From 78cdfb5cf15e0f9fb4c2a9176a13a907a1d024f0 Mon Sep 17 00:00:00 2001 From: Stafford Horne Date: Mon, 24 Jul 2017 21:55:16 +0900 Subject: openrisc: enable LOCKDEP_SUPPORT and irqflags tracing Lockdep is needed for proving the spinlocks and rwlocks work fine on our platform. It also requires calling the trace_hardirqs_off() and trace_hardirqs_on() pair of routines when entering and exiting an interrupt. For OpenRISC the interrupt stack frame does not support frame pointers, so to call trace_hardirqs_on() and trace_hardirqs_off() here the macro's build up a stack frame each time. There is one necessary small change in _sys_call_handler to move interrupt enabling later so they can get re-enabled during syscall restart. This was done to fix lockdep warnings that are now possible due to this patch. Signed-off-by: Stafford Horne --- arch/openrisc/Kconfig | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/openrisc/Kconfig') diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index 399f55e..f8cfb3b 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -64,6 +64,9 @@ config GENERIC_CSUM config STACKTRACE_SUPPORT def_bool y +config LOCKDEP_SUPPORT + def_bool y + source "init/Kconfig" source "kernel/Kconfig.freezer" -- cgit v1.1