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Commit 444e0c28 authored by Rabin Vincent's avatar Rabin Vincent Committed by Jesper Nilsson
Browse files

CRISv32: add support for irqflags tracing 



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

Signed-off-by: default avatarRabin Vincent <rabin@rab.in>
Signed-off-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
parent 20ae2473

arch/cris/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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

arch/cris/arch-v32/kernel/entry.S

+11 −0
Original line number Diff line number Diff line
@@ -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.

arch/cris/kernel/irq.c

+5 −1
Original line number Diff line number Diff line
@@ -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))) {