block, cfq: kill ioc_gone

Now that cic's are immediately unlinked under both locks, there's no
need to count and drain cic's before module unload.  RCU callback
completion is waited with rcu_barrier().

While at it, remove residual RCU operations on cic_list.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 17 deletions

diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 581dd1bd3d3e..02604c89ddde 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -196,22 +196,5 @@ enum {
         INIT_LIST_HEAD(&(rq)->csd.list);        \
         } while (0)
 
-/*
- * io context count accounting
- */
-#define elv_ioc_count_mod(name, __val) this_cpu_add(name, __val)
-#define elv_ioc_count_inc(name) this_cpu_inc(name)
-#define elv_ioc_count_dec(name) this_cpu_dec(name)
-
-#define elv_ioc_count_read(name)                                \
-({                                                              \
-        unsigned long __val = 0;                                \
-        int __cpu;                                              \
-        smp_wmb();                                              \
-        for_each_possible_cpu(__cpu)                            \
-                __val += per_cpu(name, __cpu);                  \
-        __val;                                                  \
-})
-
 #endif /* CONFIG_BLOCK */
 #endif