pmd_bad           192 include/asm-generic/pgtable.h 	if (unlikely(pmd_bad(*pmd))) {
pmd_bad          1064 mm/memory.c    	if (unlikely(pmd_bad(*pmd)))
pmd_bad          2858 mm/memory.c    	if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd)))