2 files changed, 1 insertions, 48 deletions

diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 91a02eeeb319..9a10313d0670 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -154,17 +154,6 @@ config MD_RAID456
 
           If unsure, say Y.
 
-config MULTICORE_RAID456
-        bool "RAID-4/RAID-5/RAID-6 Multicore processing (EXPERIMENTAL)"
-        depends on MD_RAID456
-        depends on SMP
-        depends on EXPERIMENTAL
-        ---help---
-          Enable the raid456 module to dispatch per-stripe raid operations to a
-          thread pool.
-
-          If unsure, say N.
-
 config MD_MULTIPATH
         tristate "Multipath I/O support"
         depends on BLK_DEV_MD
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 19d77a026639..35031c8b2d02 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1406,7 +1406,7 @@ static void ops_run_check_pq(struct stripe_head *sh, struct raid5_percpu *percpu
                            &sh->ops.zero_sum_result, percpu->spare_page, &submit);
 }
 
-static void __raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
+static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
 {
         int overlap_clear = 0, i, disks = sh->disks;
         struct dma_async_tx_descriptor *tx = NULL;
@@ -1471,36 +1471,6 @@ static void __raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
         put_cpu();
 }
 
-#ifdef CONFIG_MULTICORE_RAID456
-static void async_run_ops(void *param, async_cookie_t cookie)
-{
-        struct stripe_head *sh = param;
-        unsigned long ops_request = sh->ops.request;
-
-        clear_bit_unlock(STRIPE_OPS_REQ_PENDING, &sh->state);
-        wake_up(&sh->ops.wait_for_ops);
-
-        __raid_run_ops(sh, ops_request);
-        release_stripe(sh);
-}
-
-static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
-{
-        /* since handle_stripe can be called outside of raid5d context
-         * we need to ensure sh->ops.request is de-staged before another
-         * request arrives
-         */
-        wait_event(sh->ops.wait_for_ops,
-                   !test_and_set_bit_lock(STRIPE_OPS_REQ_PENDING, &sh->state));
-        sh->ops.request = ops_request;
-
-        atomic_inc(&sh->count);
-        async_schedule(async_run_ops, sh);
-}
-#else
-#define raid_run_ops __raid_run_ops
-#endif
-
 static int grow_one_stripe(struct r5conf *conf)
 {
         struct stripe_head *sh;
@@ -1509,9 +1479,6 @@ static int grow_one_stripe(struct r5conf *conf)
                 return 0;
 
         sh->raid_conf = conf;
-        #ifdef CONFIG_MULTICORE_RAID456
-        init_waitqueue_head(&sh->ops.wait_for_ops);
-        #endif
 
         spin_lock_init(&sh->stripe_lock);
 
@@ -1630,9 +1597,6 @@ static int resize_stripes(struct r5conf *conf, int newsize)
                         break;
 
                 nsh->raid_conf = conf;
-                #ifdef CONFIG_MULTICORE_RAID456
-                init_waitqueue_head(&nsh->ops.wait_for_ops);
-                #endif
                 spin_lock_init(&nsh->stripe_lock);
 
                 list_add(&nsh->lru, &newstripes);