diff options
| author |   Pavel Begunkov <asml.silence@gmail.com> | 2020-10-18 10:17:38 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-10-19 13:29:29 -0600 |
| commit | ec99ca6c4747bc7b024b35e0326694fe4f8ad140 (patch) | |
| tree | 37d3e393cceb6724bdf10293d9fe022778a8e966 /fs/io_uring.c | |
| parent | io_uring: flags-based creds init in queue (diff) | |
| download | linux-dev-ec99ca6c4747bc7b024b35e0326694fe4f8ad140.tar.xz linux-dev-ec99ca6c4747bc7b024b35e0326694fe4f8ad140.zip | |
io_uring: kill ref get/drop in personality init
Don't take an identity on personality/creds init only to drop it a few
lines after. Extract a function which prepares req->work but leaves it
without identity.
Note: it's safe to not check REQ_F_WORK_INITIALIZED there because it's
nobody had a chance to init it before io_init_req().
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index e9e8006fdf2e..b96ef251afaf 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1070,6 +1070,12 @@ static void io_init_identity(struct io_identity *id) refcount_set(&id->count, 1); } +static inline void __io_req_init_async(struct io_kiocb *req) +{ + memset(&req->work, 0, sizeof(req->work)); + req->flags |= REQ_F_WORK_INITIALIZED; +} + /* * Note: must call io_req_init_async() for the first time you * touch any members of io_wq_work. @@ -1081,8 +1087,7 @@ static inline void io_req_init_async(struct io_kiocb *req) if (req->flags & REQ_F_WORK_INITIALIZED) return; - memset(&req->work, 0, sizeof(req->work)); - req->flags |= REQ_F_WORK_INITIALIZED; + __io_req_init_async(req); /* Grab a ref if this isn't our static identity */ req->work.identity = tctx->identity; @@ -6504,12 +6509,12 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req, if (id) { struct io_identity *iod; - io_req_init_async(req); iod = idr_find(&ctx->personality_idr, id); if (unlikely(!iod)) return -EINVAL; refcount_inc(&iod->count); - io_put_identity(current->io_uring, req); + + __io_req_init_async(req); get_cred(iod->creds); req->work.identity = iod; req->work.flags |= IO_WQ_WORK_CREDS; |