fs/hfsplus/wrapper.c:49: warning: Function parameter or member 'opf' not described in 'hfsplus_submit_bio'
From: kernel test robot
Date: Thu Aug 17 2023 - 04:42:50 EST
Hi Bart,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6
commit: c85f99929ea66c357199b6a3fe958745e1190f5a fs/hfsplus: Use the enum req_op and blk_opf_t types
date: 1 year, 1 month ago
config: i386-randconfig-i051-20230817 (https://download.01.org/0day-ci/archive/20230817/202308171653.oSQN42xP-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230817/202308171653.oSQN42xP-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308171653.oSQN42xP-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> fs/hfsplus/wrapper.c:49: warning: Function parameter or member 'opf' not described in 'hfsplus_submit_bio'
>> fs/hfsplus/wrapper.c:49: warning: Excess function parameter 'op' description in 'hfsplus_submit_bio'
>> fs/hfsplus/wrapper.c:49: warning: Excess function parameter 'op_flags' description in 'hfsplus_submit_bio'
vim +49 fs/hfsplus/wrapper.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 26
915ab236d3c491 Fabian Frederick 2014-06-06 27 /**
915ab236d3c491 Fabian Frederick 2014-06-06 28 * hfsplus_submit_bio - Perform block I/O
6596528e391ad9 Seth Forshee 2011-07-18 29 * @sb: super block of volume for I/O
6596528e391ad9 Seth Forshee 2011-07-18 30 * @sector: block to read or write, for blocks of HFSPLUS_SECTOR_SIZE bytes
6596528e391ad9 Seth Forshee 2011-07-18 31 * @buf: buffer for I/O
6596528e391ad9 Seth Forshee 2011-07-18 32 * @data: output pointer for location of requested data
67ed25961c428a Mike Christie 2016-06-05 33 * @op: direction of I/O
67ed25961c428a Mike Christie 2016-06-05 34 * @op_flags: request op flags
6596528e391ad9 Seth Forshee 2011-07-18 35 *
6596528e391ad9 Seth Forshee 2011-07-18 36 * The unit of I/O is hfsplus_min_io_size(sb), which may be bigger than
6596528e391ad9 Seth Forshee 2011-07-18 37 * HFSPLUS_SECTOR_SIZE, and @buf must be sized accordingly. On reads
6596528e391ad9 Seth Forshee 2011-07-18 38 * @data will return a pointer to the start of the requested sector,
6596528e391ad9 Seth Forshee 2011-07-18 39 * which may not be the same location as @buf.
6596528e391ad9 Seth Forshee 2011-07-18 40 *
6596528e391ad9 Seth Forshee 2011-07-18 41 * If @sector is not aligned to the bdev logical block size it will
6596528e391ad9 Seth Forshee 2011-07-18 42 * be rounded down. For writes this means that @buf should contain data
6596528e391ad9 Seth Forshee 2011-07-18 43 * that starts at the rounded-down address. As long as the data was
6596528e391ad9 Seth Forshee 2011-07-18 44 * read using hfsplus_submit_bio() and the same buffer is used things
6596528e391ad9 Seth Forshee 2011-07-18 45 * will work correctly.
6596528e391ad9 Seth Forshee 2011-07-18 46 */
6596528e391ad9 Seth Forshee 2011-07-18 47 int hfsplus_submit_bio(struct super_block *sb, sector_t sector,
c85f99929ea66c Bart Van Assche 2022-07-14 48 void *buf, void **data, blk_opf_t opf)
52399b171dfaea Christoph Hellwig 2010-11-23 @49 {
c85f99929ea66c Bart Van Assche 2022-07-14 50 const enum req_op op = opf & REQ_OP_MASK;
52399b171dfaea Christoph Hellwig 2010-11-23 51 struct bio *bio;
50176ddefa4a94 Seth Forshee 2011-05-31 52 int ret = 0;
a6dc8c04218eb7 Janne Kalliomäki 2012-06-17 53 u64 io_size;
6596528e391ad9 Seth Forshee 2011-07-18 54 loff_t start;
6596528e391ad9 Seth Forshee 2011-07-18 55 int offset;
6596528e391ad9 Seth Forshee 2011-07-18 56
6596528e391ad9 Seth Forshee 2011-07-18 57 /*
6596528e391ad9 Seth Forshee 2011-07-18 58 * Align sector to hardware sector size and find offset. We
6596528e391ad9 Seth Forshee 2011-07-18 59 * assume that io_size is a power of two, which _should_
6596528e391ad9 Seth Forshee 2011-07-18 60 * be true.
6596528e391ad9 Seth Forshee 2011-07-18 61 */
6596528e391ad9 Seth Forshee 2011-07-18 62 io_size = hfsplus_min_io_size(sb);
6596528e391ad9 Seth Forshee 2011-07-18 63 start = (loff_t)sector << HFSPLUS_SECTOR_SHIFT;
6596528e391ad9 Seth Forshee 2011-07-18 64 offset = start & (io_size - 1);
6596528e391ad9 Seth Forshee 2011-07-18 65 sector &= ~((io_size >> HFSPLUS_SECTOR_SHIFT) - 1);
52399b171dfaea Christoph Hellwig 2010-11-23 66
c85f99929ea66c Bart Van Assche 2022-07-14 67 bio = bio_alloc(sb->s_bdev, 1, opf, GFP_NOIO);
4f024f3797c43c Kent Overstreet 2013-10-11 68 bio->bi_iter.bi_sector = sector;
52399b171dfaea Christoph Hellwig 2010-11-23 69
c85f99929ea66c Bart Van Assche 2022-07-14 70 if (op != REQ_OP_WRITE && data)
6596528e391ad9 Seth Forshee 2011-07-18 71 *data = (u8 *)buf + offset;
6596528e391ad9 Seth Forshee 2011-07-18 72
6596528e391ad9 Seth Forshee 2011-07-18 73 while (io_size > 0) {
6596528e391ad9 Seth Forshee 2011-07-18 74 unsigned int page_offset = offset_in_page(buf);
6596528e391ad9 Seth Forshee 2011-07-18 75 unsigned int len = min_t(unsigned int, PAGE_SIZE - page_offset,
6596528e391ad9 Seth Forshee 2011-07-18 76 io_size);
6596528e391ad9 Seth Forshee 2011-07-18 77
6596528e391ad9 Seth Forshee 2011-07-18 78 ret = bio_add_page(bio, virt_to_page(buf), len, page_offset);
6596528e391ad9 Seth Forshee 2011-07-18 79 if (ret != len) {
6596528e391ad9 Seth Forshee 2011-07-18 80 ret = -EIO;
6596528e391ad9 Seth Forshee 2011-07-18 81 goto out;
6596528e391ad9 Seth Forshee 2011-07-18 82 }
6596528e391ad9 Seth Forshee 2011-07-18 83 io_size -= len;
6596528e391ad9 Seth Forshee 2011-07-18 84 buf = (u8 *)buf + len;
6596528e391ad9 Seth Forshee 2011-07-18 85 }
52399b171dfaea Christoph Hellwig 2010-11-23 86
4e49ea4a3d2763 Mike Christie 2016-06-05 87 ret = submit_bio_wait(bio);
6596528e391ad9 Seth Forshee 2011-07-18 88 out:
50176ddefa4a94 Seth Forshee 2011-05-31 89 bio_put(bio);
6596528e391ad9 Seth Forshee 2011-07-18 90 return ret < 0 ? ret : 0;
52399b171dfaea Christoph Hellwig 2010-11-23 91 }
52399b171dfaea Christoph Hellwig 2010-11-23 92
:::::: The code at line 49 was first introduced by commit
:::::: 52399b171dfaea02b6944cd6feba49b624147126 hfsplus: use raw bio access for the volume headers
:::::: TO: Christoph Hellwig <hch@xxxxxxxxxx>
:::::: CC: Christoph Hellwig <hch@xxxxxx>
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