On Tue, May 12, 2015 at 02:18:41PM -0700, Paul E. McKenney wrote:
> From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
>
> Because mce is arch-specific x86 code, there is little or no
> performance benefit of using rcu_dereference_index_check() over using
> smp_load_acquire(). It also turns out that mce is the only place that
> array-index-based RCU is used, and it would be convenient to drop
> this portion of the RCU API.
>
> This patch therefore changes rcu_dereference_index_check() uses to
> smp_load_acquire(), but keeping the lockdep diagnostics, and also
> changes rcu_access_index() uses to READ_ONCE().
>
> Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
> Cc: linux-e...@vger.kernel.org
> Cc: Tony Luck <tony.l...@intel.com>
> Cc: Borislav Petkov <b...@alien8.de>
Looks good to me.
If it is easier for you carrying it in your tree:
Acked-by: Borislav Petkov <b...@suse.de>
Otherwise, let me know.
Thanks.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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