From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: [PATCH 4/9] cgroup_freezer: trivial cleanups Date: Sat, 3 Nov 2012 01:38:30 -0700 Message-ID: <1351931915-1701-5-git-send-email-tj@kernel.org> References: <1351931915-1701-1-git-send-email-tj@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1351931915-1701-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, mhocko-AlSwsSmVLrQ@public.gmane.org, rjw-KKrjLPT3xs0@public.gmane.org Cc: linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Tejun Heo , cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-pm@vger.kernel.org * Clean-up indentation and line-breaks. Drop the invalid comment about freezer->lock. * Make all internal functions take @freezer instead of both @cgroup and @freezer. Signed-off-by: Tejun Heo --- kernel/cgroup_freezer.c | 41 +++++++++++++++++++---------------------- 1 file changed, 19 insertions(+), 22 deletions(-) diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c index bedefd9..975b3d8 100644 --- a/kernel/cgroup_freezer.c +++ b/kernel/cgroup_freezer.c @@ -29,17 +29,15 @@ enum freezer_state { }; struct freezer { - struct cgroup_subsys_state css; - enum freezer_state state; - spinlock_t lock; /* protects _writes_ to state */ + struct cgroup_subsys_state css; + enum freezer_state state; + spinlock_t lock; }; -static inline struct freezer *cgroup_freezer( - struct cgroup *cgroup) +static inline struct freezer *cgroup_freezer(struct cgroup *cgroup) { - return container_of( - cgroup_subsys_state(cgroup, freezer_subsys_id), - struct freezer, css); + return container_of(cgroup_subsys_state(cgroup, freezer_subsys_id), + struct freezer, css); } static inline struct freezer *task_freezer(struct task_struct *task) @@ -180,8 +178,9 @@ out: * migrated into or out of @cgroup, so we can't verify task states against * @freezer state here. See freezer_attach() for details. */ -static void update_if_frozen(struct cgroup *cgroup, struct freezer *freezer) +static void update_if_frozen(struct freezer *freezer) { + struct cgroup *cgroup = freezer->css.cgroup; struct cgroup_iter it; struct task_struct *task; @@ -211,12 +210,11 @@ notyet: static int freezer_read(struct cgroup *cgroup, struct cftype *cft, struct seq_file *m) { - struct freezer *freezer; + struct freezer *freezer = cgroup_freezer(cgroup); enum freezer_state state; - freezer = cgroup_freezer(cgroup); spin_lock_irq(&freezer->lock); - update_if_frozen(cgroup, freezer); + update_if_frozen(freezer); state = freezer->state; spin_unlock_irq(&freezer->lock); @@ -225,8 +223,9 @@ static int freezer_read(struct cgroup *cgroup, struct cftype *cft, return 0; } -static void freeze_cgroup(struct cgroup *cgroup, struct freezer *freezer) +static void freeze_cgroup(struct freezer *freezer) { + struct cgroup *cgroup = freezer->css.cgroup; struct cgroup_iter it; struct task_struct *task; @@ -236,8 +235,9 @@ static void freeze_cgroup(struct cgroup *cgroup, struct freezer *freezer) cgroup_iter_end(cgroup, &it); } -static void unfreeze_cgroup(struct cgroup *cgroup, struct freezer *freezer) +static void unfreeze_cgroup(struct freezer *freezer) { + struct cgroup *cgroup = freezer->css.cgroup; struct cgroup_iter it; struct task_struct *task; @@ -247,11 +247,9 @@ static void unfreeze_cgroup(struct cgroup *cgroup, struct freezer *freezer) cgroup_iter_end(cgroup, &it); } -static void freezer_change_state(struct cgroup *cgroup, +static void freezer_change_state(struct freezer *freezer, enum freezer_state goal_state) { - struct freezer *freezer = cgroup_freezer(cgroup); - /* also synchronizes against task migration, see freezer_attach() */ spin_lock_irq(&freezer->lock); @@ -260,13 +258,13 @@ static void freezer_change_state(struct cgroup *cgroup, if (freezer->state != CGROUP_THAWED) atomic_dec(&system_freezing_cnt); freezer->state = CGROUP_THAWED; - unfreeze_cgroup(cgroup, freezer); + unfreeze_cgroup(freezer); break; case CGROUP_FROZEN: if (freezer->state == CGROUP_THAWED) atomic_inc(&system_freezing_cnt); freezer->state = CGROUP_FREEZING; - freeze_cgroup(cgroup, freezer); + freeze_cgroup(freezer); break; default: BUG(); @@ -275,8 +273,7 @@ static void freezer_change_state(struct cgroup *cgroup, spin_unlock_irq(&freezer->lock); } -static int freezer_write(struct cgroup *cgroup, - struct cftype *cft, +static int freezer_write(struct cgroup *cgroup, struct cftype *cft, const char *buffer) { enum freezer_state goal_state; @@ -288,7 +285,7 @@ static int freezer_write(struct cgroup *cgroup, else return -EINVAL; - freezer_change_state(cgroup, goal_state); + freezer_change_state(cgroup_freezer(cgroup), goal_state); return 0; } -- 1.7.11.7