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SubjectRe: [PATCH] jump_label: mark __start/stop___jump_table const
On Thu, Feb 09, 2017 at 11:11:32PM +0200, Michael S. Tsirkin wrote:
> Attempts to assign values through these pointers would fail.
> Mark them const to make sure the failure is compile time.
>
> Cc: Jason Baron <jbaron@akamai.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Mel Gorman <mgorman@suse.de>
> Cc: Ingo Molnar <mingo@kernel.org>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Hmm this produces a bunch of warnings that I managed
to somehow miss. Self-Nack. Pls disregard.

> ---
> include/linux/jump_label.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
> index a0547c5..48ed83f 100644
> --- a/include/linux/jump_label.h
> +++ b/include/linux/jump_label.h
> @@ -132,8 +132,8 @@ static __always_inline bool static_key_true(struct static_key *key)
> return !arch_static_branch(key, true);
> }
>
> -extern struct jump_entry __start___jump_table[];
> -extern struct jump_entry __stop___jump_table[];
> +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);
> --
> MST

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