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| author | Evgeny Voevodin <evgeny.voevodin@intel.com> | 2016-03-23 12:26:52 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-04-22 15:42:31 +0300 |
| commit | d9676fa152c83b82137af950b1d4f629045d90c9 (patch) | |
| tree | 0351ddfe5922e63ca60db11660d878f21f7de7f0 /arch/arc/kernel/entry-arcv2.S | |
| parent | c3b46c73264b03000d1e18b22f5caf63332547c9 (diff) | |
| download | linux-d9676fa152c83b82137af950b1d4f629045d90c9.tar.xz | |
ARCv2: Enable LOCKDEP
- The asm helpers for calling into irq tracer were missing
- Add calls to above helpers in low level assembly entry code for ARCv2
- irq_save() uses CLRI to disable interrupts and returns the prev interrupt
state (in STATUS32) in a specific encoding (and not the raw value of
STATUS32). This is usable with SETI in irq_restore(). However
save_flags() reads the raw value of STATUS32 which doesn't pair with
irq_save/restore() and thus needs fixing.
Signed-off-by: Evgeny Voevodin <evgeny.voevodin@intel.com>
[vgupta: updated changelog and also added some comments]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/kernel/entry-arcv2.S')
| -rw-r--r-- | arch/arc/kernel/entry-arcv2.S | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/arc/kernel/entry-arcv2.S b/arch/arc/kernel/entry-arcv2.S index c1264607bbff..7a1c124ff021 100644 --- a/arch/arc/kernel/entry-arcv2.S +++ b/arch/arc/kernel/entry-arcv2.S @@ -69,8 +69,11 @@ ENTRY(handle_interrupt) clri ; To make status32.IE agree with CPU internal state - lr r0, [ICAUSE] +#ifdef CONFIG_TRACE_IRQFLAGS + TRACE_ASM_IRQ_DISABLE +#endif + lr r0, [ICAUSE] mov blink, ret_from_exception b.d arch_do_IRQ @@ -169,6 +172,11 @@ END(EV_TLBProtV) .Lrestore_regs: + # Interrpts are actually disabled from this point on, but will get + # reenabled after we return from interrupt/exception. + # But irq tracer needs to be told now... + TRACE_ASM_IRQ_ENABLE + ld r0, [sp, PT_status32] ; U/K mode at time of entry lr r10, [AUX_IRQ_ACT] |