linux-kernel - Re: [PATCH] rcu: don't include <linux/ktime.h> in rcutiny.h

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Date:   Wed, 21 Aug 2019 20:02:00 -0700
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     Christoph Hellwig <hch@....de>
Cc:     josh@...htriplett.org, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rcu: don't include <linux/ktime.h> in rcutiny.h

On Thu, Aug 22, 2019 at 10:53:43AM +0900, Christoph Hellwig wrote:
> The kbuild reported a built failure due to a header loop when RCUTINY is
> enabled with my pending riscv-nommu port.  Switch rcutiny.h to only
> include the minimal required header to get HZ instead.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Queued for review and testing, thank you!

Do you need this in v5.4?  My normal workflow would put it into v5.5.

							Thanx, Paul

> ---
>  include/linux/rcutiny.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
> index 8e727f57d814..9bf1dfe7781f 100644
> --- a/include/linux/rcutiny.h
> +++ b/include/linux/rcutiny.h
> @@ -12,7 +12,7 @@
>  #ifndef __LINUX_TINY_H
>  #define __LINUX_TINY_H
>  
> -#include <linux/ktime.h>
> +#include <asm/param.h> /* for HZ */
>  
>  /* Never flag non-existent other CPUs! */
>  static inline bool rcu_eqs_special_set(int cpu) { return false; }
> -- 
> 2.20.1
>