Re: [patch 2.6.26-rc4-git] PM: boot time suspend selftest

From: Andrew Morton
Date: Wed Jul 23 2008 - 04:21:09 EST

On Thu, 29 May 2008 13:33:41 -0700 David Brownell <david-b@xxxxxxxxxxx> wrote:

> Boot-time test for system suspend states (STR or standby). The generic
> RTC framework triggers wakeup alarms, which are used to exit those states.
> - Measures some aspects of suspend time ... this uses "jiffies" until
> someone converts it to use a timebase that works properly even while
> timer IRQs are disabled.
> - Triggered by a command line parameter. By default nothing even
> vaguely troublesome will happen, but "test_suspend=mem" will give
> you a brief STR test during system boot. (Or you may need to use
> "test_suspend=standby" instead, if your hardware needs that.)
> This isn't without problems. It fires early enough during boot that for
> example both PCMCIA and MMC stacks have misbehaved. The workaround in
> those cases was to boot without such media cards inserted.

mips allmodconfig:

kernel/built-in.o(.init.text+0x5b30): In function `test_suspend':
: undefined reference to `rtc_class'
kernel/built-in.o(.init.text+0x5b38): In function `test_suspend':
: undefined reference to `rtc_class'
kernel/built-in.o(.init.text+0x5ba4): In function `test_suspend':
: undefined reference to `rtc_class_open'
kernel/built-in.o(.init.text+0x5c30): In function `test_suspend':
: undefined reference to `rtc_read_time'
kernel/built-in.o(.init.text+0x5d50): In function `test_suspend':
: undefined reference to `rtc_set_alarm'
kernel/built-in.o(.init.text+0x5f6c): In function `test_suspend':
: undefined reference to `rtc_class_close'

some of these are already exported, so something else went wrong.
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