The following commit has been merged into the sched/core branch of tip: Commit-ID: a87e749e8fa1aaef9b4db32e21c2795e69ce67bf Gitweb: https://git.kernel.org/tip/a87e749e8fa1aaef9b4db32e21c2795e69ce67bf Author: Steven Rostedt (VMware) <rost...@goodmis.org> AuthorDate: Thu, 19 Dec 2019 16:44:54 -05:00 Committer: Peter Zijlstra <pet...@infradead.org> CommitterDate: Thu, 25 Jun 2020 13:45:44 +02:00
sched: Remove struct sched_class::next field Now that the sched_class descriptors are defined in order via the linker script vmlinux.lds.h, there's no reason to have a "next" pointer to the previous priroity structure. The order of the sturctures can be aligned as an array, and used to index and find the next sched_class descriptor. Signed-off-by: Steven Rostedt (VMware) <rost...@goodmis.org> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Link: https://lkml.kernel.org/r/20191219214558.845353...@goodmis.org --- kernel/sched/deadline.c | 1 - kernel/sched/fair.c | 1 - kernel/sched/idle.c | 1 - kernel/sched/rt.c | 1 - kernel/sched/sched.h | 1 - kernel/sched/stop_task.c | 1 - 6 files changed, 6 deletions(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index d9e7946..c9cc1d6 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -2481,7 +2481,6 @@ static void prio_changed_dl(struct rq *rq, struct task_struct *p, const struct sched_class dl_sched_class __attribute__((section("__dl_sched_class"))) = { - .next = &rt_sched_class, .enqueue_task = enqueue_task_dl, .dequeue_task = dequeue_task_dl, .yield_task = yield_task_dl, diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 3365f6b..a63f400 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -11124,7 +11124,6 @@ static unsigned int get_rr_interval_fair(struct rq *rq, struct task_struct *task */ const struct sched_class fair_sched_class __attribute__((section("__fair_sched_class"))) = { - .next = &idle_sched_class, .enqueue_task = enqueue_task_fair, .dequeue_task = dequeue_task_fair, .yield_task = yield_task_fair, diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index f580629..336d478 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -455,7 +455,6 @@ static void update_curr_idle(struct rq *rq) */ const struct sched_class idle_sched_class __attribute__((section("__idle_sched_class"))) = { - /* .next is NULL */ /* no enqueue/yield_task for idle tasks */ /* dequeue is not valid, we print a debug message there: */ diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 6543d44..f215eea 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -2431,7 +2431,6 @@ static unsigned int get_rr_interval_rt(struct rq *rq, struct task_struct *task) const struct sched_class rt_sched_class __attribute__((section("__rt_sched_class"))) = { - .next = &fair_sched_class, .enqueue_task = enqueue_task_rt, .dequeue_task = dequeue_task_rt, .yield_task = yield_task_rt, diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 4165c06..549e7e6 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1754,7 +1754,6 @@ extern const u32 sched_prio_to_wmult[40]; #define RETRY_TASK ((void *)-1UL) struct sched_class { - const struct sched_class *next; #ifdef CONFIG_UCLAMP_TASK int uclamp_enabled; diff --git a/kernel/sched/stop_task.c b/kernel/sched/stop_task.c index f4bbd54..394bc81 100644 --- a/kernel/sched/stop_task.c +++ b/kernel/sched/stop_task.c @@ -111,7 +111,6 @@ static void update_curr_stop(struct rq *rq) */ const struct sched_class stop_sched_class __attribute__((section("__stop_sched_class"))) = { - .next = &dl_sched_class, .enqueue_task = enqueue_task_stop, .dequeue_task = dequeue_task_stop,
