pmd_clear_savedwrite 1092 arch/powerpc/include/asm/book3s/64/pgtable.h #define pmd_clear_savedwrite(pmd)	pte_pmd(pte_clear_savedwrite(pmd_pte(pmd)))
pmd_clear_savedwrite  250 include/asm-generic/pgtable.h #define pmd_clear_savedwrite pmd_wrprotect