linux-kernel - Re: [PATCH] fsnotify: Use NULL instead of 0 for pointer

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Date:   Wed, 30 Oct 2019 13:21:49 +0100
From:   Jan Kara <jack@...e.cz>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Jan Kara <jack@...e.cz>, Amir Goldstein <amir73il@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fsnotify: Use NULL instead of 0 for pointer

On Tue 29-10-19 21:39:02, Tiezhu Yang wrote:
> Fix the following sparse warning:
> 
> fs/notify/fdinfo.c:53:87: warning: Using plain integer as NULL pointer
> 
> Fixes: be77196b809c ("fs, notify: add procfs fdinfo helper")
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>

Thanks for the patch but similar patch already sits in my tree as commit
ddd06c36bdb "fsnotify/fdinfo: exportfs_encode_inode_fh() takes pointer as
4th argument". I'll send it to Linus in the next merge window.

								Honza

> ---
>  fs/notify/fdinfo.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c
> index 1e2bfd2..cd2846e 100644
> --- a/fs/notify/fdinfo.c
> +++ b/fs/notify/fdinfo.c
> @@ -50,7 +50,8 @@ static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
>  	f.handle.handle_bytes = sizeof(f.pad);
>  	size = f.handle.handle_bytes >> 2;
>  
> -	ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0);
> +	ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle,
> +				       &size, NULL);
>  	if ((ret == FILEID_INVALID) || (ret < 0)) {
>  		WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
>  		return;
> -- 
> 2.1.0
> 
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR