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From: Arjan van de Ven <arjan@linux.intel.com>
Date: Sun, 21 Sep 2008 11:58:27 -0700
Subject: [PATCH] superreadahead patch

---
 fs/ext3/ioctl.c         |    3 +++
 fs/ext3/super.c         |    1 +
 include/linux/ext3_fs.h |    1 +
 include/linux/fs.h      |    2 ++
 4 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index 0d0c701..7e62d7d 100644
--- a/fs/ext3/ioctl.c
+++ b/fs/ext3/ioctl.c
@@ -286,6 +286,9 @@ group_add_out:
 		mnt_drop_write(filp->f_path.mnt);
 		return err;
 	}
+	case EXT3_IOC_INODE_JIFFIES: {
+		return inode->created_when;
+	}
 
 
 	default:
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 2845425..6a896a4 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -456,6 +456,7 @@ static struct inode *ext3_alloc_inode(struct super_block *sb)
 #endif
 	ei->i_block_alloc_info = NULL;
 	ei->vfs_inode.i_version = 1;
+	ei->vfs_inode.created_when = jiffies;
 	return &ei->vfs_inode;
 }
 
diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 36c5403..b409fa7 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -225,6 +225,7 @@ struct ext3_new_group_data {
 #endif
 #define EXT3_IOC_GETRSVSZ		_IOR('f', 5, long)
 #define EXT3_IOC_SETRSVSZ		_IOW('f', 6, long)
+#define EXT3_IOC_INODE_JIFFIES		_IOR('f', 19, long)
 
 /*
  * ioctl commands in 32 bit emulation
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c6455da..4ac846d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -655,6 +655,8 @@ struct inode {
 	void			*i_security;
 #endif
 	void			*i_private; /* fs or device private pointer */
+	
+	unsigned long		created_when; /* jiffies of creation time */
 };
 
 /*
-- 
1.5.5.1