From 3354781a2184380046c8dd19144628d3c33991e6 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 9 Oct 2013 10:24:48 +0200 Subject: [PATCH] sched/numa: Reflow task_numa_group() to avoid a compiler warning MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Link: http://lkml.kernel.org/n/tip-6ebt6x7u64pbbonq1khqu2z9@git.kernel.org Signed-off-by: Ingo Molnar --- kernel/sched/fair.c | 18 +++++++++++------- 1 file 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) -- 2.20.1