[POWERPC] atomic.h: Add atomic64 cmpxchg, xchg and add_unless to powerpc (41806ef4) · Commits · e / devices / android_kernel_teracube_emerald

include/asm-powerpc/atomic.h

+39 −1

Original line number	Diff line number	Diff line
		@@ -165,7 +165,8 @@ static __inline__ int atomic_dec_return(atomic_t *v)
		return t;
		}

		#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
		#define atomic_cmpxchg(v, o, n) \
		((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
		#define atomic_xchg(v, new) (xchg(&((v)->counter), new))

		/**
		@@ -413,6 +414,43 @@ static __inline__ long atomic64_dec_if_positive(atomic64_t *v)
		return t;
		}

		#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 t;

		__asm__ __volatile__ (
		LWSYNC_ON_SMP
		"1: ldarx %0,0,%1 # atomic_add_unless\n\
		cmpd 0,%0,%3 \n\
		beq- 2f \n\
		add %0,%2,%0 \n"
		" stdcx. %0,0,%1 \n\
		bne- 1b \n"
		ISYNC_ON_SMP
		" subf %0,%2,%0 \n\
		2:"
		: "=&r" (t)
		: "r" (&v->counter), "r" (a), "r" (u)
		: "cc", "memory");

		return t != u;
		}

		#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)

		#endif /* __powerpc64__ */

		#include <asm-generic/atomic.h>