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Re: [PATCH] perf core: Get rid of 'uses dynamic stack allocation' warning

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On Fri, Jan 22, 2016 at 06:52:01AM +0000, Wang Nan wrote:
> On s390 with CONFIG_WARN_DYNAMIC_STACK set, 'uses dynamic stack
> allocation' warning is issued when defining 'struct perf_sample_data'
> local variable.
> 
> This patch suppress this warning by allocating extra 255 bytes and
> compute aligned pointer manually.

I've seen the warning and always wondered wtf it was about. This
Changelog doesn't actually explain what the problem is, so I cannot
judge the solution.

That said, 255 extra bytes does sound excessive just to avoid a warn.

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[PATCH] perf core: Get rid of 'uses dynamic stack allocation' warning Wang Nan <wangnan0@huawei.com> - 2016-01-22 08:00 +0100
  Re: [PATCH] perf core: Get rid of 'uses dynamic stack allocation'  warning kbuild test robot <lkp@intel.com> - 2016-01-22 08:10 +0100
  Re: [PATCH] perf core: Get rid of 'uses dynamic stack allocation'  warning Peter Zijlstra <peterz@infradead.org> - 2016-01-22 09:10 +0100
    Re: [PATCH] perf core: Get rid of 'uses dynamic stack allocation'  warning "Wangnan (F)" <wangnan0@huawei.com> - 2016-01-22 09:10 +0100

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