sched: style cleanups

style cleanup of various changes that were done recently.

no code changed:

      text    data     bss     dec     hex filename
     23680    2542      28   26250    668a sched.o.before
     23680    2542      28   26250    668a sched.o.after

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2007-12-05 15:46:09 +01:00
parent ce6bd420f4
commit 41a2d6cfa3

View File

@ -209,9 +209,8 @@ static inline struct task_group *task_group(struct task_struct *p)
tg = container_of(task_subsys_state(p, cpu_cgroup_subsys_id),
struct task_group, css);
#else
tg = &init_task_group;
tg = &init_task_group;
#endif
return tg;
}
@ -249,15 +248,16 @@ struct cfs_rq {
#ifdef CONFIG_FAIR_GROUP_SCHED
struct rq *rq; /* cpu runqueue to which this cfs_rq is attached */
/* leaf cfs_rqs are those that hold tasks (lowest schedulable entity in
/*
* leaf cfs_rqs are those that hold tasks (lowest schedulable entity in
* a hierarchy). Non-leaf lrqs hold other higher schedulable entities
* (like users, containers etc.)
*
* leaf_cfs_rq_list ties together list of leaf cfs_rq's in a cpu. This
* list is used during load balance.
*/
struct list_head leaf_cfs_rq_list; /* Better name : task_cfs_rq_list? */
struct task_group *tg; /* group that "owns" this runqueue */
struct list_head leaf_cfs_rq_list;
struct task_group *tg; /* group that "owns" this runqueue */
#endif
};
@ -300,7 +300,7 @@ struct rq {
/* list of leaf cfs_rq on this cpu: */
struct list_head leaf_cfs_rq_list;
#endif
struct rt_rq rt;
struct rt_rq rt;
/*
* This is part of a global counter where only the total sum
@ -457,8 +457,8 @@ enum {
SCHED_FEAT_NEW_FAIR_SLEEPERS = 1,
SCHED_FEAT_WAKEUP_PREEMPT = 2,
SCHED_FEAT_START_DEBIT = 4,
SCHED_FEAT_TREE_AVG = 8,
SCHED_FEAT_APPROX_AVG = 16,
SCHED_FEAT_TREE_AVG = 8,
SCHED_FEAT_APPROX_AVG = 16,
};
const_debug unsigned int sysctl_sched_features =
@ -591,7 +591,7 @@ static inline struct rq *__task_rq_lock(struct task_struct *p)
/*
* task_rq_lock - lock the runqueue a given task resides on and disable
* interrupts. Note the ordering: we can safely lookup the task_rq without
* interrupts. Note the ordering: we can safely lookup the task_rq without
* explicitly disabling preemption.
*/
static struct rq *task_rq_lock(struct task_struct *p, unsigned long *flags)
@ -779,7 +779,7 @@ static inline void update_load_sub(struct load_weight *lw, unsigned long dec)
* To aid in avoiding the subversion of "niceness" due to uneven distribution
* of tasks with abnormal "nice" values across CPUs the contribution that
* each task makes to its run queue's load is weighted according to its
* scheduling class and "nice" value. For SCHED_NORMAL tasks this is just a
* scheduling class and "nice" value. For SCHED_NORMAL tasks this is just a
* scaled version of the new time slice allocation that they receive on time
* slice expiry etc.
*/
@ -1854,7 +1854,7 @@ prepare_task_switch(struct rq *rq, struct task_struct *prev,
* and do any other architecture-specific cleanup actions.
*
* Note that we may have delayed dropping an mm in context_switch(). If
* so, we finish that here outside of the runqueue lock. (Doing it
* so, we finish that here outside of the runqueue lock. (Doing it
* with the lock held can cause deadlocks; see schedule() for
* details.)
*/
@ -2136,7 +2136,7 @@ static void double_lock_balance(struct rq *this_rq, struct rq *busiest)
/*
* If dest_cpu is allowed for this process, migrate the task to it.
* This is accomplished by forcing the cpu_allowed mask to only
* allow dest_cpu, which will force the cpu onto dest_cpu. Then
* allow dest_cpu, which will force the cpu onto dest_cpu. Then
* the cpu_allowed mask is restored.
*/
static void sched_migrate_task(struct task_struct *p, int dest_cpu)
@ -2581,7 +2581,7 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
* tasks around. Thus we look for the minimum possible imbalance.
* Negative imbalances (*we* are more loaded than anyone else) will
* be counted as no imbalance for these purposes -- we can't fix that
* by pulling tasks to us. Be careful of negative numbers as they'll
* by pulling tasks to us. Be careful of negative numbers as they'll
* appear as very large values with unsigned longs.
*/
if (max_load <= busiest_load_per_task)
@ -3016,7 +3016,7 @@ static void active_load_balance(struct rq *busiest_rq, int busiest_cpu)
/*
* This condition is "impossible", if it occurs
* we need to fix it. Originally reported by
* we need to fix it. Originally reported by
* Bjorn Helgaas on a 128-cpu setup.
*/
BUG_ON(busiest_rq == target_rq);
@ -3048,7 +3048,7 @@ static void active_load_balance(struct rq *busiest_rq, int busiest_cpu)
#ifdef CONFIG_NO_HZ
static struct {
atomic_t load_balancer;
cpumask_t cpu_mask;
cpumask_t cpu_mask;
} nohz ____cacheline_aligned = {
.load_balancer = ATOMIC_INIT(-1),
.cpu_mask = CPU_MASK_NONE,
@ -3552,7 +3552,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
static inline void schedule_debug(struct task_struct *prev)
{
/*
* Test if we are atomic. Since do_exit() needs to call into
* Test if we are atomic. Since do_exit() needs to call into
* schedule() atomically, we ignore that path for now.
* Otherwise, whine if we are scheduling when we should not be.
*/
@ -3674,7 +3674,7 @@ EXPORT_SYMBOL(schedule);
#ifdef CONFIG_PREEMPT
/*
* this is the entry point to schedule() from in-kernel preemption
* off of preempt_enable. Kernel preemptions off return from interrupt
* off of preempt_enable. Kernel preemptions off return from interrupt
* occur there and call schedule directly.
*/
asmlinkage void __sched preempt_schedule(void)
@ -3686,7 +3686,7 @@ asmlinkage void __sched preempt_schedule(void)
#endif
/*
* If there is a non-zero preempt_count or interrupts are disabled,
* we do not want to preempt the current task. Just return..
* we do not want to preempt the current task. Just return..
*/
if (likely(ti->preempt_count || irqs_disabled()))
return;
@ -3772,12 +3772,12 @@ int default_wake_function(wait_queue_t *curr, unsigned mode, int sync,
EXPORT_SYMBOL(default_wake_function);
/*
* The core wakeup function. Non-exclusive wakeups (nr_exclusive == 0) just
* wake everything up. If it's an exclusive wakeup (nr_exclusive == small +ve
* The core wakeup function. Non-exclusive wakeups (nr_exclusive == 0) just
* wake everything up. If it's an exclusive wakeup (nr_exclusive == small +ve
* number) then we wake all the non-exclusive tasks and one exclusive task.
*
* There are circumstances in which we can try to wake a task which has already
* started to run but is not in state TASK_RUNNING. try_to_wake_up() returns
* started to run but is not in state TASK_RUNNING. try_to_wake_up() returns
* zero in this (rare) case, and we handle it by continuing to scan the queue.
*/
static void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
@ -4390,8 +4390,8 @@ do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
* @policy: new policy.
* @param: structure containing the new RT priority.
*/
asmlinkage long sys_sched_setscheduler(pid_t pid, int policy,
struct sched_param __user *param)
asmlinkage long
sys_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
{
/* negative values for policy are not valid */
if (policy < 0)
@ -4491,7 +4491,7 @@ long sched_setaffinity(pid_t pid, cpumask_t new_mask)
/*
* It is not safe to call set_cpus_allowed with the
* tasklist_lock held. We will bump the task_struct's
* tasklist_lock held. We will bump the task_struct's
* usage count and then drop tasklist_lock.
*/
get_task_struct(p);
@ -4687,7 +4687,7 @@ EXPORT_SYMBOL(cond_resched);
* cond_resched_lock() - if a reschedule is pending, drop the given lock,
* call schedule, and on return reacquire the lock.
*
* This works OK both with and without CONFIG_PREEMPT. We do strange low-level
* This works OK both with and without CONFIG_PREEMPT. We do strange low-level
* operations here to prevent schedule() from being called twice (once via
* spin_unlock(), once by hand).
*/
@ -4741,7 +4741,7 @@ void __sched yield(void)
EXPORT_SYMBOL(yield);
/*
* This task is about to go to sleep on IO. Increment rq->nr_iowait so
* This task is about to go to sleep on IO. Increment rq->nr_iowait so
* that process accounting knows that this is a task in IO wait state.
*
* But don't do that if it is a deliberate, throttling IO wait (this task
@ -5050,7 +5050,7 @@ static inline void sched_init_granularity(void)
* is removed from the allowed bitmask.
*
* NOTE: the caller must have a valid reference to the task, the
* task must not exit() & deallocate itself prematurely. The
* task must not exit() & deallocate itself prematurely. The
* call is not atomic; no spinlocks may be held.
*/
int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
@ -5087,7 +5087,7 @@ int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
EXPORT_SYMBOL_GPL(set_cpus_allowed);
/*
* Move (not current) task off this cpu, onto dest cpu. We're doing
* Move (not current) task off this cpu, onto dest cpu. We're doing
* this because either it can't run here any more (set_cpus_allowed()
* away from this CPU, or CPU going down), or because we're
* attempting to rebalance this task on exec (sched_exec).
@ -5232,7 +5232,7 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
* Try to stay on the same cpuset, where the
* current cpuset may be a subset of all cpus.
* The cpuset_cpus_allowed_locked() variant of
* cpuset_cpus_allowed() will not block. It must be
* cpuset_cpus_allowed() will not block. It must be
* called within calls to cpuset_lock/cpuset_unlock.
*/
rq = task_rq_lock(p, &flags);
@ -5245,10 +5245,11 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
* kernel threads (both mm NULL), since they never
* leave kernel.
*/
if (p->mm && printk_ratelimit())
if (p->mm && printk_ratelimit()) {
printk(KERN_INFO "process %d (%s) no "
"longer affine to cpu%d\n",
task_pid_nr(p), p->comm, dead_cpu);
task_pid_nr(p), p->comm, dead_cpu);
}
}
} while (!__migrate_task_irq(p, dead_cpu, dest_cpu));
}
@ -5350,7 +5351,7 @@ static void migrate_dead(unsigned int dead_cpu, struct task_struct *p)
/*
* Drop lock around migration; if someone else moves it,
* that's OK. No task can be added to this CPU, so iteration is
* that's OK. No task can be added to this CPU, so iteration is
* fine.
*/
spin_unlock_irq(&rq->lock);
@ -5414,7 +5415,7 @@ static void sd_free_ctl_entry(struct ctl_table **tablep)
/*
* In the intermediate directories, both the child directory and
* procname are dynamically allocated and could fail but the mode
* will always be set. In the lowest directory the names are
* will always be set. In the lowest directory the names are
* static strings and all have proc handlers.
*/
for (entry = *tablep; entry->mode; entry++) {
@ -5585,7 +5586,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
case CPU_UP_CANCELED_FROZEN:
if (!cpu_rq(cpu)->migration_thread)
break;
/* Unbind it from offline cpu so it can run. Fall thru. */
/* Unbind it from offline cpu so it can run. Fall thru. */
kthread_bind(cpu_rq(cpu)->migration_thread,
any_online_cpu(cpu_online_map));
kthread_stop(cpu_rq(cpu)->migration_thread);
@ -5612,9 +5613,11 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
migrate_nr_uninterruptible(rq);
BUG_ON(rq->nr_running != 0);
/* No need to migrate the tasks: it was best-effort if
* they didn't take sched_hotcpu_mutex. Just wake up
* the requestors. */
/*
* No need to migrate the tasks: it was best-effort if
* they didn't take sched_hotcpu_mutex. Just wake up
* the requestors.
*/
spin_lock_irq(&rq->lock);
while (!list_empty(&rq->migration_queue)) {
struct migration_req *req;
@ -5922,7 +5925,7 @@ init_sched_build_groups(cpumask_t span, const cpumask_t *cpu_map,
* @node: node whose sched_domain we're building
* @used_nodes: nodes already in the sched_domain
*
* Find the next node to include in a given scheduling domain. Simply
* Find the next node to include in a given scheduling domain. Simply
* finds the closest node not already in the @used_nodes map.
*
* Should use nodemask_t.
@ -5962,7 +5965,7 @@ static int find_next_best_node(int node, unsigned long *used_nodes)
* @node: node whose cpumask we're constructing
* @size: number of nodes to include in this span
*
* Given a node, construct a good cpumask for its sched_domain to span. It
* Given a node, construct a good cpumask for its sched_domain to span. It
* should be one that prevents unnecessary balancing, but also spreads tasks
* out optimally.
*/
@ -5999,8 +6002,8 @@ int sched_smt_power_savings = 0, sched_mc_power_savings = 0;
static DEFINE_PER_CPU(struct sched_domain, cpu_domains);
static DEFINE_PER_CPU(struct sched_group, sched_group_cpus);
static int cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map,
struct sched_group **sg)
static int
cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
{
if (sg)
*sg = &per_cpu(sched_group_cpus, cpu);
@ -6017,8 +6020,8 @@ static DEFINE_PER_CPU(struct sched_group, sched_group_core);
#endif
#if defined(CONFIG_SCHED_MC) && defined(CONFIG_SCHED_SMT)
static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
struct sched_group **sg)
static int
cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
{
int group;
cpumask_t mask = per_cpu(cpu_sibling_map, cpu);
@ -6029,8 +6032,8 @@ static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
return group;
}
#elif defined(CONFIG_SCHED_MC)
static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
struct sched_group **sg)
static int
cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
{
if (sg)
*sg = &per_cpu(sched_group_core, cpu);
@ -6041,8 +6044,8 @@ static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
static DEFINE_PER_CPU(struct sched_domain, phys_domains);
static DEFINE_PER_CPU(struct sched_group, sched_group_phys);
static int cpu_to_phys_group(int cpu, const cpumask_t *cpu_map,
struct sched_group **sg)
static int
cpu_to_phys_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
{
int group;
#ifdef CONFIG_SCHED_MC
@ -6222,7 +6225,7 @@ static int build_sched_domains(const cpumask_t *cpu_map)
* Allocate the per-node list of sched groups
*/
sched_group_nodes = kcalloc(MAX_NUMNODES, sizeof(struct sched_group *),
GFP_KERNEL);
GFP_KERNEL);
if (!sched_group_nodes) {
printk(KERN_WARNING "Can not alloc sched group node list\n");
return -ENOMEM;
@ -6469,7 +6472,7 @@ static int ndoms_cur; /* number of sched domains in 'doms_cur' */
static cpumask_t fallback_doms;
/*
* Set up scheduler domains and groups. Callers must hold the hotplug lock.
* Set up scheduler domains and groups. Callers must hold the hotplug lock.
* For now this just excludes isolated cpus, but could be used to
* exclude other special cases in the future.
*/
@ -6511,19 +6514,19 @@ static void detach_destroy_domains(const cpumask_t *cpu_map)
/*
* Partition sched domains as specified by the 'ndoms_new'
* cpumasks in the array doms_new[] of cpumasks. This compares
* cpumasks in the array doms_new[] of cpumasks. This compares
* doms_new[] to the current sched domain partitioning, doms_cur[].
* It destroys each deleted domain and builds each new domain.
*
* 'doms_new' is an array of cpumask_t's of length 'ndoms_new'.
* The masks don't intersect (don't overlap.) We should setup one
* sched domain for each mask. CPUs not in any of the cpumasks will
* not be load balanced. If the same cpumask appears both in the
* The masks don't intersect (don't overlap.) We should setup one
* sched domain for each mask. CPUs not in any of the cpumasks will
* not be load balanced. If the same cpumask appears both in the
* current 'doms_cur' domains and in the new 'doms_new', we can leave
* it as it is.
*
* The passed in 'doms_new' should be kmalloc'd. This routine takes
* ownership of it and will kfree it when done with it. If the caller
* The passed in 'doms_new' should be kmalloc'd. This routine takes
* ownership of it and will kfree it when done with it. If the caller
* failed the kmalloc call, then it can pass in doms_new == NULL,
* and partition_sched_domains() will fallback to the single partition
* 'fallback_doms'.
@ -6653,7 +6656,7 @@ int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
#endif
/*
* Force a reinitialization of the sched domains hierarchy. The domains
* Force a reinitialization of the sched domains hierarchy. The domains
* and groups cannot be updated in place without racing with the balancing
* code, so we temporarily attach all running cpus to the NULL domain
* which will prevent rebalancing while the sched domains are recalculated.
@ -6943,8 +6946,8 @@ struct task_struct *curr_task(int cpu)
* @p: the task pointer to set.
*
* Description: This function must only be used when non-maskable interrupts
* are serviced on a separate stack. It allows the architecture to switch the
* notion of the current task on a cpu in a non-blocking manner. This function
* are serviced on a separate stack. It allows the architecture to switch the
* notion of the current task on a cpu in a non-blocking manner. This function
* must be called with all CPU's synchronized, and interrupts disabled, the
* and caller must save the original value of the current task (see
* curr_task() above) and restore that value before reenabling interrupts and
@ -7193,16 +7196,17 @@ cpu_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cgrp)
return &tg->css;
}
static void cpu_cgroup_destroy(struct cgroup_subsys *ss,
struct cgroup *cgrp)
static void
cpu_cgroup_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
{
struct task_group *tg = cgroup_tg(cgrp);
sched_destroy_group(tg);
}
static int cpu_cgroup_can_attach(struct cgroup_subsys *ss,
struct cgroup *cgrp, struct task_struct *tsk)
static int
cpu_cgroup_can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct task_struct *tsk)
{
/* We don't support RT-tasks being in separate groups */
if (tsk->sched_class != &fair_sched_class)
@ -7308,8 +7312,8 @@ static struct cgroup_subsys_state *cpuacct_create(
}
/* destroy an existing cpu accounting group */
static void cpuacct_destroy(struct cgroup_subsys *ss,
struct cgroup *cont)
static void
cpuacct_destroy(struct cgroup_subsys *ss, struct cgroup *cont)
{
struct cpuacct *ca = cgroup_ca(cont);