The patch titled Subject: zpool: remove the list of pools_head has been removed from the -mm tree. Its filename was zpool-remove-the-list-of-pools_head.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Zhaoyu Liu <zackary.liu.pro@xxxxxxxxx> Subject: zpool: remove the list of pools_head The list of pools_head is no longer needed because the caller has been deleted in commit 479305fd7172 ("zpool: remove zpool_evict()"). Link: https://lkml.kernel.org/r/20211215163727.GA17196@pc Signed-off-by: Zhaoyu Liu <zackary.liu.pro@xxxxxxxxx> Cc: Dan Streetman <ddstreet@xxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/zpool.c | 12 ------------ 1 file changed, 12 deletions(-) --- a/mm/zpool.c~zpool-remove-the-list-of-pools_head +++ a/mm/zpool.c @@ -24,16 +24,11 @@ struct zpool { const struct zpool_ops *ops; bool evictable; bool can_sleep_mapped; - - struct list_head list; }; static LIST_HEAD(drivers_head); static DEFINE_SPINLOCK(drivers_lock); -static LIST_HEAD(pools_head); -static DEFINE_SPINLOCK(pools_lock); - /** * zpool_register_driver() - register a zpool implementation. * @driver: driver to register @@ -195,10 +190,6 @@ struct zpool *zpool_create_pool(const ch pr_debug("created pool type %s\n", type); - spin_lock(&pools_lock); - list_add(&zpool->list, &pools_head); - spin_unlock(&pools_lock); - return zpool; } @@ -217,9 +208,6 @@ void zpool_destroy_pool(struct zpool *zp { pr_debug("destroying pool type %s\n", zpool->driver->type); - spin_lock(&pools_lock); - list_del(&zpool->list); - spin_unlock(&pools_lock); zpool->driver->destroy(zpool->pool); zpool_put_driver(zpool->driver); kfree(zpool); _ Patches currently in -mm which might be from zackary.liu.pro@xxxxxxxxx are