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>

diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index b202b82..e7ba2d4 100644 (file)
--- 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 1c5595a..b17a209 100644 (file)
--- 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 (file)
--- 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))) {