[PATCH 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD

[Simon Horman]

On Mon, Feb 26, 2018 at 01:00:34PM +0100, Michal Suchanek wrote:
> When the kernel does not know a syscall number it returns -ENOSYS but
> when kexec does not know a syscall number it returns -1. Return -ENOSYS
> from kexec as well.
> 
> Signed-off-by: Michal Suchanek <msuchanek at suse.de>
> ---
>  kexec/kexec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kexec/kexec.c b/kexec/kexec.c
> index cfd837c1b6bb..ab8cff7fe083 100644
> --- a/kexec/kexec.c
> +++ b/kexec/kexec.c
> @@ -1166,7 +1166,7 @@ static int do_kexec_file_load(int fileind, int argc, char **argv,
>  
>  	if (!is_kexec_file_load_implemented()) {
>  		fprintf(stderr, "syscall kexec_file_load not available.\n");
> -		return -1;
> +		return -ENOSYS;

It seems to me that the current with do_kexec_file_load() returning
0 for success and -1 for error. I think any change to that scheme would
need to be more comprehensive than this.

>  	}
>  
>  	if (argc - fileind <= 0) {
> -- 
> 2.13.6
>