rename generic_setattr

Despite its name it's now a generic implementation of ->setattr, but
rather a helper to copy attributes from a struct iattr to the inode.
Rename it to setattr_copy to reflect this fact.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b347b2d..8ebb5f0 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2393,7 +2393,7 @@
 extern int inode_change_ok(const struct inode *, struct iattr *);
 extern int inode_newsize_ok(const struct inode *, loff_t offset);
 extern int __must_check inode_setattr(struct inode *, const struct iattr *);
-extern void generic_setattr(struct inode *inode, const struct iattr *attr);
+extern void setattr_copy(struct inode *inode, const struct iattr *attr);
 
 extern void file_update_time(struct file *file);