huge_zero_refcount 62 mm/huge_memory.c static atomic_t huge_zero_refcount; huge_zero_refcount 84 mm/huge_memory.c if (likely(atomic_inc_not_zero(&huge_zero_refcount))) huge_zero_refcount 102 mm/huge_memory.c atomic_set(&huge_zero_refcount, 2); huge_zero_refcount 113 mm/huge_memory.c BUG_ON(atomic_dec_and_test(&huge_zero_refcount)); huge_zero_refcount 140 mm/huge_memory.c return atomic_read(&huge_zero_refcount) == 1 ? HPAGE_PMD_NR : 0; huge_zero_refcount 146 mm/huge_memory.c if (atomic_cmpxchg(&huge_zero_refcount, 1, 0) == 1) {