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Date: Wed, 3 Jun 2015 12:30:56 +0200
From: Jiri Olsa <jolsa@redhat.com>
To: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: mingo@redhat.com, ak@linux.intel.com,
 Michael Ellerman <mpe@ellerman.id.au>,
 Arnaldo Carvalho de Melo <acme@kernel.org>, namhyung@kernel.org,
 linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v13 03/14] perf, tools: Use pmu_events_map table to
 create event aliases
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On Tue, Jun 02, 2015 at 10:12:03AM -0700, Sukadev Bhattiprolu wrote:

SNIP

>  
> +/*
> + * Return the CPU id as a raw string.
> + *
> + * Each architecture should provide a more precise id string that
> + * can be use to match the architecture's "mapfile".
> + */
> +char *__attribute__((weak))get_cpuid_str(void)

we have '__weak' define in <linux/compiler.h> include

jirka