Re: [PATCH] tools/perf, rbtree: Add RCU wrappers to make rbtree.h usable in user-space

[Riku Voipio]

On Wednesday, June 17, 2015 12:17:04 PM EEST, Ingo Molnar wrote:
> * Riku Voipio <riku.voipio@xxxxxx> wrote:
>
> > Hi,
> >
> > The commit:
> >
> > commit d72da4a4d973d8a0a0d3c97e7cdebf287fbe3a99
> > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > Date:   Wed May 27 11:09:36 2015 +0930 ...
>
> Does the patch below make things work?

It does,

Tested-by: Riku Voipio <riku.voipio@xxxxxx>

> This fix could go into the modules tree, as this commit came via Rusty.
>
> Stephen, feel free to add:
>
>    make -C tools/perf
>
> to the linux-next build tests. It's always supposed to build 
> without failure, in 
> pretty much whatever x86 distro you run your build tests on.
>
> Thanks,
>
> 	Ingo
>
>
> ===================>
> From 62c251255f07ede8efa356d4ea9ab51827ffa0d0 Mon Sep 17 00:00:00 2001
> From: Ingo Molnar <mingo@xxxxxxxxxx>
> Date: Wed, 17 Jun 2015 11:07:11 +0200
> Subject: [PATCH] tools/perf, rbtree: Add RCU wrappers to make 
> rbtree.h usable in user-space
>
> Reported-by: Riku Voipio <riku.voipio@xxxxxx>
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
> ---
>  tools/perf/util/include/linux/rcupdate.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/tools/perf/util/include/linux/rcupdate.h 
> b/tools/perf/util/include/linux/rcupdate.h
> new file mode 100644
> index 000000000000..3e022dd9a69b
> --- /dev/null
> +++ b/tools/perf/util/include/linux/rcupdate.h
> @@ -0,0 +1,9 @@
> +#ifndef PERF_LINUX_RCUPDATE_H_
> +#define PERF_LINUX_RCUPDATE_H_
> +
> +/* Simple trivial wrappers for now, we don't use RCU in perf 
> user-space (yet): */
> +#define WRITE_ONCE(var, val)			((var) = (val))
> +#define rcu_assign_pointer(ptr, val)		WRITE_ONCE(ptr, val)
> +
> +#endif
> +

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