Subject: Re: linux-next: build failure after merge of the staging tree

From: Chao Yu <[email-masked]>
Date: Wed, 1 Aug 2018 17:09:13 +0800

Hi Stephen,

On 2018/7/30 14:31, Gao Xiang wrote:
> Hi Stephen,
> 
> On 2018/7/30 14:16, Stephen Rothwell wrote:
>> Hi Greg,
>>
>> After merging the staging tree, today's linux-next build (x86_64
>> allmodconfig) failed like this:
>>
>> drivers/staging/erofs/super.c: In function 'erofs_read_super':
>> drivers/staging/erofs/super.c:343:17: error: 'MS_RDONLY' undeclared (first use in this function); did you mean 'IS_RDONLY'?
>>   sb->s_flags |= MS_RDONLY | MS_NOATIME;
>>                  ^~~~~~~~~
>>                  IS_RDONLY
>> drivers/staging/erofs/super.c:343:17: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/staging/erofs/super.c:343:29: error: 'MS_NOATIME' undeclared (first use in this function); did you mean 'S_NOATIME'?
>>   sb->s_flags |= MS_RDONLY | MS_NOATIME;
>>                              ^~~~~~~~~~
>>                              S_NOATIME
>> drivers/staging/erofs/super.c: In function 'erofs_mount':
>> drivers/staging/erofs/super.c:501:10: warning: passing argument 5 of 'mount_bdev' makes integer from pointer without a cast [-Wint-conversion]
>>    &priv, erofs_fill_super);
>>           ^~~~~~~~~~~~~~~~
>> In file included from include/linux/buffer_head.h:12:0,
>>                  from drivers/staging/erofs/super.c:14:
>> include/linux/fs.h:2151:23: note: expected 'size_t {aka long unsigned int}' but argument is of type 'int (*)(struct super_block *, void *, int)'
>>  extern struct dentry *mount_bdev(struct file_system_type *fs_type,
>>                        ^~~~~~~~~~
>> drivers/staging/erofs/super.c:500:9: error: too few arguments to function 'mount_bdev'
>>   return mount_bdev(fs_type, flags, dev_name,
>>          ^~~~~~~~~~
>> In file included from include/linux/buffer_head.h:12:0,
>>                  from drivers/staging/erofs/super.c:14:
>> include/linux/fs.h:2151:23: note: declared here
>>  extern struct dentry *mount_bdev(struct file_system_type *fs_type,
>>                        ^~~~~~~~~~
>> drivers/staging/erofs/super.c: At top level:
>> drivers/staging/erofs/super.c:518:20: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
>>   .mount          = erofs_mount,
>>                     ^~~~~~~~~~~
>> drivers/staging/erofs/super.c:518:20: note: (near initialization for 'erofs_fs_type.mount')
>> drivers/staging/erofs/super.c: In function 'erofs_remount':
>> drivers/staging/erofs/super.c:630:12: error: 'MS_RDONLY' undeclared (first use in this function); did you mean 'IS_RDONLY'?
>>   *flags |= MS_RDONLY;
>>             ^~~~~~~~~
>>             IS_RDONLY
>> drivers/staging/erofs/super.c: At top level:
>> drivers/staging/erofs/super.c:640:16: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
>>   .remount_fs = erofs_remount,
>>                 ^~~~~~~~~~~~~
>>
>> Caused by various commits creating erofs in the staging tree interacting
>> with various commits redoing the mount infrastructure in the vfs tree.
>>
>> I have disabed CONFIG_EROFS_FS for now:

Xiang has submitted several patches as below to fix compiling error on -next
tree, could you consider to merge those temporary fixes into -next after merging
staging-next's updates, and reenable CONFIG_EROFS_FS for further integrity
compiling and test?

staging: erofs: fix superblock/inode flags (MS_RDONLY -> SB_RDONLY, S_NOATIME)
https://lists.ozlabs.org/pipermail/linux-erofs/2018-July/000282.html

staging: erofs: remove RADIX_TREE_EXCEPTIONAL_{ENTRY, SHIFT}
https://lists.ozlabs.org/pipermail/linux-erofs/2018-July/000283.html

staging: erofs: update .mount and .remount_sb
https://lists.ozlabs.org/pipermail/linux-erofs/2018-July/000285.html

BTW, for this condition that erofs was not covered by some common vfs stuff
changes in other one's tree, who should take care of those missing fixes during
coming next merge window?

Thanks,

> 
> I will fix them as soon as possible, and test it with the latest linux-next code.
> It seems caused by some vfs changes.
> 
> Thanks,
> Gao Xiang
> 
> .
>