io_uring: Simplify the allocation of slab caches

commit 0a31bd5f ("KMEM_CACHE(): simplify slab cache creation")
introduces a new macro.
Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
to simplify the creation of SLAB caches.
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240130100247.81460-1-chentao@kylinos.cnSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -4176,9 +4176,8 @@ static int __init io_uring_init(void)
 				SLAB_ACCOUNT | SLAB_TYPESAFE_BY_RCU,
 				offsetof(struct io_kiocb, cmd.data),
 				sizeof_field(struct io_kiocb, cmd.data), NULL);
-	io_buf_cachep = kmem_cache_create("io_buffer", sizeof(struct io_buffer), 0,
-					  SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT,
-					  NULL);
+	io_buf_cachep = KMEM_CACHE(io_buffer,
+					  SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT);
 
 #ifdef CONFIG_SYSCTL
 	register_sysctl_init("kernel", kernel_io_uring_disabled_table);