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sched/numa: Reflow task_numa_group() to avoid a compiler warning

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Reflow the function a bit because GCC gets confused:

  kernel/sched/fair.c: In function ‘task_numa_fault’:
  kernel/sched/fair.c:1448:3: warning: ‘my_grp’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  kernel/sched/fair.c:1463:27: note: ‘my_grp’ was declared here

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-6ebt6x7u64pbbonq1khqu2z9@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2013-10-09 10:24:48 +02:00 committed by Ingo Molnar
parent 2739d3eef3
commit 3354781a21
1 changed files with 11 additions and 7 deletions
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18
kernel/sched/fair.c
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@ -1493,28 +1493,28 @@ static void task_numa_group(struct task_struct *p, int cpupid, int flags,
tsk = ACCESS_ONCE(cpu_rq(cpu)->curr);
if (!cpupid_match_pid(tsk, cpupid))
goto unlock;
goto no_join;
grp = rcu_dereference(tsk->numa_group);
if (!grp)
goto unlock;
goto no_join;
my_grp = p->numa_group;
if (grp == my_grp)
goto unlock;
goto no_join;
/*
* Only join the other group if its bigger; if we're the bigger group,
* the other task will join us.
*/
if (my_grp->nr_tasks > grp->nr_tasks)
goto unlock;
goto no_join;
/*
* Tie-break on the grp address.
*/
if (my_grp->nr_tasks == grp->nr_tasks && my_grp > grp)
goto unlock;
goto no_join;
/* Always join threads in the same process. */
if (tsk->mm == current->mm)
@ -1528,9 +1528,8 @@ static void task_numa_group(struct task_struct *p, int cpupid, int flags,
*priv = !join;
if (join && !get_numa_group(grp))
join = false;
goto no_join;
unlock:
rcu_read_unlock();
if (!join)
@ -1555,6 +1554,11 @@ unlock:
rcu_assign_pointer(p->numa_group, grp);
put_numa_group(my_grp);
return;
no_join:
rcu_read_unlock();
return;
}
void task_numa_free(struct task_struct *p)