[PATCH] kexec/ppc64: leverage kexec_file_load support

[Simon Horman]

On Mon, Mar 19, 2018 at 03:57:11PM -0300, Thiago Jung Bauermann wrote:
> 
> Hello Hari,
> 
> Hari Bathini <hbathini at linux.vnet.ibm.com> writes:
> 
> > PPC64 kernel now supports kexec_file_load system call. Leverage it by
> > enabling that support here. Note that loading crash kernel with this
> > system call is not yet supported in the kernel and trying to load one
> > will fail with '-ENOTSUPP' error.
> >
> > Signed-off-by: Hari Bathini <hbathini at linux.vnet.ibm.com>
> > ---
> >  kexec/arch/ppc64/kexec-elf-ppc64.c |   84 ++++++++++++++++++++++++++++++++++++
> >  kexec/kexec-syscall.h              |    3 +
> >  2 files changed, 87 insertions(+)
> 
> Thanks for implementing this! Looks good to me, just one nit below.
> Regardless of that:
> 
> Reviewed-by: Thiago Jung Bauermann <bauerman at linux.vnet.ibm.com>
> 
> > diff --git a/kexec/arch/ppc64/kexec-elf-ppc64.c b/kexec/arch/ppc64/kexec-elf-ppc64.c
> > index ddd3de8..2742cd6 100644
> > --- a/kexec/arch/ppc64/kexec-elf-ppc64.c
> > +++ b/kexec/arch/ppc64/kexec-elf-ppc64.c
> 
> <snip>
> 
> > @@ -117,6 +196,9 @@ int elf_ppc64_load(int argc, char **argv, const char *buf, off_t len,
> >  	uint32_t my_run_at_load;
> >  	unsigned int slave_code[256/sizeof (unsigned int)], master_entry;
> >
> > +	if (info->file_mode)
> > +		return elf_ppc64_load_file(argc, argv, info);
> > +
> >  	/* See options.h -- add any more there, too. */
> >  	static const struct option options[] = {
> >  		KEXEC_ARCH_OPTIONS
> 
> This is placing executable code between variable declarations. It may be
> fine for gcc but it's more idiomatic C to put it after all variable
> declarations. But perhaps the kexec-tools style is fine with it?

I'd rather we avoid proliferating this style in the kexec code.
Hari, could you respin this patch?