linux-kernel - Re: [PATCH] jump_label: don't export section tags

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Message-ID: <49d7b075-082b-0a60-405e-e7ff7565ed0d@akamai.com>
Date:   Fri, 10 Feb 2017 14:05:36 -0500
From:   Jason Baron <jbaron@...mai.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Borislav Petkov <bp@...en8.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mel Gorman <mgorman@...e.de>, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] jump_label: don't export section tags



On 02/10/2017 12:29 PM, Michael S. Tsirkin wrote:
> These are supplied by the linker and only used by jump_label.c.
> This trivial patch moves them out of jump_label.h.
>
> Cc: Jason Baron <jbaron@...mai.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Mel Gorman <mgorman@...e.de>
> Cc: Ingo Molnar <mingo@...nel.org>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  include/linux/jump_label.h | 3 ---
>  kernel/jump_label.c        | 4 ++++
>  2 files changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
> index 48ed83f..21701da 100644
> --- a/include/linux/jump_label.h
> +++ b/include/linux/jump_label.h
> @@ -132,9 +132,6 @@ static __always_inline bool static_key_true(struct static_key *key)
>  	return !arch_static_branch(key, true);
>  }
>
> -extern const struct jump_entry __start___jump_table[];
> -extern const struct jump_entry __stop___jump_table[];
> -
>  extern void jump_label_init(void);
>  extern void jump_label_lock(void);
>  extern void jump_label_unlock(void);

hmmm - looks this was on top of your previous patch?
Otherwise, looks good to me.

Thanks,

-Jason


> diff --git a/kernel/jump_label.c b/kernel/jump_label.c
> index a9b8cf5..6eaa84c 100644
> --- a/kernel/jump_label.c
> +++ b/kernel/jump_label.c
> @@ -18,6 +18,10 @@
>
>  #ifdef HAVE_JUMP_LABEL
>
> +/* Supplied by a linker script */
> +extern struct jump_entry __start___jump_table[];
> +extern struct jump_entry __stop___jump_table[];
> +
>  /* mutex to protect coming/going of the the jump_label table */
>  static DEFINE_MUTEX(jump_label_mutex);
>
>