io_uring: specify freeptr usage for SLAB_TYPESAFE_BY_RCU io_kiocb cache

Doesn't matter right now as there's still some bytes left for it, but
let's prepare for the io_kiocb potentially growing and add a specific
freeptr offset for it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 2863b95..a09c67b 100644 (file)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3846,6 +3846,8 @@ static int __init io_uring_init(void)
        struct kmem_cache_args kmem_args = {
                .useroffset = offsetof(struct io_kiocb, cmd.data),
                .usersize = sizeof_field(struct io_kiocb, cmd.data),
+               .freeptr_offset = offsetof(struct io_kiocb, work),
+               .use_freeptr_offset = true,
        };
 
 #define __BUILD_BUG_VERIFY_OFFSET_SIZE(stype, eoffset, esize, ename) do { \