diff options
| -rw-r--r-- | kernel/Kconfig.preempt | 1 | ||||
| -rw-r--r-- | kernel/sched/ext.c | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt index f3d140c3acc1..fe782cd77388 100644 --- a/kernel/Kconfig.preempt +++ b/kernel/Kconfig.preempt @@ -136,6 +136,7 @@ config SCHED_CORE config SCHED_CLASS_EXT bool "Extensible Scheduling Class" depends on BPF_SYSCALL && BPF_JIT && DEBUG_INFO_BTF + select STACKTRACE if STACKTRACE_SUPPORT help This option enables a new scheduler class sched_ext (SCX), which allows scheduling policies to be implemented as BPF programs to diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 4a07deb30c44..6f7c7d8b56de 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -4330,7 +4330,7 @@ static void scx_dump_task(struct seq_buf *s, struct scx_dump_ctx *dctx, static unsigned long bt[SCX_EXIT_BT_LEN]; char dsq_id_buf[19] = "(n/a)"; unsigned long ops_state = atomic_long_read(&p->scx.ops_state); - unsigned int bt_len; + unsigned int bt_len = 0; if (p->scx.dsq) scnprintf(dsq_id_buf, sizeof(dsq_id_buf), "0x%llx", @@ -4355,7 +4355,9 @@ static void scx_dump_task(struct seq_buf *s, struct scx_dump_ctx *dctx, ops_dump_exit(); } +#ifdef CONFIG_STACKTRACE bt_len = stack_trace_save_tsk(p, bt, SCX_EXIT_BT_LEN, 1); +#endif if (bt_len) { dump_newline(s); dump_stack_trace(s, " ", bt, bt_len); |