[CRIU] [PATCH v2 02/24] exec: Simplify unshare_files

[Oleg Nesterov]

I'll try to actually read this series tomorrow but I see nothing wrong
after the quick glance.

Just one off-topic question,

On 11/20, Eric W. Biederman wrote:
>
> --- a/fs/coredump.c
> +++ b/fs/coredump.c
> @@ -585,7 +585,6 @@ void do_coredump(const kernel_siginfo_t *siginfo)
>  	int ispipe;
>  	size_t *argv = NULL;
>  	int argc = 0;
> -	struct files_struct *displaced;
>  	/* require nonrelative corefile path and be extra careful */
>  	bool need_suid_safe = false;
>  	bool core_dumped = false;
> @@ -791,11 +790,9 @@ void do_coredump(const kernel_siginfo_t *siginfo)
>  	}
>
>  	/* get us an unshared descriptor table; almost always a no-op */
> -	retval = unshare_files(&displaced);
> +	retval = unshare_files();

Can anyone explain why does do_coredump() need unshare_files() at all?

Oleg.