diff options
Diffstat (limited to 'mm/mempolicy.c')
| -rw-r--r-- | mm/mempolicy.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index b62cab575a84bb..3171f884d2459a 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1359,6 +1359,30 @@ restart: return 0; } +void mpol_shared_policy_init(struct shared_policy *info, int policy, + nodemask_t *policy_nodes) +{ + info->root = RB_ROOT; + spin_lock_init(&info->lock); + + if (policy != MPOL_DEFAULT) { + struct mempolicy *newpol; + + /* Falls back to MPOL_DEFAULT on any error */ + newpol = mpol_new(policy, policy_nodes); + if (!IS_ERR(newpol)) { + /* Create pseudo-vma that contains just the policy */ + struct vm_area_struct pvma; + + memset(&pvma, 0, sizeof(struct vm_area_struct)); + /* Policy covers entire file */ + pvma.vm_end = TASK_SIZE; + mpol_set_shared_policy(info, &pvma, newpol); + mpol_free(newpol); + } + } +} + int mpol_set_shared_policy(struct shared_policy *info, struct vm_area_struct *vma, struct mempolicy *npol) { |