 0)
+#define atomic64_sub_and_test(i, v) (atomic64_sub_return((i), (v)) == 0)
 
 /*
  * atomic64_inc_and_test - increment and test
@@ -727,7 +764,7 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
  *
  * Atomically increments @v by 1.
  */
-#define atomic64_inc(v) atomic64_add(1,(v))
+#define atomic64_inc(v) atomic64_add(1, (v))
 
 /*
  * atomic64_dec - decrement and test
@@ -735,7 +772,7 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
  *
  * Atomically decrements @v by 1.
  */
-#define atomic64_dec(v) atomic64_sub(1,(v))
+#define atomic64_dec(v) atomic64_sub(1, (v))
 
 /*
  * atomic64_add_negative - add and test if negative
@@ -746,7 +783,7 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
  * if the result is negative, or false when
  * result is greater than or equal to zero.
  */
-#define atomic64_add_negative(i,v) (atomic64_add_return(i, (v)) < 0)
+#define atomic64_add_negative(i, v) (atomic64_add_return(i, (v)) < 0)
 
 #endif /* CONFIG_64BIT */
 
@@ -754,10 +791,11 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
  * atomic*_return operations are serializing but not the non-*_return
  * versions.
  */
-#define smp_mb__before_atomic_dec()	smp_mb()
-#define smp_mb__after_atomic_dec()	smp_mb()
-#define smp_mb__before_atomic_inc()	smp_mb()
-#define smp_mb__after_atomic_inc()	smp_mb()
+#define smp_mb__before_atomic_dec()	smp_llsc_mb()
+#define smp_mb__after_atomic_dec()	smp_llsc_mb()
+#define smp_mb__before_atomic_inc()	smp_llsc_mb()
+#define smp_mb__after_atomic_inc()	smp_llsc_mb()
 
 #include <asm-generic/atomic.h>
+
 #endif /* _ASM_ATOMIC_H */