1 files changed, 47 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/jump_label.h b/arch/powerpc/include/asm/jump_label.h
new file mode 100644
index 000000000000..1f780b95c0f0
--- /dev/null
+++ b/arch/powerpc/include/asm/jump_label.h
@@ -0,0 +1,47 @@
+#ifndef _ASM_POWERPC_JUMP_LABEL_H
+#define _ASM_POWERPC_JUMP_LABEL_H
+
+/*
+ * Copyright 2010 Michael Ellerman, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/types.h>
+
+#include <asm/feature-fixups.h>
+
+#define JUMP_ENTRY_TYPE         stringify_in_c(FTR_ENTRY_LONG)
+#define JUMP_LABEL_NOP_SIZE     4
+
+static __always_inline bool arch_static_branch(struct jump_label_key *key)
+{
+        asm goto("1:\n\t"
+                 "nop\n\t"
+                 ".pushsection __jump_table,  \"aw\"\n\t"
+                 ".align 4\n\t"
+                 JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t"
+                 ".popsection \n\t"
+                 : :  "i" (key) : : l_yes);
+        return false;
+l_yes:
+        return true;
+}
+
+#ifdef CONFIG_PPC64
+typedef u64 jump_label_t;
+#else
+typedef u32 jump_label_t;
+#endif
+
+struct jump_entry {
+        jump_label_t code;
+        jump_label_t target;
+        jump_label_t key;
+        jump_label_t pad;
+};
+
+#endif /* _ASM_POWERPC_JUMP_LABEL_H */