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PM: Drop pm_flags that is not necessary

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The variable pm_flags is used to prevent APM from being enabled
along with ACPI, which would lead to problems.  However, acpi_init()
is always called before apm_init() and after acpi_init() has
returned, it is known whether or not ACPI will be used.  Namely, if
acpi_disabled is not set after acpi_init() has returned, this means
that ACPI is enabled.  Thus, it is sufficient to check acpi_disabled
in apm_init() to prevent APM from being enabled in parallel with
ACPI.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2011-02-15 21:22:24 +01:00
parent e866500247
commit 6831c6edc7
5 changed files with 7 additions and 48 deletions
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13
kernel/power/main.c
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@ -19,19 +19,6 @@ DEFINE_MUTEX(pm_mutex);
#ifdef CONFIG_PM_SLEEP
unsigned int pm_flags;
EXPORT_SYMBOL(pm_flags);
bool pm_apm_enabled(void)
{
return !!(pm_flags & PM_APM);
}
void pm_set_acpi_flag(void)
{
pm_flags |= PM_ACPI;
}
/* Routines for PM-transition notifications */
static BLOCKING_NOTIFIER_HEAD(pm_chain_head);