linux-ext4 - Re: [PATCH] jbd/jbd2: add pointer type conversion on void *arg from void * to journal

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Message-ID: <4E38AC92.4090501@cn.fujitsu.com>
Date:	Wed, 03 Aug 2011 10:04:02 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Wang Sheng-Hui <shhuiw@...il.com>
CC:	"Theodore Ts'o" <tytso@....edu>, Jan Kara <jack@...e.cz>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] jbd/jbd2: add pointer type conversion on void *arg from
 void * to journal_t * explicitly in kjournald/kjournald2

09:58, Wang Sheng-Hui wrote:
> The patch is against 3.0
> 
> The arg of kjournald/kjournald2 is void *, and points to type
> journal_t. We should convert it to journal_t * explicitly in
> the kjournald/kjournald2 function body.
> 

Why?

Implicit convertion from void * to foo * is ok. Did the compiler
complain about this to you?

> Signed-off-by: Wang Sheng-Hui <shhuiw@...il.com>
> ---
>  fs/jbd/journal.c  |    2 +-
>  fs/jbd2/journal.c |    2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
> index e2d4285..32956fd 100644
> --- a/fs/jbd/journal.c
> +++ b/fs/jbd/journal.c
> @@ -116,7 +116,7 @@ static void commit_timeout(unsigned long __data)
>  
>  static int kjournald(void *arg)
>  {
> -	journal_t *journal = arg;
> +	journal_t *journal = (journal_t *)arg;
>  	transaction_t *transaction;
>  
>  	/*
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index 0dfa5b5..c4f4bfc 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -129,7 +129,7 @@ static void commit_timeout(unsigned long __data)
>  
>  static int kjournald2(void *arg)
>  {
> -	journal_t *journal = arg;
> +	journal_t *journal = (journal_t *)arg;
>  	transaction_t *transaction;
>  
>  	/*
--
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