1 files changed, 59 insertions, 0 deletions

diff --git a/include/asm-s390/local.h b/include/asm-s390/local.h
new file mode 100644
index 000000000000..cf8189009c30
--- /dev/null
+++ b/include/asm-s390/local.h
@@ -0,0 +1,59 @@
+#ifndef _ASM_LOCAL_H
+#define _ASM_LOCAL_H
+
+#include <linux/config.h>
+#include <linux/percpu.h>
+#include <asm/atomic.h>
+
+#ifndef __s390x__
+
+typedef atomic_t local_t;
+
+#define LOCAL_INIT(i)   ATOMIC_INIT(i)
+#define local_read(v)   atomic_read(v)
+#define local_set(v,i)  atomic_set(v,i)
+
+#define local_inc(v)    atomic_inc(v)
+#define local_dec(v)    atomic_dec(v)
+#define local_add(i, v) atomic_add(i, v)
+#define local_sub(i, v) atomic_sub(i, v)
+
+#else
+
+typedef atomic64_t local_t;
+
+#define LOCAL_INIT(i)   ATOMIC64_INIT(i)
+#define local_read(v)   atomic64_read(v)
+#define local_set(v,i)  atomic64_set(v,i)
+
+#define local_inc(v)    atomic64_inc(v)
+#define local_dec(v)    atomic64_dec(v)
+#define local_add(i, v) atomic64_add(i, v)
+#define local_sub(i, v) atomic64_sub(i, v)
+
+#endif
+
+#define __local_inc(v)          ((v)->counter++)
+#define __local_dec(v)          ((v)->counter--)
+#define __local_add(i,v)        ((v)->counter+=(i))
+#define __local_sub(i,v)        ((v)->counter-=(i))
+
+/*
+ * Use these for per-cpu local_t variables: on some archs they are
+ * much more efficient than these naive implementations.  Note they take
+ * a variable, not an address.
+ */
+#define cpu_local_read(v)       local_read(&__get_cpu_var(v))
+#define cpu_local_set(v, i)     local_set(&__get_cpu_var(v), (i))
+
+#define cpu_local_inc(v)        local_inc(&__get_cpu_var(v))
+#define cpu_local_dec(v)        local_dec(&__get_cpu_var(v))
+#define cpu_local_add(i, v)     local_add((i), &__get_cpu_var(v))
+#define cpu_local_sub(i, v)     local_sub((i), &__get_cpu_var(v))
+
+#define __cpu_local_inc(v)      __local_inc(&__get_cpu_var(v))
+#define __cpu_local_dec(v)      __local_dec(&__get_cpu_var(v))
+#define __cpu_local_add(i, v)   __local_add((i), &__get_cpu_var(v))
+#define __cpu_local_sub(i, v)   __local_sub((i), &__get_cpu_var(v))
+
+#endif /* _ASM_LOCAL_H */