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Re: [PATCH] branch tracer: fix freak link error

From Arnd Bergmann <arnd@arndb.de>
Newsgroups linux.kernel
Subject Re: [PATCH] branch tracer: fix freak link error
Date 2016-02-12 22:50 +0100
Message-ID <r1tLc-49e-9@gated-at.bofh.it> (permalink)
References <r1trQ-408-3@gated-at.bofh.it> <r1tLd-49e-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Friday 12 February 2016 16:45:03 Nicolas Pitre wrote:
> 
> It is certainly a worthwhile workaround if it solves all the known 
> cases.
> 
> Acked-by: Nicolas Pitre <nico@linaro.org>
> 
> This trick doesn't work with the test case I produced to demonstrate 
> this bug though.  So we might be affected again in the future, or maybe 
> not if we're lucky.

Yes, I think it's clear that there is still something interesting going
on with the compiler and nested __builtin_compatible_p().

I'm currently creating a couple of gcc bug reports and plan to finally submit
this one as well.

Now I have to check if it does anything to the spurious "maybe-uninitialized"
warnings that I saw creeping in with PROFILE_ALL_BRANCHES. My guess is
that it doesn't fix them (I submitted a patch to turn off those
warnings today when PROFILE_ALL_BRANCHES is set), but I'll try anyway.

	Arnd

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Thread

[PATCH] branch tracer: fix freak link error Arnd Bergmann <arnd@arndb.de> - 2016-02-12 22:30 +0100
  Re: [PATCH] branch tracer: fix freak link error Arnd Bergmann <arnd@arndb.de> - 2016-02-12 22:50 +0100
    Re: [PATCH] branch tracer: fix freak link error Arnd Bergmann <arnd@arndb.de> - 2016-02-12 23:00 +0100
      Re: [PATCH] branch tracer: fix freak link error Arnd Bergmann <arnd@arndb.de> - 2016-02-12 23:20 +0100
      Re: [PATCH] branch tracer: fix freak link error Steven Rostedt <rostedt@goodmis.org> - 2016-02-12 23:20 +0100
  Re: [PATCH] branch tracer: fix freak link error Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-12 22:50 +0100
  Re: [PATCH] branch tracer: fix freak link error Steven Rostedt <rostedt@goodmis.org> - 2016-02-15 18:50 +0100
    Re: [PATCH] branch tracer: fix freak link error Arnd Bergmann <arnd@arndb.de> - 2016-02-15 21:20 +0100
      Re: [PATCH] branch tracer: fix freak link error Steven Rostedt <rostedt@goodmis.org> - 2016-02-15 21:30 +0100
        Re: [PATCH] branch tracer: fix freak link error Arnd Bergmann <arnd@arndb.de> - 2016-02-16 10:30 +0100

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