Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/kernel/arch/blackfin/include/asm/ptrace.h b/kernel/arch/blackfin/include/asm/ptrace.h
new file mode 100644
index 000000000..c00491594
--- /dev/null
+++ b/kernel/arch/blackfin/include/asm/ptrace.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2004-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+#ifndef _BFIN_PTRACE_H
+#define _BFIN_PTRACE_H
+
+#include <uapi/asm/ptrace.h>
+
+#ifndef __ASSEMBLY__
+
+/* user_mode returns true if only one bit is set in IPEND, other than the
+   master interrupt enable.  */
+#define user_mode(regs) (!(((regs)->ipend & ~0x10) & (((regs)->ipend & ~0x10) - 1)))
+
+#define arch_has_single_step()	(1)
+/* common code demands this function */
+#define ptrace_disable(child) user_disable_single_step(child)
+#define current_user_stack_pointer() rdusp()
+
+extern int is_user_addr_valid(struct task_struct *child,
+			      unsigned long start, unsigned long len);
+
+/*
+ * Get the address of the live pt_regs for the specified task.
+ * These are saved onto the top kernel stack when the process
+ * is not running.
+ *
+ * Note: if a user thread is execve'd from kernel space, the
+ * kernel stack will not be empty on entry to the kernel, so
+ * ptracing these tasks will fail.
+ */
+#define task_pt_regs(task) \
+	(struct pt_regs *) \
+	    ((unsigned long)task_stack_page(task) + \
+	     (THREAD_SIZE - sizeof(struct pt_regs)))
+
+#include <asm-generic/ptrace.h>
+
+#endif				/* __ASSEMBLY__ */
+#endif				/* _BFIN_PTRACE_H */