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, 74 insertions, 0 deletions

diff --git a/kernel/arch/m68k/include/asm/thread_info.h b/kernel/arch/m68k/include/asm/thread_info.h
new file mode 100644
index 000000000..cee13c2e5
--- /dev/null
+++ b/kernel/arch/m68k/include/asm/thread_info.h
@@ -0,0 +1,74 @@
+#ifndef _ASM_M68K_THREAD_INFO_H
+#define _ASM_M68K_THREAD_INFO_H
+
+#include <asm/types.h>
+#include <asm/page.h>
+#include <asm/segment.h>
+
+/*
+ * On machines with 4k pages we default to an 8k thread size, though we
+ * allow a 4k with config option. Any other machine page size then
+ * the thread size must match the page size (which is 8k and larger here).
+ */
+#if PAGE_SHIFT < 13
+#ifdef CONFIG_4KSTACKS
+#define THREAD_SIZE	4096
+#else
+#define THREAD_SIZE	8192
+#endif
+#else
+#define THREAD_SIZE	PAGE_SIZE
+#endif
+#define THREAD_SIZE_ORDER	((THREAD_SIZE / PAGE_SIZE) - 1)
+
+#ifndef __ASSEMBLY__
+
+struct thread_info {
+	struct task_struct	*task;		/* main task structure */
+	unsigned long		flags;
+	mm_segment_t		addr_limit;	/* thread address space */
+	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
+	__u32			cpu;		/* should always be 0 on m68k */
+	unsigned long		tp_value;	/* thread pointer */
+};
+#endif /* __ASSEMBLY__ */
+
+#define INIT_THREAD_INFO(tsk)			\
+{						\
+	.task		= &tsk,			\
+	.addr_limit	= KERNEL_DS,		\
+	.preempt_count	= INIT_PREEMPT_COUNT,	\
+}
+
+#define init_stack		(init_thread_union.stack)
+
+#ifndef __ASSEMBLY__
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+	struct thread_info *ti;
+	__asm__(
+		"move.l %%sp, %0 \n\t"
+		"and.l  %1, %0"
+		: "=&d"(ti)
+		: "di" (~(THREAD_SIZE-1))
+		);
+	return ti;
+}
+#endif
+
+#define init_thread_info	(init_thread_union.thread_info)
+
+/* entry.S relies on these definitions!
+ * bits 0-7 are tested at every exception exit
+ * bits 8-15 are also tested at syscall exit
+ */
+#define TIF_NOTIFY_RESUME	5	/* callback before returning to user */
+#define TIF_SIGPENDING		6	/* signal pending */
+#define TIF_NEED_RESCHED	7	/* rescheduling necessary */
+#define TIF_DELAYED_TRACE	14	/* single step a syscall */
+#define TIF_SYSCALL_TRACE	15	/* syscall trace active */
+#define TIF_MEMDIE		16	/* is terminating due to OOM killer */
+#define TIF_RESTORE_SIGMASK	18	/* restore signal mask in do_signal */
+
+#endif	/* _ASM_M68K_THREAD_INFO_H */