[WIP] [NOMERGE] [RFC PATCH v0.3 3/6] erofs: introduce erofs_map_blocks_iter

[Gao Xiang]

Hi Chao,

On 2018/7/2 9:47, Chao Yu wrote:
>> I left some words on the last patch of this patchset,
>> [WIP] [NOMERGE] [RFC PATCH v0.3 6/6] erofs: introduce VLE decompression 
>> subsystem:
>>
>> "The patchset is temporarily based on
>> [RFC PATCH RESEND 11/12] erofs: introduce a customized LZ4 decompression
>> The new unzip system is still _buggy_, not for _daily_ use!"
>>
>> which seems improper, sorry... I will take care and leave message at the 
>> beginning from now on.
> No problem, I think we can add revert patch for [PATCH 12/12] erofs: introduce a
> customized LZ4 decompression, so that we can track erofs code change history
> more clearly, and once you want to look into it or make code going back to the
> old implementation, we can remove that revert patch later.
> 
> The history will be only existed in current erofs dev branch, once the code is
> pushed or merged by Linux or Android OS, it will invisible.
> 
> Or you're sure about remove old implementation, let's do it...
> 
> Thanks> 

I am also thinking about this yesterday, how about rebasing the following patches:

erofs: support tracepoint
erofs: introduce error injection infrastructure
erofs: introduce parse_options()
erofs: support special inode
erofs: remove unused EROFS_XATTR_INDEX_ADVISE
erofs: fix to return correct value of alloc_inode
erofs: fix to do endian conversion correctly
erofs: fix missing endian conversion
erofs: fix to avoid potential overflow
erofs: fix compile error
erofs: add the missing header <linux/prefetch.h>
erofs: update SPDX-License-Identifier   <- Could we drop this patch temporarily?
                                           Some files could be re-licensed in the future for mkfs,
                                           especially the file "erofs_fs.h"
erofs: fix ifnullfree.cocci warnings

on "[RFC PATCH RESEND 11/12] erofs: introduce a customized LZ4 decompression temporarily"
then apply [PATCH 12/12] and make the following patch on the top of [PATCH 12/12]
erofs: fix to handle return value of erofs_init_page_bundle() correctly <-

"git am -k -3" could be a powerful way to get this done..

In addition to that, we could have 2 choises to apply the new unzip subsystem:
1) We could revert [PATCH 12/12] and "erofs: fix to handle return value of erofs_init_page_bundle() correctly"
and then apply the new patchset just as you said,
or
2) Introduce a new 'dev-test' branch as Jaegeuk Kim's branch.

Boths for me are ok. :)

Thanks,
Gao Xiang