mpol_needs_cond_ref 128 include/linux/mempolicy.h if (mpol_needs_cond_ref(pol)) mpol_needs_cond_ref 1546 mm/mempolicy.c if (unlikely(mpol_needs_cond_ref(pol))) { mpol_needs_cond_ref 1637 mm/mempolicy.c if (!mpol_needs_cond_ref(frompol))