[PATCH sched_ext/for-7.3] sched_ext: Make SCHED_CLASS_EXT select GENERIC_ALLOCATOR
Tejun Heo <[email protected]>
| Newsgroups | dev.linux.lists.sched-ext,dev.linux.lists.oe-kbuild-all,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
kernel/sched/ext/arena.c uses the gen_pool allocator, which is built only
when GENERIC_ALLOCATOR is set. SCHED_CLASS_EXT doesn't select it, so on
configs where nothing else does, the build fails to link:
build_policy.o: undefined reference to `gen_pool_create'
build_policy.o: undefined reference to `gen_pool_for_each_chunk'
build_policy.o: undefined reference to `gen_pool_destroy'
Fixes: 9eca087deb0b ("sched_ext: Sub-allocator over kernel-claimed BPF arena pages")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Tejun Heo <[email protected]>
---
kernel/Kconfig.preempt | 1 +
1 file changed, 1 insertion(+)
--- a/kernel/Kconfig.preempt
+++ b/kernel/Kconfig.preempt
@@ -169,6 +169,7 @@ config SCHED_CORE
config SCHED_CLASS_EXT
bool "Extensible Scheduling Class"
depends on BPF_SYSCALL && BPF_JIT && DEBUG_INFO_BTF
+ select GENERIC_ALLOCATOR
select STACKTRACE if STACKTRACE_SUPPORT
help
This option enables a new scheduler class sched_ext (SCX), which