Merge git://oak/home/sfr/kernels/iseries/work

[pandora-kernel.git] / arch / i386 / kernel / apm.c

diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 86e80c5..1e60acb 100644 (file)
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -218,6 +218,7 @@
 #include <linux/time.h>
 #include <linux/sched.h>
 #include <linux/pm.h>
+#include <linux/pm_legacy.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/smp.h>
@@ -769,8 +770,26 @@ static int set_system_power_state(u_short state)
 static int apm_do_idle(void)
 {
        u32     eax;
+       u8      ret = 0;
+       int     idled = 0;
+       int     polling;
+
+       polling = test_thread_flag(TIF_POLLING_NRFLAG);
+       if (polling) {
+               clear_thread_flag(TIF_POLLING_NRFLAG);
+               smp_mb__after_clear_bit();
+       }
+       if (!need_resched()) {
+               idled = 1;
+               ret = apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax);
+       }
+       if (polling)
+               set_thread_flag(TIF_POLLING_NRFLAG);
+
+       if (!idled)
+               return 0;
 
-       if (apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax)) {
+       if (ret) {
                static unsigned long t;
 
                /* This always fails on some SMP boards running UP kernels.