3 files changed, 181 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 6391a4a0709a..6a5b468edb4d 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1080,9 +1080,9 @@ void __init unflatten_device_tree(void)
 static int __init early_init_dt_scan_cpus(unsigned long node,
                                           const char *uname, int depth, void *data)
 {
-        char *type = of_get_flat_dt_prop(node, "device_type", NULL);
         u32 *prop;
-        unsigned long size = 0;
+        unsigned long size;
+        char *type = of_get_flat_dt_prop(node, "device_type", &size);
 
         /* We are scanning "cpu" nodes only */
         if (type == NULL || strcmp(type, "cpu") != 0)
@@ -1108,7 +1108,7 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 
 #ifdef CONFIG_ALTIVEC
         /* Check if we have a VMX and eventually update CPU features */
-        prop = (u32 *)of_get_flat_dt_prop(node, "ibm,vmx", &size);
+        prop = (u32 *)of_get_flat_dt_prop(node, "ibm,vmx", NULL);
         if (prop && (*prop) > 0) {
                 cur_cpu_spec->cpu_features |= CPU_FTR_ALTIVEC;
                 cur_cpu_spec->cpu_user_features |= PPC_FEATURE_HAS_ALTIVEC;
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index 1f338341d8f2..6a29f301436b 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -704,7 +704,6 @@ static void iseries_shared_idle(void)
 
 static void iseries_dedicated_idle(void)
 {
-        long oldval;
         set_thread_flag(TIF_POLLING_NRFLAG);
 
         while (1) {
diff --git a/include/asm-powerpc/atomic.h b/include/asm-powerpc/atomic.h
index c5b12fd2b46b..9c0b372a46e1 100644
--- a/include/asm-powerpc/atomic.h
+++ b/include/asm-powerpc/atomic.h
@@ -197,5 +197,183 @@ static __inline__ int atomic_dec_if_positive(atomic_t *v)
 #define smp_mb__before_atomic_inc()     smp_mb()
 #define smp_mb__after_atomic_inc()      smp_mb()
 
+#ifdef __powerpc64__
+
+typedef struct { volatile long counter; } atomic64_t;
+
+#define ATOMIC64_INIT(i)        { (i) }
+
+#define atomic64_read(v)        ((v)->counter)
+#define atomic64_set(v,i)       (((v)->counter) = (i))
+
+static __inline__ void atomic64_add(long a, atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+"1:     ldarx   %0,0,%3         # atomic64_add\n\
+        add     %0,%2,%0\n\
+        stdcx.  %0,0,%3 \n\
+        bne-    1b"
+        : "=&r" (t), "=m" (v->counter)
+        : "r" (a), "r" (&v->counter), "m" (v->counter)
+        : "cc");
+}
+
+static __inline__ long atomic64_add_return(long a, atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+        EIEIO_ON_SMP
+"1:     ldarx   %0,0,%2         # atomic64_add_return\n\
+        add     %0,%1,%0\n\
+        stdcx.  %0,0,%2 \n\
+        bne-    1b"
+        ISYNC_ON_SMP
+        : "=&r" (t)
+        : "r" (a), "r" (&v->counter)
+        : "cc", "memory");
+
+        return t;
+}
+
+#define atomic64_add_negative(a, v)     (atomic64_add_return((a), (v)) < 0)
+
+static __inline__ void atomic64_sub(long a, atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+"1:     ldarx   %0,0,%3         # atomic64_sub\n\
+        subf    %0,%2,%0\n\
+        stdcx.  %0,0,%3 \n\
+        bne-    1b"
+        : "=&r" (t), "=m" (v->counter)
+        : "r" (a), "r" (&v->counter), "m" (v->counter)
+        : "cc");
+}
+
+static __inline__ long atomic64_sub_return(long a, atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+        EIEIO_ON_SMP
+"1:     ldarx   %0,0,%2         # atomic64_sub_return\n\
+        subf    %0,%1,%0\n\
+        stdcx.  %0,0,%2 \n\
+        bne-    1b"
+        ISYNC_ON_SMP
+        : "=&r" (t)
+        : "r" (a), "r" (&v->counter)
+        : "cc", "memory");
+
+        return t;
+}
+
+static __inline__ void atomic64_inc(atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+"1:     ldarx   %0,0,%2         # atomic64_inc\n\
+        addic   %0,%0,1\n\
+        stdcx.  %0,0,%2 \n\
+        bne-    1b"
+        : "=&r" (t), "=m" (v->counter)
+        : "r" (&v->counter), "m" (v->counter)
+        : "cc");
+}
+
+static __inline__ long atomic64_inc_return(atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+        EIEIO_ON_SMP
+"1:     ldarx   %0,0,%1         # atomic64_inc_return\n\
+        addic   %0,%0,1\n\
+        stdcx.  %0,0,%1 \n\
+        bne-    1b"
+        ISYNC_ON_SMP
+        : "=&r" (t)
+        : "r" (&v->counter)
+        : "cc", "memory");
+
+        return t;
+}
+
+/*
+ * atomic64_inc_and_test - increment and test
+ * @v: pointer of type atomic64_t
+ *
+ * Atomically increments @v by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0)
+
+static __inline__ void atomic64_dec(atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+"1:     ldarx   %0,0,%2         # atomic64_dec\n\
+        addic   %0,%0,-1\n\
+        stdcx.  %0,0,%2\n\
+        bne-    1b"
+        : "=&r" (t), "=m" (v->counter)
+        : "r" (&v->counter), "m" (v->counter)
+        : "cc");
+}
+
+static __inline__ long atomic64_dec_return(atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+        EIEIO_ON_SMP
+"1:     ldarx   %0,0,%1         # atomic64_dec_return\n\
+        addic   %0,%0,-1\n\
+        stdcx.  %0,0,%1\n\
+        bne-    1b"
+        ISYNC_ON_SMP
+        : "=&r" (t)
+        : "r" (&v->counter)
+        : "cc", "memory");
+
+        return t;
+}
+
+#define atomic64_sub_and_test(a, v)     (atomic64_sub_return((a), (v)) == 0)
+#define atomic64_dec_and_test(v)        (atomic64_dec_return((v)) == 0)
+
+/*
+ * Atomically test *v and decrement if it is greater than 0.
+ * The function returns the old value of *v minus 1.
+ */
+static __inline__ long atomic64_dec_if_positive(atomic64_t *v)
+{
+        long t;
+
+        __asm__ __volatile__(
+        EIEIO_ON_SMP
+"1:     ldarx   %0,0,%1         # atomic64_dec_if_positive\n\
+        addic.  %0,%0,-1\n\
+        blt-    2f\n\
+        stdcx.  %0,0,%1\n\
+        bne-    1b"
+        ISYNC_ON_SMP
+        "\n\
+2:"     : "=&r" (t)
+        : "r" (&v->counter)
+        : "cc", "memory");
+
+        return t;
+}
+
+#endif /* __powerpc64__ */
+
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_ATOMIC_H_ */