linux-kernel - Re: [Regression] Re: Linux 5.0.2

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Message-ID: <20190314200709.GA16125@kroah.com>
Date:   Thu, 14 Mar 2019 13:07:09 -0700
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "Alan J. Wylie" <alan@...ie.me.uk>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [Regression] Re: Linux 5.0.2

On Thu, Mar 14, 2019 at 07:59:00PM +0000, Alan J. Wylie wrote:
> Greg KH <gregkh@...uxfoundation.org> writes:
> 
> > I'm announcing the release of the 5.0.2 kernel.
> 
> There is a regression for AMD-only builds.

Adding the stable list, which people should do...

> 
> See also Alec Ari's report:
> https://lkml.org/lkml/2019/3/13/1113
> 
> > If CONFIG_CPU_SUP_INTEL is disabled with either the 5.0.2 or 4.20.16
> > kernel, it errors out right away:
> 
> $ grep "CONFIG_CPU_SUP_" .config
> # CONFIG_CPU_SUP_INTEL is not set
> CONFIG_CPU_SUP_AMD=y
> # CONFIG_CPU_SUP_HYGON is not set
> # CONFIG_CPU_SUP_CENTAUR is not set
> 
> CC      arch/x86/events/core.o
> In file included from arch/x86/events/core.c:44:
> arch/x86/events/perf_event.h:1035:45: warning: ‘struct cpu_hw_event’ declared inside parameter list will not be visible outside of this definition or declaration
>  static inline int intel_cpuc_prepare(struct cpu_hw_event *cpuc, int cpu)
>                                              ^~~~~~~~~~~~
> arch/x86/events/perf_event.h:1040:45: warning: ‘struct cpu_hw_event’ declared inside parameter list will not be visible outside of this definition or declaration
>  static inline void intel_cpuc_finish(struct cpu_hw_event *cpuc)
>                                              ^~~~~~~~~~~~
> arch/x86/events/core.c: In function ‘free_fake_cpuc’:
> arch/x86/events/core.c:1998:20: error: passing argument 1 of ‘intel_cpuc_finish’ from incompatible pointer type [-Werror=incompatible-pointer-types]
>   intel_cpuc_finish(cpuc);
>                     ^~~~
> In file included from arch/x86/events/core.c:44:
> arch/x86/events/perf_event.h:1040:59: note: expected ‘struct cpu_hw_event *’ but argument is of type ‘struct cpu_hw_events *’
>  static inline void intel_cpuc_finish(struct cpu_hw_event *cpuc)
>                                       ~~~~~~~~~~~~~~~~~~~~~^~~~
> arch/x86/events/core.c: In function ‘allocate_fake_cpuc’:
> arch/x86/events/core.c:2012:25: error: passing argument 1 of ‘intel_cpuc_prepare’ from incompatible pointer type [-Werror=incompatible-pointer-types]
>   if (intel_cpuc_prepare(cpuc, cpu))
>                          ^~~~
> In file included from arch/x86/events/core.c:44:
> arch/x86/events/perf_event.h:1035:59: note: expected ‘struct cpu_hw_event *’ but argument is of type ‘struct cpu_hw_events *’
>  static inline int intel_cpuc_prepare(struct cpu_hw_event *cpuc, int cpu)
>                                       ~~~~~~~~~~~~~~~~~~~~~^~~~
> cc1: some warnings being treated as errors

Is this a regression?  If so, what commit caused this?  Is this also an
issue in Linus's tree right now?

thanks,

greg k-h