diff options
| author | Len Brown <len.brown@intel.com> | 2007-12-13 17:38:03 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-01-11 12:26:47 -0500 |
| commit | 9f9adecd2d0e4f88fa0e8cb06c6ec207748df70a (patch) | |
| tree | b3914860b74a9f6c3ae42016aa708b54040248f8 /kernel/power | |
| parent | da8cadb31b82c9d41fc593c8deab6aa20b162d6b (diff) | |
| download | linux-9f9adecd2d0e4f88fa0e8cb06c6ec207748df70a.tar.bz2 | |
PM: ACPI and APM must not be enabled at the same time
ACPI and APM used "pm_active" to guarantee that
they would not be simultaneously active.
But pm_active was recently moved under CONFIG_PM_LEGACY,
so that without CONFIG_PM_LEGACY, pm_active became a NOP --
allowing ACPI and APM to both be simultaneously enabled.
This caused unpredictable results, including boot hangs.
Further, the code under CONFIG_PM_LEGACY is scheduled
for removal.
So replace pm_active with pm_flags.
pm_flags depends only on CONFIG_PM,
which is present for both CONFIG_APM and CONFIG_ACPI.
http://bugzilla.kernel.org/show_bug.cgi?id=9194
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/main.c | 3 | ||||
| -rw-r--r-- | kernel/power/pm.c | 4 |
2 files changed, 3 insertions, 4 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 3cdf95b1dc92..f71c9504a5c5 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -28,6 +28,9 @@ BLOCKING_NOTIFIER_HEAD(pm_chain_head); DEFINE_MUTEX(pm_mutex); +unsigned int pm_flags; +EXPORT_SYMBOL(pm_flags); + #ifdef CONFIG_SUSPEND /* This is just an arbitrary number */ diff --git a/kernel/power/pm.c b/kernel/power/pm.c index c50d15266c10..60c73fa670d5 100644 --- a/kernel/power/pm.c +++ b/kernel/power/pm.c @@ -27,8 +27,6 @@ #include <linux/interrupt.h> #include <linux/mutex.h> -int pm_active; - /* * Locking notes: * pm_devs_lock can be a semaphore providing pm ops are not called @@ -204,6 +202,4 @@ int pm_send_all(pm_request_t rqst, void *data) EXPORT_SYMBOL(pm_register); EXPORT_SYMBOL(pm_send_all); -EXPORT_SYMBOL(pm_active); - |