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Groups > linux.kernel > #1548381

[PATCH 1/3] cgroup: cosmetic update to cgroup_taskset_add()

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject [PATCH 1/3] cgroup: cosmetic update to cgroup_taskset_add()
Date 2016-12-29 23:20 +0100
Message-ID <sTRdg-42p-15@gated-at.bofh.it> (permalink)
References <sTRdf-42p-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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cgroup_taskset_add() was using list_add_tail() when for source csets
but list_move_tail() for destination.  As the operations are gated by
list_empty() test, list_move_tail() is equivalent to list_add_tail()
here.  Use list_add_tail() too for destination csets too.

This doesn't cause any functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
 kernel/cgroup/cgroup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index d9d82e9..aed492e 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1980,8 +1980,8 @@ static void cgroup_taskset_add(struct task_struct *task,
 	if (list_empty(&cset->mg_node))
 		list_add_tail(&cset->mg_node, &tset->src_csets);
 	if (list_empty(&cset->mg_dst_cset->mg_node))
-		list_move_tail(&cset->mg_dst_cset->mg_node,
-			       &tset->dst_csets);
+		list_add_tail(&cset->mg_dst_cset->mg_node,
+			      &tset->dst_csets);
 }
 
 /**
-- 
2.9.3

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[PATCHSET for-4.11] cgroup: avoid spurious identity ->*attach() invocations Tejun Heo <tj@kernel.org> - 2016-12-29 23:20 +0100
  [PATCH 1/3] cgroup: cosmetic update to cgroup_taskset_add() Tejun Heo <tj@kernel.org> - 2016-12-29 23:20 +0100
  [PATCH 3/3] cgroup: call subsys->*attach() only for subsystems which are actually affected by migration Tejun Heo <tj@kernel.org> - 2016-12-29 23:20 +0100
  [PATCH 2/3] cgroup: track migration context in cgroup_mgctx Tejun Heo <tj@kernel.org> - 2016-12-29 23:20 +0100

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