tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.14/io_uring head: 7a778f9dc32deae4f748903f6f9169dc01cbcd28 commit: a3dbdf54da80326fd12bc11ad75ecd699a82374f [59/64] io_uring: refactor io_get_sequence() compiler: hppa-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; cppcheck warnings: (new ones prefixed by >>) >> fs/io_uring.c:5999:2: warning: Redundant assignment of 'req' to itself. [selfAssignment] io_for_each_link(req, req) ^ cppcheck possible warnings: (new ones prefixed by >>, may not real problems) fs/io_uring.c:5305:19: warning: Uninitialized variable: req [uninitvar] if (sqe_addr != req->user_data) ^ fs/io_uring.c:5309:10: warning: Uninitialized variable: req [uninitvar] return req; ^ fs/io_uring.c:9491:46: warning: Uninitialized variable: req [uninitvar] seq_printf(m, " op=%d, task_works=%dn", req->opcode, ^ fs/io_uring.c:9492:6: warning: Uninitialized variable: req [uninitvar] req->task->task_works != NULL); ^ vim +/req +5999 fs/io_uring.c 5993 5994 static u32 io_get_sequence(struct io_kiocb *req) 5995 { 5996 u32 seq = req->ctx->cached_sq_head; 5997 5998 /* need original cached_sq_head, but it was increased for each req */ > 5999 io_for_each_link(req, req)