/* An 64bit atomic type */
typedef struct {
- unsigned long long __aligned(8) counter;
+ u64 __aligned(8) counter;
} atomic64_t;
#define ATOMIC64_INIT(val) { (val) }
*/
#define __atomic64_read(ptr) ((ptr)->counter)
-static inline unsigned long long
-cmpxchg8b(unsigned long long *ptr, unsigned long long old, unsigned long long new)
-{
- asm volatile(
-
- LOCK_PREFIX "cmpxchg8b (%[ptr])\n"
-
- : "=A" (old)
-
- : [ptr] "D" (ptr),
- "A" (old),
- "b" (ll_low(new)),
- "c" (ll_high(new))
-
- : "memory");
-
- return old;
-}
-
-static inline unsigned long long
-atomic64_cmpxchg(atomic64_t *ptr, unsigned long long old_val,
- unsigned long long new_val)
-{
- return cmpxchg8b(&ptr->counter, old_val, new_val);
-}
+extern u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old_val, u64 new_val);
/**
* atomic64_xchg - xchg atomic64 variable
* Atomically xchgs the value of @ptr to @new_val and returns
* the old value.
*/
-
-static inline unsigned long long
-atomic64_xchg(atomic64_t *ptr, unsigned long long new_val)
-{
- unsigned long long old_val;
-
- do {
- old_val = atomic_read(ptr);
- } while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
-
- return old_val;
-}
+extern u64 atomic64_xchg(atomic64_t *ptr, u64 new_val);
/**
* atomic64_set - set atomic64 variable
*
* Atomically sets the value of @ptr to @new_val.
*/
-static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val)
-{
- atomic64_xchg(ptr, new_val);
-}
+extern void atomic64_set(atomic64_t *ptr, u64 new_val);
/**
* atomic64_read - read atomic64 variable
*
* Atomically reads the value of @ptr and returns it.
*/
-static inline unsigned long long atomic64_read(atomic64_t *ptr)
-{
- unsigned long long curr_val;
-
- do {
- curr_val = __atomic64_read(ptr);
- } while (atomic64_cmpxchg(ptr, curr_val, curr_val) != curr_val);
-
- return curr_val;
-}
+extern u64 atomic64_read(atomic64_t *ptr);
/**
* atomic64_add_return - add and return
*
* Atomically adds @delta to @ptr and returns @delta + *@ptr
*/
-static inline unsigned long long
-atomic64_add_return(unsigned long long delta, atomic64_t *ptr)
-{
- unsigned long long old_val, new_val;
-
- do {
- old_val = atomic_read(ptr);
- new_val = old_val + delta;
-
- } while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
-
- return new_val;
-}
-
-static inline long atomic64_sub_return(unsigned long long delta, atomic64_t *ptr)
-{
- return atomic64_add_return(-delta, ptr);
-}
+extern u64 atomic64_add_return(u64 delta, atomic64_t *ptr);
-static inline long atomic64_inc_return(atomic64_t *ptr)
-{
- return atomic64_add_return(1, ptr);
-}
-
-static inline long atomic64_dec_return(atomic64_t *ptr)
-{
- return atomic64_sub_return(1, ptr);
-}
+/*
+ * Other variants with different arithmetic operators:
+ */
+extern u64 atomic64_sub_return(u64 delta, atomic64_t *ptr);
+extern u64 atomic64_inc_return(atomic64_t *ptr);
+extern u64 atomic64_dec_return(atomic64_t *ptr);
/**
* atomic64_add - add integer to atomic64 variable
*
* Atomically adds @delta to @ptr.
*/
-static inline void atomic64_add(unsigned long long delta, atomic64_t *ptr)
-{
- atomic64_add_return(delta, ptr);
-}
+extern void atomic64_add(u64 delta, atomic64_t *ptr);
/**
* atomic64_sub - subtract the atomic64 variable
*
* Atomically subtracts @delta from @ptr.
*/
-static inline void atomic64_sub(unsigned long long delta, atomic64_t *ptr)
-{
- atomic64_add(-delta, ptr);
-}
+extern void atomic64_sub(u64 delta, atomic64_t *ptr);
/**
* atomic64_sub_and_test - subtract value from variable and test result
* true if the result is zero, or false for all
* other cases.
*/
-static inline int
-atomic64_sub_and_test(unsigned long long delta, atomic64_t *ptr)
-{
- unsigned long long old_val = atomic64_sub_return(delta, ptr);
-
- return old_val == 0;
-}
+extern int atomic64_sub_and_test(u64 delta, atomic64_t *ptr);
/**
* atomic64_inc - increment atomic64 variable
*
* Atomically increments @ptr by 1.
*/
-static inline void atomic64_inc(atomic64_t *ptr)
-{
- atomic64_add(1, ptr);
-}
+extern void atomic64_inc(atomic64_t *ptr);
/**
* atomic64_dec - decrement atomic64 variable
*
* Atomically decrements @ptr by 1.
*/
-static inline void atomic64_dec(atomic64_t *ptr)
-{
- atomic64_sub(1, ptr);
-}
+extern void atomic64_dec(atomic64_t *ptr);
/**
* atomic64_dec_and_test - decrement and test
* returns true if the result is 0, or false for all other
* cases.
*/
-static inline int atomic64_dec_and_test(atomic64_t *ptr)
-{
- return atomic64_sub_and_test(1, ptr);
-}
+extern int atomic64_dec_and_test(atomic64_t *ptr);
/**
* atomic64_inc_and_test - increment and test
* and returns true if the result is zero, or false for all
* other cases.
*/
-static inline int atomic64_inc_and_test(atomic64_t *ptr)
-{
- return atomic64_sub_and_test(-1, ptr);
-}
+extern int atomic64_inc_and_test(atomic64_t *ptr);
/**
* atomic64_add_negative - add and test if negative
* if the result is negative, or false when
* result is greater than or equal to zero.
*/
-static inline int
-atomic64_add_negative(unsigned long long delta, atomic64_t *ptr)
-{
- long long old_val = atomic64_add_return(delta, ptr);
-
- return old_val < 0;
-}
+extern int atomic64_add_negative(u64 delta, atomic64_t *ptr);
#include <asm-generic/atomic-long.h>
#endif /* _ASM_X86_ATOMIC_32_H */
--- /dev/null
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <asm/processor.h>
+#include <asm/cmpxchg.h>
+#include <asm/atomic.h>
+
+static inline u64 cmpxchg8b(u64 *ptr, u64 old, u64 new)
+{
+ asm volatile(
+
+ LOCK_PREFIX "cmpxchg8b (%[ptr])\n"
+
+ : "=A" (old)
+
+ : [ptr] "D" (ptr),
+ "A" (old),
+ "b" (ll_low(new)),
+ "c" (ll_high(new))
+
+ : "memory");
+
+ return old;
+}
+
+u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old_val, u64 new_val)
+{
+ return cmpxchg8b(&ptr->counter, old_val, new_val);
+}
+
+/**
+ * atomic64_xchg - xchg atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ * @new_val: value to assign
+ *
+ * Atomically xchgs the value of @ptr to @new_val and returns
+ * the old value.
+ */
+
+u64 atomic64_xchg(atomic64_t *ptr, u64 new_val)
+{
+ u64 old_val;
+
+ do {
+ old_val = atomic_read(ptr);
+ } while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
+
+ return old_val;
+}
+
+/**
+ * atomic64_set - set atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ * @new_val: value to assign
+ *
+ * Atomically sets the value of @ptr to @new_val.
+ */
+void atomic64_set(atomic64_t *ptr, u64 new_val)
+{
+ atomic64_xchg(ptr, new_val);
+}
+
+/**
+ * atomic64_read - read atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically reads the value of @ptr and returns it.
+ */
+u64 atomic64_read(atomic64_t *ptr)
+{
+ u64 curr_val;
+
+ do {
+ curr_val = __atomic64_read(ptr);
+ } while (atomic64_cmpxchg(ptr, curr_val, curr_val) != curr_val);
+
+ return curr_val;
+}
+
+/**
+ * atomic64_add_return - add and return
+ * @delta: integer value to add
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically adds @delta to @ptr and returns @delta + *@ptr
+ */
+u64 atomic64_add_return(u64 delta, atomic64_t *ptr)
+{
+ u64 old_val, new_val;
+
+ do {
+ old_val = atomic_read(ptr);
+ new_val = old_val + delta;
+
+ } while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
+
+ return new_val;
+}
+
+u64 atomic64_sub_return(u64 delta, atomic64_t *ptr)
+{
+ return atomic64_add_return(-delta, ptr);
+}
+
+u64 atomic64_inc_return(atomic64_t *ptr)
+{
+ return atomic64_add_return(1, ptr);
+}
+
+u64 atomic64_dec_return(atomic64_t *ptr)
+{
+ return atomic64_sub_return(1, ptr);
+}
+
+/**
+ * atomic64_add - add integer to atomic64 variable
+ * @delta: integer value to add
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically adds @delta to @ptr.
+ */
+void atomic64_add(u64 delta, atomic64_t *ptr)
+{
+ atomic64_add_return(delta, ptr);
+}
+
+/**
+ * atomic64_sub - subtract the atomic64 variable
+ * @delta: integer value to subtract
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically subtracts @delta from @ptr.
+ */
+void atomic64_sub(u64 delta, atomic64_t *ptr)
+{
+ atomic64_add(-delta, ptr);
+}
+
+/**
+ * atomic64_sub_and_test - subtract value from variable and test result
+ * @delta: integer value to subtract
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically subtracts @delta from @ptr and returns
+ * true if the result is zero, or false for all
+ * other cases.
+ */
+int atomic64_sub_and_test(u64 delta, atomic64_t *ptr)
+{
+ u64 old_val = atomic64_sub_return(delta, ptr);
+
+ return old_val == 0;
+}
+
+/**
+ * atomic64_inc - increment atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically increments @ptr by 1.
+ */
+void atomic64_inc(atomic64_t *ptr)
+{
+ atomic64_add(1, ptr);
+}
+
+/**
+ * atomic64_dec - decrement atomic64 variable
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically decrements @ptr by 1.
+ */
+void atomic64_dec(atomic64_t *ptr)
+{
+ atomic64_sub(1, ptr);
+}
+
+/**
+ * atomic64_dec_and_test - decrement and test
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically decrements @ptr by 1 and
+ * returns true if the result is 0, or false for all other
+ * cases.
+ */
+int atomic64_dec_and_test(atomic64_t *ptr)
+{
+ return atomic64_sub_and_test(1, ptr);
+}
+
+/**
+ * atomic64_inc_and_test - increment and test
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically increments @ptr by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+int atomic64_inc_and_test(atomic64_t *ptr)
+{
+ return atomic64_sub_and_test(-1, ptr);
+}
+
+/**
+ * atomic64_add_negative - add and test if negative
+ * @delta: integer value to add
+ * @ptr: pointer to type atomic64_t
+ *
+ * Atomically adds @delta to @ptr and returns true
+ * if the result is negative, or false when
+ * result is greater than or equal to zero.
+ */
+int atomic64_add_negative(u64 delta, atomic64_t *ptr)
+{
+ long long old_val = atomic64_add_return(delta, ptr);
+
+ return old_val < 0;
+}
git.openpandora.org / pandora-kernel.git / commitdiff