on_thread_stack
if (on_thread_stack())
if (on_thread_stack())
if (IS_ENABLED(CONFIG_IRQ_STACKS) && on_thread_stack())
WARN_ON_ONCE(!on_thread_stack());
BUG_ON(!on_thread_stack() || !user_mode(regs));
WARN_ON_ONCE(!on_thread_stack());
__stackleak_erase(on_thread_stack());