linux-kernel - Re: [PATCH 3/3] powerpc perf_event: Add alignment-faults and emulation-faults software events

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Date:	Mon, 19 Oct 2009 11:42:26 +1100
From:	Anton Blanchard <anton@...ba.org>
To:	Michael Ellerman <michael@...erman.id.au>
Cc:	benh@...nel.crashing.org, mingo@...e.hu, paulus@...ba.org,
	a.p.zijlstra@...llo.nl, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] powerpc perf_event: Add alignment-faults and
	emulation-faults software events


Hi,

> > +#define PPC_WARN_ALIGNMENT(type, regs)				\
> > +	do {								\
> > +		perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS,		\
> > +			1, 0, regs, regs->dar);				\
> > +		__PPC_WARN_EMULATED(type);				\
> > +	} while (0)
> 
> Does that work with perfxxx configured off?

Yeah, perf_event.h defines an empty version if its configured off:

static inline void
perf_sw_event(u32 event_id, u64 nr, int nmi,
                     struct pt_regs *regs, u64 addr)                    { }

Anton
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