linux-kernel - Re: [PATCH v2 1/6] powerpc/perf: Define big-endian version of perf_mem_data

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Message-ID: <20170306112228.GZ6515@twins.programming.kicks-ass.net>
Date:   Mon, 6 Mar 2017 12:22:28 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
Cc:     mpe@...erman.id.au, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org,
        Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Wang Nan <wangnan0@...wei.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 1/6] powerpc/perf: Define big-endian version of
 perf_mem_data_src

On Mon, Mar 06, 2017 at 04:13:08PM +0530, Madhavan Srinivasan wrote:
> From: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
> 
> perf_mem_data_src is an union that is initialized via the ->val field
> and accessed via the bitmap fields. For this to work on big endian
> platforms, we also need a big-endian represenation of perf_mem_data_src.

Doesn't this break interpreting the data on a different endian machine?