X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fkernel%2Fpmtimer.c;h=7554458dc9cbb6f35c2d8caf9f0333f5c7e41410;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=5c51d10408a677695c9f2d2d8cd0e5d69571c760;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/arch/x86_64/kernel/pmtimer.c b/arch/x86_64/kernel/pmtimer.c
index 5c51d1040..7554458dc 100644
--- a/arch/x86_64/kernel/pmtimer.c
+++ b/arch/x86_64/kernel/pmtimer.c
@@ -27,7 +27,7 @@
 /* The I/O port the PMTMR resides at.
  * The location is detected during setup_arch(),
  * in arch/i386/kernel/acpi/boot.c */
-u32 pmtmr_ioport;
+u32 pmtmr_ioport __read_mostly;
 
 /* value of the Power timer at last timer interrupt */
 static u32 offset_delay;
@@ -68,7 +68,7 @@ int pmtimer_mark_offset(void)
 	offset_delay = delta % (USEC_PER_SEC / HZ);
 
 	rdtscll(tsc);
-	vxtime.last_tsc = tsc - offset_delay * cpu_khz;
+	vxtime.last_tsc = tsc - offset_delay * (u64)cpu_khz / 1000;
 
 	/* don't calculate delay for first run,
 	   or if we've got less then a tick */
@@ -86,7 +86,7 @@ static unsigned pmtimer_wait_tick(void)
 	for (a = b = inl(pmtmr_ioport) & ACPI_PM_MASK;
 	     a == b;
 	     b = inl(pmtmr_ioport) & ACPI_PM_MASK)
-		;
+		cpu_relax();
 	return b;
 }
 
@@ -97,6 +97,7 @@ void pmtimer_wait(unsigned us)
 	a = pmtimer_wait_tick();
 	do {
 		b = inl(pmtmr_ioport);
+		cpu_relax();
 	} while (cyc2us(b - a) < us);
 }
 
@@ -120,7 +121,7 @@ unsigned int do_gettimeoffset_pm(void)
 static int __init nopmtimer_setup(char *s)
 {
 	pmtmr_ioport = 0;
-	return 0;
+	return 1;
 }
 
 __setup("nopmtimer", nopmtimer_setup);