diff options
| author | Tejun Heo <tj@kernel.org> | 2018-03-14 12:45:15 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-03-19 10:12:03 -0700 |
| commit | f729863a8c9693527257e63975f615b53ee7622e (patch) | |
| tree | 1ebcd741e6919ed9935c7ed54875623ef8584515 /fs/aio.c | |
| parent | 8f36aaec9c929f2864196b0799203491f6a67dc6 (diff) | |
| download | lwn-f729863a8c9693527257e63975f615b53ee7622e.tar.gz lwn-f729863a8c9693527257e63975f615b53ee7622e.zip | |
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: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'fs/aio.c')
| -rw-r--r-- | fs/aio.c | 21 |
1 files changed, 6 insertions, 15 deletions
@@ -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, + free_rwork); pr_debug("freeing %p\n", ctx); aio_free_ring(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); - schedule_work(&ctx->free_work); -} - 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) complete(&ctx->rq_wait->comp); /* 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); } /* |