diff options
| author | Roman Gushchin <guro@fb.com> | 2019-05-07 10:01:48 -0700 |
|---|---|---|
| committer | Dennis Zhou <dennis@kernel.org> | 2019-05-09 10:50:30 -0700 |
| commit | 214828962dead0c698f92b60ef97ce3c5fc2c8fe (patch) | |
| tree | 31ef85d837693d35843ff56d719d89db4950794f /fs/io_uring.c | |
| parent | 09ed79d6d75f06cc963a78f25463251b0a758dc7 (diff) | |
| download | lwn-214828962dead0c698f92b60ef97ce3c5fc2c8fe.tar.gz lwn-214828962dead0c698f92b60ef97ce3c5fc2c8fe.zip | |
io_uring: initialize percpu refcounters using PERCU_REF_ALLOW_REINIT
Percpu reference counters should now be initialized with the
PERCPU_REF_ALLOW_REINIT in order to allow switching them to the
percpu mode from the atomic mode. This is exactly what
percpu_ref_reinit() called from __io_uring_register() is supposed to
do. So let's initialize percpu refcounters with the
PERCU_REF_ALLOW_REINIT flag.
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 84efb8956734..083c5dd95452 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -389,7 +389,8 @@ static struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p) if (!ctx) return NULL; - if (percpu_ref_init(&ctx->refs, io_ring_ctx_ref_free, 0, GFP_KERNEL)) { + if (percpu_ref_init(&ctx->refs, io_ring_ctx_ref_free, + PERCPU_REF_ALLOW_REINIT, GFP_KERNEL)) { kfree(ctx); return NULL; } |