linux-kernel - Re: [PATCH] tracing/events: Fix swiotlb tracepoint creation

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Date:	Wed, 23 Oct 2013 09:41:38 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Jim Davis <jim.epost@...il.com>,
	Zoltan Kiss <zoltan.kiss@...rix.com>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tracing/events: Fix swiotlb tracepoint creation

On Wed, Oct 23, 2013 at 01:32:04PM +0200, Thierry Reding wrote:
> Tracepoints are only created when Xen support is enabled, but they are
> also referenced within lib/swiotlb.c. So unless Xen support is enabled
> the tracepoints will be missing, therefore causing builds to fail. Fix
> this by moving the tracepoint creation to lib/swiotlb.c, which works
> nicely because the Xen swiotlb support selects the generic swiotlb
> support.

Sweet. Thanks!
> 
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---
>  drivers/xen/swiotlb-xen.c | 1 -
>  lib/swiotlb.c             | 1 +
>  2 files changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
> index b310810..44af9d8 100644
> --- a/drivers/xen/swiotlb-xen.c
> +++ b/drivers/xen/swiotlb-xen.c
> @@ -43,7 +43,6 @@
>  #include <xen/xen-ops.h>
>  #include <xen/hvc-console.h>
>  
> -#define CREATE_TRACE_POINTS
>  #include <trace/events/swiotlb.h>
>  /*
>   * Used to do a quick range check in swiotlb_tbl_unmap_single and
> diff --git a/lib/swiotlb.c b/lib/swiotlb.c
> index f0d8419..5558706 100644
> --- a/lib/swiotlb.c
> +++ b/lib/swiotlb.c
> @@ -38,6 +38,7 @@
>  #include <linux/bootmem.h>
>  #include <linux/iommu-helper.h>
>  
> +#define CREATE_TRACE_POINTS
>  #include <trace/events/swiotlb.h>
>  
>  #define OFFSET(val,align) ((unsigned long)	\
> -- 
> 1.8.4
> 
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