RE: [PATCH v4 0/2] Add FITRIM ioctl support for exFAT filesystem

["Namjae Jeon" <namjae.jeon@samsung.com>]

> This is for adding FITRIM ioctl functionality to exFAT filesystem.
> Firstly, because the fstrim is long operation, introduce bitmap_lock to narrow the lock range to
> prevent read operation stall.
> After that, add generic ioctl function and FITRIM handler.
> 
> Changelog
> =========
> v3->v4:
> - Introduce bitmap_lock mutex to narrow the lock range for bitmap access
>   and change to use bitmap_lock instead of s_lock in FITRIM handler to
>   prevent read stall while ongoing fstrim.
> - Minor code style fix
> 
> v2->v3:
> - Remove unnecessary local variable
> - Merge all changes to a single patch
> 
> v1->v2:
> - Change variable declaration order as reverse tree style.
> - Return -EOPNOTSUPP from sb_issue_discard() just as it is.
> - Remove cond_resched() in while loop.
> - Move ioctl related code into it's helper function.
> 
> Hyeongseok Kim (2):
>   exfat: introduce bitmap_lock for cluster bitmap access
>   exfat: add support ioctl and FITRIM function
Applied. Thanks for your patches!

> 
>  fs/exfat/balloc.c   | 80 +++++++++++++++++++++++++++++++++++++++++++++
>  fs/exfat/dir.c      |  5 +++
>  fs/exfat/exfat_fs.h |  5 +++
>  fs/exfat/fatent.c   | 37 ++++++++++++++++-----
>  fs/exfat/file.c     | 53 ++++++++++++++++++++++++++++++
>  fs/exfat/super.c    |  1 +
>  6 files changed, 173 insertions(+), 8 deletions(-)
> 
> --
> 2.27.0.83.g0313f36