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Re: [PATCH V8 08/10] ras: acpi / apei: generate trace event for unrecognized CPER section

From Steven Rostedt <rostedt@goodmis.org>
Newsgroups linux.kernel
Subject Re: [PATCH V8 08/10] ras: acpi / apei: generate trace event for unrecognized CPER section
Date 2017-02-15 18:10 +0100
Message-ID <tbbfA-2La-13@gated-at.bofh.it> (permalink)
References <t66Jz-iP-5@gated-at.bofh.it> <t66JA-iP-27@gated-at.bofh.it> <tba9Q-1T0-7@gated-at.bofh.it> <tbb5U-2sv-23@gated-at.bofh.it>
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On Wed, 15 Feb 2017 09:54:09 -0700
"Baicar, Tyler" <tbaicar@codeaurora.org> wrote:
\
> 
> In v9 I currently have this and the ARM trace event from this series 
> both wrapped in an
> ifdef verifying that CONFIG_RAS is enabled. This resolves the kbuild 
> failures and
> will have this code compiled out when that config isn't enabled. Do you 
> think I
> should use the ifdef or use these *_enabled() functions?
> 

I believe you need both. The *_enabled() functions wont prevent build
errors. But since tracing is seldom enabled (usually only when you want
to see what's happening), the *_enabled() functions optimize the code
to not perform tasks that are only needed when tracing is enabled. When
I say "enabled" I mean actively tracing, as supposed to being just
enabled in the kernel.

-- Steve

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Re: [PATCH V8 08/10] ras: acpi / apei: generate trace event for  unrecognized CPER section Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 17:00 +0100
  Re: [PATCH V8 08/10] ras: acpi / apei: generate trace event for  unrecognized CPER section "Baicar, Tyler" <tbaicar@codeaurora.org> - 2017-02-15 18:00 +0100
    Re: [PATCH V8 08/10] ras: acpi / apei: generate trace event for  unrecognized CPER section "Baicar, Tyler" <tbaicar@codeaurora.org> - 2017-02-15 18:10 +0100
    Re: [PATCH V8 08/10] ras: acpi / apei: generate trace event for  unrecognized CPER section Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 18:10 +0100

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