Add support irqflags tracing, which is required for things like lockdep
and ftrace.
Signed-off-by: Rabin Vincent <ra...@rab.in>
---
arch/cris/Kconfig | 4 ++++
arch/cris/arch-v32/kernel/entry.S | 11 +++++++++++
arch/cris/kernel/irq.c | 6 +++++-
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 0314e32..efe829e 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -36,6 +36,10 @@ config FORCE_MAX_ZONEORDER
int
default 6
+config TRACE_IRQFLAGS_SUPPORT
+ depends on ETRAX_ARCH_V32
+ def_bool y
+
config CRIS
bool
default y
diff --git a/arch/cris/arch-v32/kernel/entry.S
b/arch/cris/arch-v32/kernel/entry.S
index 026a0b2..3591c37 100644
--- a/arch/cris/arch-v32/kernel/entry.S
+++ b/arch/cris/arch-v32/kernel/entry.S
@@ -240,6 +240,17 @@ ret_from_sys_call:
.type _Rexit,@function
_Rexit:
+#if defined(CONFIG_TRACE_IRQFLAGS)
+ addoq +PT_ccs, $sp, $acr
+ move.d [$acr], $r0
+ btstq 15, $r0 ; I1
+ bpl 1f
+ nop
+ jsr trace_hardirqs_on
+ nop
+1:
+#endif
+
;; This epilogue MUST match the prologues in multiple_interrupt, irq.h
;; and ptregs.h.
addq 4, $sp ; Skip orig_r10.
diff --git a/arch/cris/kernel/irq.c b/arch/cris/kernel/irq.c
index dd0be5d..694850e 100644
--- a/arch/cris/kernel/irq.c
+++ b/arch/cris/kernel/irq.c
@@ -45,7 +45,11 @@
asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
{
unsigned long sp;
- struct pt_regs *old_regs = set_irq_regs(regs);
+ struct pt_regs *old_regs;
+
+ trace_hardirqs_off();
+
+ old_regs = set_irq_regs(regs);
irq_enter();
sp = rdsp();
if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
--
2.1.4
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