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| author | Peter Zijlstra <peterz@infradead.org> | 2013-10-09 10:24:48 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-09 14:48:27 +0200 |
| commit | 3354781a2184380046c8dd19144628d3c33991e6 (patch) | |
| tree | 013a9f5584e5e4518374db44a20385ca062fb985 | |
| parent | 2739d3eef3a93a92c366a3a0bb85a0afe09e8b8c (diff) | |
| download | blackbird-op-linux-3354781a2184380046c8dd19144628d3c33991e6.tar.gz blackbird-op-linux-3354781a2184380046c8dd19144628d3c33991e6.zip | |
sched/numa: Reflow task_numa_group() to avoid a compiler warning
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>
| -rw-r--r-- | kernel/sched/fair.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index e9149305c5fa..803e343d7c89 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -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) |
