linux-kernel - Re: [PATCH 4/8] staging: erofs: cleanup z_erofs_vle_work

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Date:   Mon, 13 Aug 2018 15:00:57 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Chao Yu <chao@...nel.org>
Cc:     gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        Gao Xiang <gaoxiang25@...wei.com>,
        Chao Yu <yuchao0@...wei.com>, linux-erofs@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/8] staging: erofs: cleanup z_erofs_vle_work_{lookup,
 register}

On Sun, Aug 12, 2018 at 10:01:46PM +0800, Chao Yu wrote:
> From: Gao Xiang <gaoxiang25@...wei.com>
> 
> This patch introduces 'struct z_erofs_vle_work_finder' to clean up
> arguments of z_erofs_vle_work_lookup and z_erofs_vle_work_register.
> 
> Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>
> Reviewed-by: Chao Yu <yuchao0@...wei.com>
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> ---
>  drivers/staging/erofs/unzip_vle.c | 89 ++++++++++++++++---------------
>  1 file changed, 47 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/staging/erofs/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c
> index b2e05e2b4116..5032b3b05de1 100644
> --- a/drivers/staging/erofs/unzip_vle.c
> +++ b/drivers/staging/erofs/unzip_vle.c
> @@ -271,36 +271,42 @@ static inline bool try_to_claim_workgroup(
>  	return true;	/* lucky, I am the followee :) */
>  }
>  
> +struct z_erofs_vle_work_finder {
> +	struct super_block *sb;
> +	pgoff_t idx;
> +	unsigned pageofs;
> +
> +	struct z_erofs_vle_workgroup **grp_ret;
> +	enum z_erofs_vle_work_role *role;
> +	z_erofs_vle_owned_workgrp_t *owned_head;
> +	bool *hosted;
> +};
> +
>  static struct z_erofs_vle_work *
> -z_erofs_vle_work_lookup(struct super_block *sb,
> -			pgoff_t idx, unsigned pageofs,
> -			struct z_erofs_vle_workgroup **grp_ret,
> -			enum z_erofs_vle_work_role *role,
> -			z_erofs_vle_owned_workgrp_t *owned_head,
> -			bool *hosted)
> +z_erofs_vle_work_lookup(const struct z_erofs_vle_work_finder *f)
>  {
>  	bool tag, primary;
>  	struct erofs_workgroup *egrp;
>  	struct z_erofs_vle_workgroup *grp;
>  	struct z_erofs_vle_work *work;
>  
> -	egrp = erofs_find_workgroup(sb, idx, &tag);
> +	egrp = erofs_find_workgroup(f->sb, f->idx, &tag);
>  	if (egrp == NULL) {
> -		*grp_ret = NULL;
> +		*f->grp_ret = NULL;

All these pointers to pointer seem a bit messy.  Just do this:

	struct z_erofs_vle_workgroup *grp;

Then replace "grp" in z_erofs_vle_work_iter_begin() with finder.grp;

regards,
dan carpenter