Commit f729863a authored by Tejun Heo's avatar Tejun Heo
Browse files

fs/aio: Use rcu_work instead of explicit rcu and work item

Workqueue now has rcu_work.  Use it instead of open-coding rcu -> work
item bouncing.
Signed-off-by: default avatarTejun Heo <>
parent 8f36aaec
......@@ -115,8 +115,7 @@ struct kioctx {
struct page **ring_pages;
long nr_pages;
struct rcu_head free_rcu;
struct work_struct free_work; /* see free_ioctx() */
struct rcu_work free_rwork; /* see free_ioctx() */
* signals when all in-flight requests are done
......@@ -592,13 +591,12 @@ static int kiocb_cancel(struct aio_kiocb *kiocb)
* free_ioctx() should be RCU delayed to synchronize against the RCU
* protected lookup_ioctx() and also needs process context to call
* aio_free_ring(), so the double bouncing through kioctx->free_rcu and
* ->free_work.
* aio_free_ring(). Use rcu_work.
static void free_ioctx(struct work_struct *work)
struct kioctx *ctx = container_of(work, struct kioctx, free_work);
struct kioctx *ctx = container_of(to_rcu_work(work), struct kioctx,
pr_debug("freeing %p\n", ctx);
......@@ -608,14 +606,6 @@ static void free_ioctx(struct work_struct *work)
kmem_cache_free(kioctx_cachep, ctx);
static void free_ioctx_rcufn(struct rcu_head *head)
struct kioctx *ctx = container_of(head, struct kioctx, free_rcu);
INIT_WORK(&ctx->free_work, free_ioctx);
static void free_ioctx_reqs(struct percpu_ref *ref)
struct kioctx *ctx = container_of(ref, struct kioctx, reqs);
......@@ -625,7 +615,8 @@ static void free_ioctx_reqs(struct percpu_ref *ref)
/* Synchronize against RCU protected table->table[] dereferences */
call_rcu(&ctx->free_rcu, free_ioctx_rcufn);
INIT_RCU_WORK(&ctx->free_rwork, free_ioctx);
queue_rcu_work(system_wq, &ctx->free_rwork);
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