CRISv32: add support for irqflags tracing

Add support irqflags tracing, which is required for things like lockdep
and ftrace.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/cris/arch-v32/kernel/entry.S b/arch/cris/arch-v32/kernel/entry.S
index 1c5595a6ceb5..b17a20999f87 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.