linux-kernel - Re: [PATCH v7 1/3] fs: fat: Add fat filesystem partition volume label in local structure

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Date:   Sun, 14 Jan 2018 22:18:48 +0900
From:   OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:     ChenGuanqiao <chen.chenchacha@...mail.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/3] fs: fat: Add fat filesystem partition volume label in local structure

ChenGuanqiao <chen.chenchacha@...mail.com> writes:

> Signed-off-by: ChenGuanqiao <chen.chenchacha@...mail.com>
> ---
>  fs/fat/fat.h                  |  6 ++++++
>  fs/fat/inode.c                | 15 ++++++++++++---
>  include/uapi/linux/msdos_fs.h |  2 ++
>  3 files changed, 20 insertions(+), 3 deletions(-)
>
> diff --git a/fs/fat/fat.h b/fs/fat/fat.h
> index 8fc1093da47d..96f631282c71 100644
> --- a/fs/fat/fat.h
> +++ b/fs/fat/fat.h
> @@ -86,6 +86,7 @@ struct msdos_sb_info {
> 	int dir_per_block;	      /* dir entries per block */
> 	int dir_per_block_bits;	      /* log2(dir_per_block) */
> 	unsigned int vol_id;		/*volume ID*/
> +	char vol_label[11];		/*volume label*/

In latter patches doesn't use this cache. Why do we cache, or why read
ioctl doesn't use this cache?
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>