Ha!  Ok, thanks for reviewing Jens.

On Thu, Aug 30, 2018 at 4:00 PM, Jens Axboe [off-list ref] wrote:

On 8/30/18 1:56 PM, John Pittman wrote:

quoted

Since commit 3942d2991852 ("mm/slab_common: allow NULL cache
pointer in kmem_cache_destroy()"), the kmem_cache_destroy()
function has been able to handle null pointers.  Remove NULL
check against e->icq_cache in elv_register(), simplifying the code.

You're the 3rd person sending in this patch this week :-)

http://git.kernel.dk/cgit/linux-block/commit/?h=for-linus&id=62d2a1940709198a522a43ff8be8b8f6b3654dec

--
Jens Axboe