CentOS - Feb 2018 - Adjust type of rw in submit_bio from int to unsigned long

Hi, I am a developer who worked on CentOS. Recently I am working on porting one
of my
block drivers from CentOS 6.x to CentOS 7.x. In newest kernel
(kernel-3.10.0-693.17.1.el7)
I found there is an issue in submit_bio()'s first argument:
    void submit_bio(int rw, struct bio *bio)
The type of bi_rw of struct bio is unsigned long, and the number of enum
rq_flags_bits
also exceeds 32, so we should better using unsigned long for rw in submit_bio(),
like:
    void submit_bio(unsigned long rw, struct bio *bio)

Forward mail to centos-devel mailing list for getting more attentions!

Sorry for disturbing.
> -----Original Messages-----
> From: wuzhouhui <wuzhouhui14 at mails.ucas.ac.cn>
> Sent Time: 2018-02-07 13:44:07 (Wednesday)
> To: centos at centos.org
> Cc: wuzhouhui14 <wuzhouhui14 at mails.ucas.ac.cn>
> Subject: Adjust type of rw in submit_bio from int to unsigned long
> 
> Hi, I am a developer who worked on CentOS. Recently I am working on porting
one of my
> block drivers from CentOS 6.x to CentOS 7.x. In newest kernel
(kernel-3.10.0-693.17.1.el7)
> I found there is an issue in submit_bio()'s first argument:
>     void submit_bio(int rw, struct bio *bio)
> The type of bi_rw of struct bio is unsigned long, and the number of enum
rq_flags_bits
> also exceeds 32, so we should better using unsigned long for rw in
submit_bio(), like:
>     void submit_bio(unsigned long rw, struct bio *bio)
> 
>