Re: [PATCH v9 11/12] x86, mpx: cleanup unused bound tables

[Dave Hansen]

Instead of all of these games with dropping and reacquiring mmap_sem and
adding other locks, or deferring the work, why don't we just do a
get_user_pages()?  Something along the lines of:

while (1) {
	ret = cmpxchg(addr)
	if (!ret)
		break;
	if (ret == -EFAULT)
		get_user_pages(addr);
}

Does anybody see a problem with that?
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