6962841780
Added allocation retry loop in alloc_pvo_entry(), to wait for memory to become available if the caller specifies the M_WAITOK flag. Also, the loop in moa64_enter() was removed, as moea64_pvo_enter() never returns ENOMEM. It is alloc_pvo_entry() memory allocation that can fail and must be retried. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D21035