[openib-general] new sparse warnings

[Roland Dreier]

I'm puzzled by that sparse warning.  I get no complaint on i386, and
the line in question seems to be

	if (put_user(agent_id,
		     (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) {

which I believe is correctly annotated.  A quick glance at <asm-x86_64/uaccess.h>
shows the definition of put_user() to be way to obfuscated to
understand quickly but my first guess would be that there is some
subtle difference between the i386 and x86_64 versions that triggers
the warning.

 - R.