Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
sched: Restructure sched_class order sanity checks in sched_init()
Currently, sched_init() checks that the sched_class'es are in the expected
order by testing each adjacency which is a bit brittle and makes it
cumbersome to add optional sched_class'es. Instead, let's verify whether
they're in the expected order using sched_class_above() which is what
matters.
Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: David Vernet <dvernet@meta.com>
+4
-4
+4
-4
kernel/sched/core.c
+4
-4
kernel/sched/core.c
···
8164
8164
int i;
8165
8165
8166
8166
/* Make sure the linker didn't screw up */
8167
-
BUG_ON(&idle_sched_class != &fair_sched_class + 1 ||
8168
-
&fair_sched_class != &rt_sched_class + 1 ||
8169
-
&rt_sched_class != &dl_sched_class + 1);
8170
8167
#ifdef CONFIG_SMP
8171
-
BUG_ON(&dl_sched_class != &stop_sched_class + 1);
8168
+
BUG_ON(!sched_class_above(&stop_sched_class, &dl_sched_class));
8172
8169
#endif
8170
+
BUG_ON(!sched_class_above(&dl_sched_class, &rt_sched_class));
8171
+
BUG_ON(!sched_class_above(&rt_sched_class, &fair_sched_class));
8172
+
BUG_ON(!sched_class_above(&fair_sched_class, &idle_sched_class));
8173
8173
8174
8174
wait_bit_init();
8175
8175