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| author |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-12-19 16:44:54 -0500 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2020-06-25 13:45:44 +0200 |
| commit | a87e749e8fa1aaef9b4db32e21c2795e69ce67bf (patch) | |
| tree | 967673dca41b3244195d574490bf8bd7c9cc4a70 /kernel/sched | |
| parent | sched: Have sched_class_highest define by vmlinux.lds.h (diff) | |
| download | wireguard-linux-a87e749e8fa1aaef9b4db32e21c2795e69ce67bf.tar.xz wireguard-linux-a87e749e8fa1aaef9b4db32e21c2795e69ce67bf.zip | |
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) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191219214558.845353593@goodmis.org
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/deadline.c | 1 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 1 | ||||
| -rw-r--r-- | kernel/sched/idle.c | 1 | ||||
| -rw-r--r-- | kernel/sched/rt.c | 1 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 1 | ||||
| -rw-r--r-- | kernel/sched/stop_task.c | 1 |
6 files changed, 0 insertions, 6 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index d9e79462993b..c9cc1d6fa363 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 3365f6b07c36..a63f400013de 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 f5806295356b..336d478bddc8 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 6543d4430331..f215eea6a966 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 4165c06d1d7b..549e7e6e0a66 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 f4bbd54caae0..394bc8126a1e 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, |