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SubjectRE: [PATCH v4 2/2] exfat: add support ioctl and FITRIM function
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> Add FITRIM ioctl to enable discarding unused blocks while mounted.
> As current exFAT doesn't have generic ioctl handler, add empty ioctl
> function first, and add FITRIM handler.
>
> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
> Signed-off-by: Hyeongseok Kim <hyeongseok@gmail.com>
> ---
> fs/exfat/balloc.c | 80 +++++++++++++++++++++++++++++++++++++++++++++
> fs/exfat/dir.c | 5 +++
> fs/exfat/exfat_fs.h | 4 +++
> fs/exfat/file.c | 53 ++++++++++++++++++++++++++++++
> 4 files changed, 142 insertions(+)
>

It looks better than v3.
Thanks for your work!

Acked-by: Sungjong Seo <sj1557.seo@samsung.com>

BTW, there is still a problem that the alloc/free cluster operation waits
until the trimfs operation is finished.
Any ideas for improvement in the future are welcome. :)

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