Hi Philip,

On Tue, Aug 20, 2019 at 02:50:38PM +0800, Philip Li wrote:
> On Sun, Aug 18, 2019 at 09:25:04PM +0800, Gao Xiang wrote:
> > On Sun, Aug 18, 2019 at 09:17:52PM +0800, kbuild test robot wrote:
> > > Hi Gao,
> > > 
> > > I love your patch! Yet something to improve:
> > > 
> > > [auto build test ERROR on linus/master]
> > > [cannot apply to v5.3-rc4 next-20190816]
> > > [if your patch is applied to the wrong git tree, please drop us a note to 
> > > help improve the system]
> > 
> > ... those patches should be applied to staging tree
> > since linux-next has not been updated yet...
> thanks for the feedback, we will consider this to our todo list.

Yes, many confusing reports anyway...
(Just my personal suggestion, maybe we can add some hints on the patch email
to indicate which tree can be applied successfully for ci in the future...)

Thanks,
Gao Xiang

> 
> > 
> > Thanks,
> > Gao Xiang
> > 
> > > 
> > > url:    
> > > https://github.com/0day-ci/linux/commits/Gao-Xiang/staging-erofs-fix-an-error-handling-in-erofs_readdir/20190818-191344
> > > config: arm64-allyesconfig (attached as .config)
> > > compiler: aarch64-linux-gcc (GCC) 7.4.0
> > > reproduce:
> > >         wget 
> > > https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross 
> > > -O ~/bin/make.cross
> > >         chmod +x ~/bin/make.cross
> > >         # save the attached .config to linux build tree
> > >         GCC_VERSION=7.4.0 make.cross ARCH=arm64 
> > > 
> > > If you fix the issue, kindly add following tag
> > > Reported-by: kbuild test robot <l...@intel.com>
> > > 
> > > All errors (new ones prefixed by >>):
> > > 
> > >    drivers/staging/erofs/dir.c: In function 'erofs_readdir':
> > > >> drivers/staging/erofs/dir.c:110:11: error: 'EFSCORRUPTED' undeclared 
> > > >> (first use in this function); did you mean 'FS_NRSUPER'?
> > >        err = -EFSCORRUPTED;
> > >               ^~~~~~~~~~~~
> > >               FS_NRSUPER
> > >    drivers/staging/erofs/dir.c:110:11: note: each undeclared identifier 
> > > is reported only once for each function it appears in
> > > 
> > > vim +110 drivers/staging/erofs/dir.c
> > > 
> > >     85    
> > >     86    static int erofs_readdir(struct file *f, struct dir_context 
> > > *ctx)
> > >     87    {
> > >     88            struct inode *dir = file_inode(f);
> > >     89            struct address_space *mapping = dir->i_mapping;
> > >     90            const size_t dirsize = i_size_read(dir);
> > >     91            unsigned int i = ctx->pos / EROFS_BLKSIZ;
> > >     92            unsigned int ofs = ctx->pos % EROFS_BLKSIZ;
> > >     93            int err = 0;
> > >     94            bool initial = true;
> > >     95    
> > >     96            while (ctx->pos < dirsize) {
> > >     97                    struct page *dentry_page;
> > >     98                    struct erofs_dirent *de;
> > >     99                    unsigned int nameoff, maxsize;
> > >    100    
> > >    101                    dentry_page = read_mapping_page(mapping, i, 
> > > NULL);
> > >    102                    if (dentry_page == ERR_PTR(-ENOMEM)) {
> > >    103                            errln("no memory to readdir of logical 
> > > block %u of nid %llu",
> > >    104                                  i, EROFS_V(dir)->nid);
> > >    105                            err = -ENOMEM;
> > >    106                            break;
> > >    107                    } else if (IS_ERR(dentry_page)) {
> > >    108                            errln("fail to readdir of logical block 
> > > %u of nid %llu",
> > >    109                                  i, EROFS_V(dir)->nid);
> > >  > 110                            err = -EFSCORRUPTED;
> > >    111                            break;
> > >    112                    }
> > >    113    
> > >    114                    de = (struct erofs_dirent *)kmap(dentry_page);
> > >    115    
> > >    116                    nameoff = le16_to_cpu(de->nameoff);
> > >    117    
> > >    118                    if (unlikely(nameoff < sizeof(struct 
> > > erofs_dirent) ||
> > >    119                                 nameoff >= PAGE_SIZE)) {
> > >    120                            errln("%s, invalid de[0].nameoff %u",
> > >    121                                  __func__, nameoff);
> > >    122    
> > >    123                            err = -EIO;
> > >    124                            goto skip_this;
> > >    125                    }
> > >    126    
> > >    127                    maxsize = min_t(unsigned int,
> > >    128                                    dirsize - ctx->pos + ofs, 
> > > PAGE_SIZE);
> > >    129    
> > >    130                    /* search dirents at the arbitrary position */
> > >    131                    if (unlikely(initial)) {
> > >    132                            initial = false;
> > >    133    
> > >    134                            ofs = roundup(ofs, sizeof(struct 
> > > erofs_dirent));
> > >    135                            if (unlikely(ofs >= nameoff))
> > >    136                                    goto skip_this;
> > >    137                    }
> > >    138    
> > >    139                    err = erofs_fill_dentries(ctx, de, &ofs, 
> > > nameoff, maxsize);
> > >    140    skip_this:
> > >    141                    kunmap(dentry_page);
> > >    142    
> > >    143                    put_page(dentry_page);
> > >    144    
> > >    145                    ctx->pos = blknr_to_addr(i) + ofs;
> > >    146    
> > >    147                    if (unlikely(err))
> > >    148                            break;
> > >    149                    ++i;
> > >    150                    ofs = 0;
> > >    151            }
> > >    152            return err < 0 ? err : 0;
> > >    153    }
> > >    154    
> > > 
> > > ---
> > > 0-DAY kernel test infrastructure                Open Source Technology 
> > > Center
> > > https://lists.01.org/pipermail/kbuild-all                   Intel 
> > > Corporation
> > 
> > 
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