RE: [PATCH] only call the c function set_bios_mode if the value CONFIG_X86_64 is set.

[David Laight <David.Laight@ACULAB.COM>]

From: Hans Weber
> Sent: 19 February 2022 20:40
> 
> Signed-off-by: Hans Weber <hwe.kernel@gmail.com>
> ---
>  arch/x86/boot/main.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
> index e3add857c2c9..e4df8ff1e228 100644
> --- a/arch/x86/boot/main.c
> +++ b/arch/x86/boot/main.c
> @@ -102,14 +102,12 @@ static void query_ist(void)
>   */
>  static void set_bios_mode(void)
>  {
> -#ifdef CONFIG_X86_64
>  	struct biosregs ireg;
> 
>  	initregs(&ireg);
>  	ireg.ax = 0xec00;
>  	ireg.bx = 2;
>  	intcall(0x15, &ireg, NULL);
> -#endif
>  }
> 
>  static void init_heap(void)
> @@ -152,7 +150,9 @@ void main(void)
>  	}
> 
>  	/* Tell the BIOS what CPU mode we intend to run in. */
> +#ifdef CONFIG_X86_64
>  	set_bios_mode();
> +#endif

That should make absolutely no difference.
The empty static function will be inlined and thus discarded.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)