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

Dave Hansen
2014-11-06T21:50:03Z

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?