[fscrypt:fscrypt-dio-support 4/15] block/blk-crypto-fallback.c:225:28: error: 'len' undeclared

[fscrypt:fscrypt-dio-support 4/15] block/blk-crypto-fallback.c:225:28: error: 'len' undeclared

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git fscrypt-dio-support
head:   7bf5b39672a543edac8dcce75e57758563a7ca6b
commit: 3ec1c215d23bd5c4381368a60deb057164a84230 [4/15] block: respect blk_crypto_bio_sectors_alignment() in blk-crypto-fallback
config: h8300-randconfig-r003-20210211 (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
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
        # https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git/commit/?id=3ec1c215d23bd5c4381368a60deb057164a84230
        git remote add fscrypt https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git
        git fetch --no-tags fscrypt fscrypt-dio-support
        git checkout 3ec1c215d23bd5c4381368a60deb057164a84230
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 

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 >>):

   In file included from include/linux/kernel.h:13,
                    from include/linux/crypto.h:16,
                    from include/crypto/skcipher.h:11,
                    from block/blk-crypto-fallback.c:12:
   block/blk-crypto-fallback.c: In function 'blk_crypto_split_bio_if_needed':
>> block/blk-crypto-fallback.c:225:28: error: 'len' undeclared (first use in this function)
     225 |   num_sectors = round_down(len,
         |                            ^~~
   include/linux/math.h:34:28: note: in definition of macro 'round_down'
      34 | #define round_down(x, y) ((x) & ~__round_mask(x, y))
         |                            ^
   block/blk-crypto-fallback.c:225:28: note: each undeclared identifier is reported only once for each function it appears in
     225 |   num_sectors = round_down(len,
         |                            ^~~
   include/linux/math.h:34:28: note: in definition of macro 'round_down'
      34 | #define round_down(x, y) ((x) & ~__round_mask(x, y))
         |                            ^


vim +/len +225 block/blk-crypto-fallback.c

   208	
   209	static bool blk_crypto_split_bio_if_needed(struct bio **bio_ptr)
   210	{
   211		struct bio *bio = *bio_ptr;
   212		unsigned int i = 0;
   213		unsigned int num_sectors = 0;
   214		struct bio_vec bv;
   215		struct bvec_iter iter;
   216	
   217		bio_for_each_segment(bv, bio, iter) {
   218			num_sectors += bv.bv_len >> SECTOR_SHIFT;
   219			if (++i == BIO_MAX_PAGES)
   220				break;
   221		}
   222		if (num_sectors < bio_sectors(bio)) {
   223			struct bio *split_bio;
   224	
 > 225			num_sectors = round_down(len,
   226						 blk_crypto_bio_sectors_alignment(bio));
   227			split_bio = bio_split(bio, num_sectors, GFP_NOIO, NULL);
   228			if (!split_bio) {
   229				bio->bi_status = BLK_STS_RESOURCE;
   230				return false;
   231			}
   232			bio_chain(split_bio, bio);
   233			submit_bio_noacct(bio);
   234			*bio_ptr = split_bio;
   235		}
   236	
   237		return true;
   238	}
   239	

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

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