On Wed, Apr 29, 2020 at 11:40:51PM +0200, Ard Biesheuvel wrote: > On Wed, 29 Apr 2020 at 23:39, Arvind Sankar <nived...@alum.mit.edu> wrote: > > > > On Wed, Apr 29, 2020 at 09:07:32PM +0200, Ard Biesheuvel wrote: > > > On Wed, 29 Apr 2020 at 19:41, Arvind Sankar <nived...@alum.mit.edu> wrote: > > > > > > > > Add support for the x86 CMDLINE_BOOL and CMDLINE_OVERRIDE configuration > > > > options. > > > > > > > > Signed-off-by: Arvind Sankar <nived...@alum.mit.edu> > > > > --- > > > > drivers/firmware/efi/libstub/x86-stub.c | 12 ++++++++---- > > > > 1 file changed, 8 insertions(+), 4 deletions(-) > > > > > > > > diff --git a/drivers/firmware/efi/libstub/x86-stub.c > > > > b/drivers/firmware/efi/libstub/x86-stub.c > > > > index 85a924fecc87..0faba30d6406 100644 > > > > --- a/drivers/firmware/efi/libstub/x86-stub.c > > > > +++ b/drivers/firmware/efi/libstub/x86-stub.c > > > > @@ -680,7 +680,6 @@ unsigned long efi_main(efi_handle_t handle, > > > > unsigned long buffer_start, buffer_end; > > > > struct setup_header *hdr = &boot_params->hdr; > > > > efi_status_t status; > > > > - unsigned long cmdline_paddr; > > > > > > > > efi_system_table = sys_table_arg; > > > > > > > > @@ -739,9 +738,14 @@ unsigned long efi_main(efi_handle_t handle, > > > > image_offset = 0; > > > > } > > > > > > > > - cmdline_paddr = ((u64)hdr->cmd_line_ptr | > > > > - ((u64)boot_params->ext_cmd_line_ptr << 32)); > > > > - efi_parse_options((char *)cmdline_paddr); > > > > +#ifdef CONFIG_CMDLINE_BOOL > > > > + efi_parse_options(CONFIG_CMDLINE); > > > > +#endif > > > > > > Can we use IS_ENABLED() here as well? > > > > Unfortunately on x86, CONFIG_CMDLINE is not defined if > > CONFIG_CMDLINE_BOOL isn't enabled. So turning this into an > > IS_ENABLED(CONFIG_CMDLINE_BOOL) causes a compile error when it's > > disabled due to CONFIG_CMDLINE being an undeclared symbol. > > > > What about > > efi_parse_options(CONFIG_CMDLINE ""); > > ?
That's still a syntax error if CONFIG_CMDLINE is undefined, no? It's not defined to be empty -- it's undefined. IS_ENABLED doesn't work on string-valued options so I can't use IS_ENABLED(CONFIG_CMDLINE) either.
