linux-kernel - Re: [PATCH 2/4 -v5] x86_64 EFI runtime service support: EFI runtime services

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Date:	Tue, 30 Oct 2007 15:58:31 +0000
From:	Denys Vlasenko <vda.linux@...glemail.com>
To:	"Huang, Ying" <ying.huang@...el.com>
Cc:	akpm@...ux-foundation.org, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Andi Kleen <ak@...e.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Chandramouli Narayanan <mouli@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4 -v5] x86_64 EFI runtime service support: EFI runtime services

On Tuesday 30 October 2007 05:55, Huang, Ying wrote:
> +static inline unsigned long native_get_wallclock(void)
> +{
> +	unsigned long retval;
> +
> +	if (efi_enabled)
> +		retval = efi_get_time();
> +	else
> +		retval = mach_get_cmos_time();
> +
> +	return retval;
> +}

mach_get_cmos_time() is itself an inline, and a _large_ one
(~20 LOC with macro and function calls).

efi_get_time() is an inline too, although strange one:
it is declared inline *only* in efi.c file:
      inline unsigned long efi_get_time(void)
(yes, just inline, not static/extern),
while efi.h has normal extern for it:
      extern unsigned long efi_get_time(void);

Is it supposed to be like that?

> +static inline int native_set_wallclock(unsigned long nowtime)
> +{
> +	int retval;
> +
> +	if (efi_enabled)
> +		retval = efi_set_rtc_mmss(nowtime);
> +	else
> +		retval = mach_set_rtc_mmss(nowtime);
> +
> +	return retval;
> +}

Same here, only mach_set_rtc_mmss is 50 LOC, not 20.
--
vda
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