[PATCH] adds st_blocks for [lf]stat() to ramfs

This makes ramfs support proper st_blocks accounting.

fs/ramfs/inode.c

@@ -40,6 +40,7 @@
 static struct super_operations ramfs_ops;
 static struct address_space_operations ramfs_aops;
 static struct file_operations ramfs_file_operations;
+static struct inode_operations ramfs_file_inode_operations;
 static struct inode_operations ramfs_dir_inode_operations;
 
 static struct backing_dev_info ramfs_backing_dev_info = {
@@ -66,6 +67,7 @@ static struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev
 			init_special_inode(inode, mode, dev);
 			break;
 		case S_IFREG:
+			inode->i_op = &ramfs_file_inode_operations;
 			inode->i_fop = &ramfs_file_operations;
 			break;
 		case S_IFDIR:
@@ -114,6 +116,27 @@ static int ramfs_create(struct inode *dir, struct dentry *dentry, int mode)
 	return ramfs_mknod(dir, dentry, mode | S_IFREG, 0);
 }
 
+static int ramfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+			 struct kstat *stat)
+{
+	struct inode *inode = dentry->d_inode;
+
+	stat->dev = inode->i_sb->s_dev;
+	stat->ino = inode->i_ino;
+	stat->mode = inode->i_mode;
+	stat->nlink = inode->i_nlink;
+	stat->uid = inode->i_uid;
+	stat->gid = inode->i_gid;
+	stat->rdev = kdev_t_to_nr(inode->i_rdev);
+	stat->atime = inode->i_atime;
+	stat->mtime = inode->i_mtime;
+	stat->ctime = inode->i_ctime;
+	stat->size = inode->i_size;
+	stat->blocks = inode->i_mapping->nrpages << (PAGE_CACHE_SHIFT - 9);
+	stat->blksize = inode->i_blksize;
+
+	return 0;
+}
 
 static int ramfs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
 {
@@ -147,6 +170,10 @@ static struct file_operations ramfs_file_operations = {
 	.sendfile	= generic_file_sendfile,
 };
 
+static struct inode_operations ramfs_file_inode_operations = {
+	.getattr	= ramfs_getattr,
+};
+
 static struct inode_operations ramfs_dir_inode_operations = {
 	.create		= ramfs_create,
 	.lookup		= simple_lookup,