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Diffstat (limited to 'arch/powerpc/include/asm/current.h')
-rw-r--r--arch/powerpc/include/asm/current.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/current.h b/arch/powerpc/include/asm/current.h
new file mode 100644
index 000000000000..e2c7f06931e7
--- /dev/null
+++ b/arch/powerpc/include/asm/current.h
@@ -0,0 +1,40 @@
+#ifndef _ASM_POWERPC_CURRENT_H
+#define _ASM_POWERPC_CURRENT_H
+#ifdef __KERNEL__
+
+/*
+ * 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.
+ */
+
+struct task_struct;
+
+#ifdef __powerpc64__
+#include <linux/stddef.h>
+#include <asm/paca.h>
+
+static inline struct task_struct *get_current(void)
+{
+ struct task_struct *task;
+
+ __asm__ __volatile__("ld %0,%1(13)"
+ : "=r" (task)
+ : "i" (offsetof(struct paca_struct, __current)));
+
+ return task;
+}
+#define current get_current()
+
+#else
+
+/*
+ * We keep `current' in r2 for speed.
+ */
+register struct task_struct *current asm ("r2");
+
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_CURRENT_H */