linux-kernel - Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted

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Message-ID: <581451E7.1040004@huawei.com>
Date:   Sat, 29 Oct 2016 15:38:15 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <nyc@...omorphy.com>, <n-horiguchi@...jp.nec.com>,
        <mike.kravetz@...cle.com>, <rientjes@...gle.com>,
        <hillf.zj@...baba-inc.com>, <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [RFC PATCH] hugetlbfs: fix the hugetlbfs can not be mounted

On 2016/10/29 14:08, zhongjiang wrote:
> From: zhong jiang <zhongjiang@...wei.com>
>
> Since 'commit 3e89e1c5ea84 ("hugetlb: make mm and fs code explicitly non-modular")'
> bring in the mainline. mount hugetlbfs will result in the following issue.
>
> mount: unknown filesystme type 'hugetlbfs'
>
> because previous patch remove the module_alias_fs, when we mount the fs type,
> the caller get_fs_type can not find the filesystem.
>
> The patch just recover the module_alias_fs to identify the hugetlbfs.
>
> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> ---
>  fs/hugetlbfs/inode.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
> index 4fb7b10..b63e7de 100644
> --- a/fs/hugetlbfs/inode.c
> +++ b/fs/hugetlbfs/inode.c
> @@ -35,6 +35,7 @@
>  #include <linux/security.h>
>  #include <linux/magic.h>
>  #include <linux/migrate.h>
> +#include <linux/module.h>
>  #include <linux/uio.h>
>  
>  #include <asm/uaccess.h>
> @@ -1209,6 +1210,7 @@ static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
>  	.mount		= hugetlbfs_mount,
>  	.kill_sb	= kill_litter_super,
>  };
> +MODULE_ALIAS_FS("hugetlbfs");
>  
>  static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
>  
 please ignore the patch,  It have been fixed.