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, 67 insertions, 0 deletions

diff --git a/kernel/fs/minix/itree_v1.c b/kernel/fs/minix/itree_v1.c
new file mode 100644
index 000000000..282e15ad8
--- /dev/null
+++ b/kernel/fs/minix/itree_v1.c
@@ -0,0 +1,67 @@
+#include <linux/buffer_head.h>
+#include <linux/slab.h>
+#include "minix.h"
+
+enum {DEPTH = 3, DIRECT = 7};	/* Only double indirect */
+
+typedef u16 block_t;	/* 16 bit, host order */
+
+static inline unsigned long block_to_cpu(block_t n)
+{
+	return n;
+}
+
+static inline block_t cpu_to_block(unsigned long n)
+{
+	return n;
+}
+
+static inline block_t *i_data(struct inode *inode)
+{
+	return (block_t *)minix_i(inode)->u.i1_data;
+}
+
+static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
+{
+	int n = 0;
+	char b[BDEVNAME_SIZE];
+
+	if (block < 0) {
+		printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
+			block, bdevname(inode->i_sb->s_bdev, b));
+	} else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) {
+		if (printk_ratelimit())
+			printk("MINIX-fs: block_to_path: "
+			       "block %ld too big on dev %s\n",
+				block, bdevname(inode->i_sb->s_bdev, b));
+	} else if (block < 7) {
+		offsets[n++] = block;
+	} else if ((block -= 7) < 512) {
+		offsets[n++] = 7;
+		offsets[n++] = block;
+	} else {
+		block -= 512;
+		offsets[n++] = 8;
+		offsets[n++] = block>>9;
+		offsets[n++] = block & 511;
+	}
+	return n;
+}
+
+#include "itree_common.c"
+
+int V1_minix_get_block(struct inode * inode, long block,
+			struct buffer_head *bh_result, int create)
+{
+	return get_block(inode, block, bh_result, create);
+}
+
+void V1_minix_truncate(struct inode * inode)
+{
+	truncate(inode);
+}
+
+unsigned V1_minix_blocks(loff_t size, struct super_block *sb)
+{
+	return nblocks(size, sb);
+}