5 files changed, 2 insertions, 36 deletions

diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index cfe55dfca015..3c1b968da0ca 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -143,7 +143,6 @@ extern void numa_policy_init(void);
 extern void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new,
                                 enum mpol_rebind_step step);
 extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
-extern void mpol_fix_fork_child_flag(struct task_struct *p);
 
 extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
                                 unsigned long addr, gfp_t gfp_flags,
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 642477dd814a..6c70645eb3b6 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1851,7 +1851,6 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut,
 #define PF_SPREAD_SLAB  0x02000000      /* Spread some slab caches over cpuset */
 #define PF_NO_SETAFFINITY 0x04000000    /* Userland is not allowed to meddle with cpus_allowed */
 #define PF_MCE_EARLY    0x08000000      /* Early kill for mce process policy */
-#define PF_MEMPOLICY    0x10000000      /* Non-default NUMA mempolicy */
 #define PF_MUTEX_TESTER 0x20000000      /* Thread belongs to the rt mutex tester */
 #define PF_FREEZER_SKIP 0x40000000      /* Freezer should not count it as freezable */
 #define PF_SUSPEND_TASK 0x80000000      /* this thread called freeze_processes and should not be frozen */
diff --git a/kernel/fork.c b/kernel/fork.c
index c777964c0662..e905e9c6b224 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1276,7 +1276,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                 p->mempolicy = NULL;
                 goto bad_fork_cleanup_threadgroup_lock;
         }
-        mpol_fix_fork_child_flag(p);
 #endif
 #ifdef CONFIG_CPUSETS
         p->cpuset_mem_spread_rotor = NUMA_NO_NODE;
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 0ad0ba31979f..78e1472933ea 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -795,36 +795,6 @@ static int mbind_range(struct mm_struct *mm, unsigned long start,
         return err;
 }
 
-/*
- * Update task->flags PF_MEMPOLICY bit: set iff non-default
- * mempolicy.  Allows more rapid checking of this (combined perhaps
- * with other PF_* flag bits) on memory allocation hot code paths.
- *
- * If called from outside this file, the task 'p' should -only- be
- * a newly forked child not yet visible on the task list, because
- * manipulating the task flags of a visible task is not safe.
- *
- * The above limitation is why this routine has the funny name
- * mpol_fix_fork_child_flag().
- *
- * It is also safe to call this with a task pointer of current,
- * which the static wrapper mpol_set_task_struct_flag() does,
- * for use within this file.
- */
-
-void mpol_fix_fork_child_flag(struct task_struct *p)
-{
-        if (p->mempolicy)
-                p->flags |= PF_MEMPOLICY;
-        else
-                p->flags &= ~PF_MEMPOLICY;
-}
-
-static void mpol_set_task_struct_flag(void)
-{
-        mpol_fix_fork_child_flag(current);
-}
-
 /* Set the process memory policy */
 static long do_set_mempolicy(unsigned short mode, unsigned short flags,
                              nodemask_t *nodes)
@@ -861,7 +831,6 @@ static long do_set_mempolicy(unsigned short mode, unsigned short flags,
         }
         old = current->mempolicy;
         current->mempolicy = new;
-        mpol_set_task_struct_flag();
         if (new && new->mode == MPOL_INTERLEAVE &&
             nodes_weight(new->v.nodes))
                 current->il_next = first_node(new->v.nodes);
diff --git a/mm/slab.c b/mm/slab.c
index 4b17f4c2e92d..3db4cb06e32e 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3027,7 +3027,7 @@ out:
 
 #ifdef CONFIG_NUMA
 /*
- * Try allocating on another node if PF_SPREAD_SLAB|PF_MEMPOLICY.
+ * Try allocating on another node if PF_SPREAD_SLAB is a mempolicy is set.
  *
  * If we are in_interrupt, then process context, including cpusets and
  * mempolicy, may not apply and should not be used for allocation policy.
@@ -3259,7 +3259,7 @@ __do_cache_alloc(struct kmem_cache *cache, gfp_t flags)
 {
         void *objp;
 
-        if (unlikely(current->flags & (PF_SPREAD_SLAB | PF_MEMPOLICY))) {
+        if (current->mempolicy || unlikely(current->flags & PF_SPREAD_SLAB)) {
                 objp = alternate_node_alloc(cache, flags);
                 if (objp)
                         goto out;