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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>
This commit is contained in:
Rabin Vincent 2015-02-19 21:36:55 +01:00 committed by Jesper Nilsson
parent 20ae247399
commit 444e0c2881
3 changed files with 20 additions and 1 deletions
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4
arch/cris/Kconfig
View File

@ -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

11
arch/cris/arch-v32/kernel/entry.S
View File

@ -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.

6
arch/cris/kernel/irq.c
View File

@ -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))) {