On 25.10.18 14:20, Philippe Gerum wrote:
We may call switch_to_bitmap() from the head stage when a co-kernel switches to a new thread context, in which case IRQs are hard disabled, although the root stage might be unstalled.Make sure the preemption debug code in refresh_tss_limit() is aware of this. --- arch/x86/include/asm/desc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h index 0e3758c0c954..7a4cb4333df3 100644 --- a/arch/x86/include/asm/desc.h +++ b/arch/x86/include/asm/desc.h @@ -309,7 +309,7 @@ static inline void force_reload_TR(void) */ static inline void refresh_tss_limit(void) { - DEBUG_LOCKS_WARN_ON(preemptible()); + DEBUG_LOCKS_WARN_ON(!hard_irqs_disabled() && preemptible());if (unlikely(this_cpu_read(__tss_limit_invalid)))force_reload_TR();
This is 4.14-only, right? Jan -- Siemens AG, Corporate Technology, CT RDA IOT SES-DE Corporate Competence Center Embedded Linux
