linux-kernel - Re: [PATCH] xen: Move xen_have_vector_callback definition to enlighten.c

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Date:   Tue, 2 May 2017 17:22:27 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>, jgross@...e.com
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xen: Move xen_have_vector_callback definition to
 enlighten.c

On 05/02/17 10:23, Boris Ostrovsky wrote:
> Commit 84d582d236dc ("xen: Revert commits da72ff5bfcb0 and
> 72a9b186292d") defined xen_have_vector_callback in enlighten_hvm.c.
> Since guest-type-neutral code refers to this variable this causes
> build failures when CONFIG_XEN_PVHVM is not defined.
> 
> Moving xen_have_vector_callback definition to enlighten.c resolves
> this issue.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Reported-by: Randy Dunlap <rdunlap@...radead.org>

Works for me.  Thanks.

Acked-by: Randy Dunlap <rdunlap@...radead.org>


> ---
>  arch/x86/xen/enlighten.c     | 3 +++
>  arch/x86/xen/enlighten_hvm.c | 3 ---
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> index 41d324c..a5ffcbb 100644
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -57,6 +57,9 @@ EXPORT_SYMBOL_GPL(xen_start_info);
>  
>  struct shared_info xen_dummy_shared_info;
>  
> +__read_mostly int xen_have_vector_callback;
> +EXPORT_SYMBOL_GPL(xen_have_vector_callback);
> +
>  /*
>   * Point at some empty memory to start with. We map the real shared_info
>   * page as soon as fixmap is up and running.
> diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
> index 078c512..a6d014f 100644
> --- a/arch/x86/xen/enlighten_hvm.c
> +++ b/arch/x86/xen/enlighten_hvm.c
> @@ -18,9 +18,6 @@
>  #include "mmu.h"
>  #include "smp.h"
>  
> -__read_mostly int xen_have_vector_callback;
> -EXPORT_SYMBOL_GPL(xen_have_vector_callback);
> -
>  void __ref xen_hvm_init_shared_info(void)
>  {
>  	int cpu;
> 


-- 
~Randy