[hch-block:bvec-kmap 49/49] drivers/block/floppy.c:2489:33: error: incompatible pointer types passing 'struct page **' to parameter of type 'struct bio_vec *'

[hch-block:bvec-kmap 49/49] drivers/block/floppy.c:2489:33: error: incompatible pointer types passing 'struct page **' to parameter of type 'struct bio_vec *'

[kernel test robot]

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tree:   git://git.infradead.org/users/hch/block.git bvec-kmap
head:   60857617af49088613b68d16c6164ad671a81517
commit: 60857617af49088613b68d16c6164ad671a81517 [49/49] floppy: use memcpy_{to,from}_bvec
config: x86_64-randconfig-a003-20210523 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project b4fd512c36ca344a3ff69350219e8b0a67e9472a)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git remote add hch-block git://git.infradead.org/users/hch/block.git
        git fetch --no-tags hch-block bvec-kmap
        git checkout 60857617af49088613b68d16c6164ad671a81517
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/block/floppy.c:2489:33: error: incompatible pointer types passing 'struct page **' to parameter of type 'struct bio_vec *' [-Werror,-Wincompatible-pointer-types]
                           memcpy_from_bvec(dma_buffer, &bv.bv_page);
                                                        ^~~~~~~~~~~
   include/linux/bvec.h:197:63: note: passing argument to parameter 'bvec' here
   static inline void memcpy_from_bvec(char *to, struct bio_vec *bvec)
                                                                 ^
   1 error generated.


vim +2489 drivers/block/floppy.c

  2424	
  2425	/*
  2426	 * Move data from/to the track buffer to/from the buffer cache.
  2427	 */
  2428	static void copy_buffer(int ssize, int max_sector, int max_sector_2)
  2429	{
  2430		int remaining;		/* number of transferred 512-byte sectors */
  2431		struct bio_vec bv;
  2432		char *dma_buffer;
  2433		int size;
  2434		struct req_iterator iter;
  2435	
  2436		max_sector = transfer_size(ssize,
  2437					   min(max_sector, max_sector_2),
  2438					   blk_rq_sectors(current_req));
  2439	
  2440		if (current_count_sectors <= 0 && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE &&
  2441		    buffer_max > fsector_t + blk_rq_sectors(current_req))
  2442			current_count_sectors = min_t(int, buffer_max - fsector_t,
  2443						      blk_rq_sectors(current_req));
  2444	
  2445		remaining = current_count_sectors << 9;
  2446		if (remaining > blk_rq_bytes(current_req) && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
  2447			DPRINT("in copy buffer\n");
  2448			pr_info("current_count_sectors=%ld\n", current_count_sectors);
  2449			pr_info("remaining=%d\n", remaining >> 9);
  2450			pr_info("current_req->nr_sectors=%u\n",
  2451				blk_rq_sectors(current_req));
  2452			pr_info("current_req->current_nr_sectors=%u\n",
  2453				blk_rq_cur_sectors(current_req));
  2454			pr_info("max_sector=%d\n", max_sector);
  2455			pr_info("ssize=%d\n", ssize);
  2456		}
  2457	
  2458		buffer_max = max(max_sector, buffer_max);
  2459	
  2460		dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
  2461	
  2462		size = blk_rq_cur_bytes(current_req);
  2463	
  2464		rq_for_each_segment(bv, current_req, iter) {
  2465			if (!remaining)
  2466				break;
  2467	
  2468			size = bv.bv_len;
  2469			SUPBOUND(size, remaining);
  2470			if (dma_buffer + size >
  2471			    floppy_track_buffer + (max_buffer_sectors << 10) ||
  2472			    dma_buffer < floppy_track_buffer) {
  2473				DPRINT("buffer overrun in copy buffer %d\n",
  2474				       (int)((floppy_track_buffer - dma_buffer) >> 9));
  2475				pr_info("fsector_t=%d buffer_min=%d\n",
  2476					fsector_t, buffer_min);
  2477				pr_info("current_count_sectors=%ld\n",
  2478					current_count_sectors);
  2479				if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
  2480					pr_info("read\n");
  2481				if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE)
  2482					pr_info("write\n");
  2483				break;
  2484			}
  2485	
  2486			if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
  2487				memcpy_to_bvec(&bv, dma_buffer);
  2488			else
> 2489				memcpy_from_bvec(dma_buffer, &bv.bv_page);
  2490	
  2491			remaining -= size;
  2492			dma_buffer += size;
  2493		}
  2494		if (remaining) {
  2495			if (remaining > 0)
  2496				max_sector -= remaining >> 9;
  2497			DPRINT("weirdness: remaining %d\n", remaining >> 9);
  2498		}
  2499	}
  2500	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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