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cgroup: remove cgroup_rstat_flush_atomic()

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Previous patches removed the only caller of cgroup_rstat_flush_atomic(). 
Remove the function and simplify the code.

Link: https://lkml.kernel.org/r/20230421174020.2994750-6-yosryahmed@google.com
Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yosry Ahmed
2023-04-21 17:40:20 +00:00
committed by Andrew Morton
parent 35822fdae3
commit 0a2dc6ac33
2 changed files with 5 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/cgroup.h
View File

@@ -692,7 +692,6 @@ static inline void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen)
*/ */
void cgroup_rstat_updated(struct cgroup *cgrp, int cpu); void cgroup_rstat_updated(struct cgroup *cgrp, int cpu);
void cgroup_rstat_flush(struct cgroup *cgrp); void cgroup_rstat_flush(struct cgroup *cgrp);
void cgroup_rstat_flush_atomic(struct cgroup *cgrp);
void cgroup_rstat_flush_hold(struct cgroup *cgrp); void cgroup_rstat_flush_hold(struct cgroup *cgrp);
void cgroup_rstat_flush_release(void); void cgroup_rstat_flush_release(void);

26
kernel/cgroup/rstat.c
View File

@@ -171,7 +171,7 @@ __weak noinline void bpf_rstat_flush(struct cgroup *cgrp,
__diag_pop(); __diag_pop();
/* see cgroup_rstat_flush() */ /* see cgroup_rstat_flush() */
static void cgroup_rstat_flush_locked(struct cgroup *cgrp, bool may_sleep) static void cgroup_rstat_flush_locked(struct cgroup *cgrp)
__releases(&cgroup_rstat_lock) __acquires(&cgroup_rstat_lock) __releases(&cgroup_rstat_lock) __acquires(&cgroup_rstat_lock)
{ {
int cpu; int cpu;
@@ -207,9 +207,8 @@ static void cgroup_rstat_flush_locked(struct cgroup *cgrp, bool may_sleep)
} }
raw_spin_unlock_irqrestore(cpu_lock, flags); raw_spin_unlock_irqrestore(cpu_lock, flags);
/* if @may_sleep, play nice and yield if necessary */ /* play nice and yield if necessary */
if (may_sleep && (need_resched() || if (need_resched() || spin_needbreak(&cgroup_rstat_lock)) {
spin_needbreak(&cgroup_rstat_lock))) {
spin_unlock_irq(&cgroup_rstat_lock); spin_unlock_irq(&cgroup_rstat_lock);
if (!cond_resched()) if (!cond_resched())
cpu_relax(); cpu_relax();
@@ -236,25 +235,10 @@ __bpf_kfunc void cgroup_rstat_flush(struct cgroup *cgrp)
might_sleep(); might_sleep();
spin_lock_irq(&cgroup_rstat_lock); spin_lock_irq(&cgroup_rstat_lock);
cgroup_rstat_flush_locked(cgrp, true); cgroup_rstat_flush_locked(cgrp);
spin_unlock_irq(&cgroup_rstat_lock); spin_unlock_irq(&cgroup_rstat_lock);
} }
/**
* cgroup_rstat_flush_atomic- atomic version of cgroup_rstat_flush()
* @cgrp: target cgroup
*
* This function can be called from any context.
*/
void cgroup_rstat_flush_atomic(struct cgroup *cgrp)
{
unsigned long flags;
spin_lock_irqsave(&cgroup_rstat_lock, flags);
cgroup_rstat_flush_locked(cgrp, false);
spin_unlock_irqrestore(&cgroup_rstat_lock, flags);
}
/** /**
* cgroup_rstat_flush_hold - flush stats in @cgrp's subtree and hold * cgroup_rstat_flush_hold - flush stats in @cgrp's subtree and hold
* @cgrp: target cgroup * @cgrp: target cgroup
@@ -269,7 +253,7 @@ void cgroup_rstat_flush_hold(struct cgroup *cgrp)
{ {
might_sleep(); might_sleep();
spin_lock_irq(&cgroup_rstat_lock); spin_lock_irq(&cgroup_rstat_lock);
cgroup_rstat_flush_locked(cgrp, true); cgroup_rstat_flush_locked(cgrp);
} }
/** /**