Re: [PATCH] init: fix init_dup

[Stephen Rothwell <sfr@canb.auug.org.au>]

[-- Attachment #1: Type: text/plain, Size: 1433 bytes --]

Hi Christoph,

On Mon,  3 Aug 2020 15:58:19 +0200 Christoph Hellwig <hch@lst.de> wrote:
>
> Don't allocate an unused fd for each call.  Also drop the extra
> reference from filp_open after the init_dup calls while we're at it.
> 
> Fixes: 36e96b411649 ("init: add an init_dup helper")
> Reported-by Stephen Rothwell <sfr@canb.auug.org.au>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> 
> Al, feel free to fold this into the original patch, as that is the
> last one in the branch.
> 
>  fs/init.c   | 2 +-
>  init/main.c | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/init.c b/fs/init.c
> index 730e05acda2392..e9c320a48cf157 100644
> --- a/fs/init.c
> +++ b/fs/init.c
> @@ -260,6 +260,6 @@ int __init init_dup(struct file *file)
>  	fd = get_unused_fd_flags(0);
>  	if (fd < 0)
>  		return fd;
> -	fd_install(get_unused_fd_flags(0), get_file(file));
> +	fd_install(fd, get_file(file));
>  	return 0;
>  }
> diff --git a/init/main.c b/init/main.c
> index 089e21504b1fc1..9dae9c4f806bb9 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -1470,6 +1470,7 @@ void __init console_on_rootfs(void)
>  	init_dup(file);
>  	init_dup(file);
>  	init_dup(file);
> +	fput(file);
>  }
>  
>  static noinline void __init kernel_init_freeable(void)
> -- 
> 2.27.0
> 

Thanks, I have added that to the vfs tree merge today.

-- 
Cheers,
Stephen Rothwell

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]