linux-kernel - [isilence:zc_v3 25/29] io_uring/net.c:746:41: warning: cast from pointer to integer of different size

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Date:   Wed, 6 Jul 2022 10:35:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Pavel Begunkov <asml.silence@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [isilence:zc_v3 25/29] io_uring/net.c:746:41: warning: cast from
 pointer to integer of different size

tree:   https://github.com/isilence/linux zc_v3
head:   c52112ad973c15ca7aabe9acad36cfeee093f2e1
commit: fa16929e045f5ac6150e90b57640cec185473888 [25/29] io_uring: sendzc with fixed buffers
config: i386-randconfig-a003
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/isilence/linux/commit/fa16929e045f5ac6150e90b57640cec185473888
        git remote add isilence https://github.com/isilence/linux
        git fetch --no-tags isilence zc_v3
        git checkout fa16929e045f5ac6150e90b57640cec185473888
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   io_uring/net.c: In function 'io_sendzc':
>> io_uring/net.c:746:41: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     746 |                                         (u64)zc->buf, zc->len);
         |                                         ^


vim +746 io_uring/net.c

   707	
   708	int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
   709	{
   710		struct sockaddr_storage address;
   711		struct io_ring_ctx *ctx = req->ctx;
   712		struct io_sendzc *zc = io_kiocb_to_cmd(req);
   713		struct io_notif_slot *notif_slot;
   714		struct io_notif *notif;
   715		struct msghdr msg;
   716		struct iovec iov;
   717		struct socket *sock;
   718		unsigned msg_flags;
   719		int ret, min_ret = 0;
   720	
   721		if (!(req->flags & REQ_F_POLLED) &&
   722		    (zc->flags & IORING_RECVSEND_POLL_FIRST))
   723			return -EAGAIN;
   724	
   725		if (issue_flags & IO_URING_F_UNLOCKED)
   726			return -EAGAIN;
   727		sock = sock_from_file(req->file);
   728		if (unlikely(!sock))
   729			return -ENOTSOCK;
   730	
   731		notif_slot = io_get_notif_slot(ctx, zc->slot_idx);
   732		if (!notif_slot)
   733			return -EINVAL;
   734		notif = io_get_notif(ctx, notif_slot);
   735		if (!notif)
   736			return -ENOMEM;
   737	
   738		msg.msg_name = NULL;
   739		msg.msg_control = NULL;
   740		msg.msg_controllen = 0;
   741		msg.msg_namelen = 0;
   742		msg.msg_managed_data = 1;
   743	
   744		if (zc->flags & IORING_RECVSEND_FIXED_BUF) {
   745			ret = io_import_fixed(WRITE, &msg.msg_iter, req->imu,
 > 746						(u64)zc->buf, zc->len);
   747			if (unlikely(ret))
   748					return ret;
   749		} else {
   750			msg.msg_managed_data = 0;
   751			ret = import_single_range(WRITE, zc->buf, zc->len, &iov,
   752						  &msg.msg_iter);
   753			if (unlikely(ret))
   754				return ret;
   755			mm_account_pinned_pages(&notif->uarg.mmp, zc->len);
   756		}
   757	
   758		if (zc->addr) {
   759			ret = move_addr_to_kernel(zc->addr, zc->addr_len, &address);
   760			if (unlikely(ret < 0))
   761				return ret;
   762			msg.msg_name = (struct sockaddr *)&address;
   763			msg.msg_namelen = zc->addr_len;
   764		}
   765	
   766		msg_flags = zc->msg_flags | MSG_ZEROCOPY;
   767		if (issue_flags & IO_URING_F_NONBLOCK)
   768			msg_flags |= MSG_DONTWAIT;
   769		if (msg_flags & MSG_WAITALL)
   770			min_ret = iov_iter_count(&msg.msg_iter);
   771	
   772		msg.msg_flags = msg_flags;
   773		msg.msg_ubuf = &notif->uarg;
   774		ret = sock_sendmsg(sock, &msg);
   775	
   776		if (unlikely(ret < min_ret)) {
   777			if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK))
   778				return -EAGAIN;
   779			return ret == -ERESTARTSYS ? -EINTR : ret;
   780		}
   781	
   782		io_req_set_res(req, ret, 0);
   783		return IOU_OK;
   784	}
   785	

-- 
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