Let's require start_kernel() is called with arch_irqs_disabled. For now,
just correct that condition and print a warning if CONFIG_DEBUG_IRQFLAGS
is set.
This prevents core code from disabling irqs when they are already
disabled, in aid of eventually adding a debug check to catch that
condition.
Signed-off-by: Nicholas Piggin <[email protected]>
---
init/main.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/init/main.c b/init/main.c
index af50044deed5..f3979628943e 100644
--- a/init/main.c
+++ b/init/main.c
@@ -889,7 +889,11 @@ asmlinkage __visible void __init __no_sanitize_address __noreturn start_kernel(v
cgroup_init_early();
- local_irq_disable();
+ if (!raw_irqs_disabled()) {
+ raw_local_irq_disable();
+ if (IS_ENABLED(CONFIG_DEBUG_IRQFLAGS))
+ WARN_ONCE(1, "arch should call start_kernel with arch_irqs_disabled\n");
+ }
early_boot_irqs_disabled = true;
/*
--
2.40.1