From: Peter Zijlstra peterz@infradead.org
mainline inclusion from mainline-v5.14-rc1 commit 39d371b7c0c299d489041884d005aacc4bba8c15 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5OOWG CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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In prepration for playing games with rq->lock, add some rq_lock wrappers.
Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Tested-by: Don Hiatt dhiatt@digitalocean.com Tested-by: Hongyu Ning hongyu.ning@linux.intel.com Tested-by: Vincent Guittot vincent.guittot@linaro.org Link: https://lkml.kernel.org/r/20210422123308.075967879@infradead.org Signed-off-by: Lin Shengwang linshengwang1@huawei.com Reviewed-by: lihua hucool.lihua@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- kernel/sched/core.c | 15 +++++++++++++ kernel/sched/sched.h | 50 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index e00b39d4e2e2..32da42297ded 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -175,6 +175,21 @@ int sysctl_sched_rt_runtime = 950000; * */
+void raw_spin_rq_lock_nested(struct rq *rq, int subclass) +{ + raw_spin_lock_nested(rq_lockp(rq), subclass); +} + +bool raw_spin_rq_trylock(struct rq *rq) +{ + return raw_spin_trylock(rq_lockp(rq)); +} + +void raw_spin_rq_unlock(struct rq *rq) +{ + raw_spin_unlock(rq_lockp(rq)); +} + /* * __task_rq_lock - lock the rq @p resides on. */ diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index f8127a43b6a0..b71627aacc30 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1151,6 +1151,56 @@ enum task_qos_level { void init_qos_hrtimer(int cpu); #endif
+static inline raw_spinlock_t *rq_lockp(struct rq *rq) +{ + return &rq->lock; +} + +static inline void lockdep_assert_rq_held(struct rq *rq) +{ + lockdep_assert_held(rq_lockp(rq)); +} + +extern void raw_spin_rq_lock_nested(struct rq *rq, int subclass); +extern bool raw_spin_rq_trylock(struct rq *rq); +extern void raw_spin_rq_unlock(struct rq *rq); + +static inline void raw_spin_rq_lock(struct rq *rq) +{ + raw_spin_rq_lock_nested(rq, 0); +} + +static inline void raw_spin_rq_lock_irq(struct rq *rq) +{ + local_irq_disable(); + raw_spin_rq_lock(rq); +} + +static inline void raw_spin_rq_unlock_irq(struct rq *rq) +{ + raw_spin_rq_unlock(rq); + local_irq_enable(); +} + +static inline unsigned long _raw_spin_rq_lock_irqsave(struct rq *rq) +{ + unsigned long flags; + local_irq_save(flags); + raw_spin_rq_lock(rq); + return flags; +} + +static inline void raw_spin_rq_unlock_irqrestore(struct rq *rq, unsigned long flags) +{ + raw_spin_rq_unlock(rq); + local_irq_restore(flags); +} + +#define raw_spin_rq_lock_irqsave(rq, flags) \ +do { \ + flags = _raw_spin_rq_lock_irqsave(rq); \ +} while (0) + #ifdef CONFIG_SCHED_SMT extern void __update_idle_core(struct rq *rq);