diff options
| author | Oleg Nesterov | 2014-10-09 15:27:43 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2014-10-09 22:25:55 -0400 |
| commit | f15ca78e33b0bb5acc0c5d9a5d5be3c55c4f0bb7 (patch) | |
| tree | 0fbf0b3ccedd33232dcd60d9f959509d4cc2cdf2 | |
| parent | 2386740d1add7bb5048c731dd1127a4e9911a3ed (diff) | |
mempolicy: change get_task_policy() to return default_policy rather than NULL
Every caller of get_task_policy() falls back to default_policy if it
returns NULL. Change get_task_policy() to do this.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mempolicy.c | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index c0c5d388046f..656db97584f0 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -126,22 +126,20 @@ static struct mempolicy preferred_node_policy[MAX_NUMNODES]; static struct mempolicy *get_task_policy(struct task_struct *p) { struct mempolicy *pol = p->mempolicy; + int node; - if (!pol) { - int node = numa_node_id(); + if (pol) + return pol; - if (node != NUMA_NO_NODE) { - pol = &preferred_node_policy[node]; - /* - * preferred_node_policy is not initialised early in - * boot - */ - if (!pol->mode) - pol = NULL; - } + node = numa_node_id(); + if (node != NUMA_NO_NODE) { + pol = &preferred_node_policy[node]; + /* preferred_node_policy is not initialised early in boot */ + if (pol->mode) + return pol; } - return pol; + return &default_policy; } static const struct mempolicy_operations { @@ -1644,14 +1642,14 @@ struct mempolicy *get_vma_policy(struct task_struct *task, mpol_get(pol); } } - if (!pol) - pol = &default_policy; + return pol; } bool vma_policy_mof(struct task_struct *task, struct vm_area_struct *vma) { struct mempolicy *pol = get_task_policy(task); + if (vma) { if (vma->vm_ops && vma->vm_ops->get_policy) { bool ret = false; @@ -1667,9 +1665,6 @@ bool vma_policy_mof(struct task_struct *task, struct vm_area_struct *vma) } } - if (!pol) - return default_policy.flags & MPOL_F_MOF; - return pol->flags & MPOL_F_MOF; } @@ -2077,7 +2072,7 @@ struct page *alloc_pages_current(gfp_t gfp, unsigned order) struct page *page; unsigned int cpuset_mems_cookie; - if (!pol || in_interrupt() || (gfp & __GFP_THISNODE)) + if (in_interrupt() || (gfp & __GFP_THISNODE)) pol = &default_policy; retry_cpuset: |