The patch titled
time: x86_64: hpet_address cleanup
has been added to the -mm tree. Its filename is
time-x86_64-hpet_address-cleanup.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: time: x86_64: hpet_address cleanup
From: john stultz <johnstul@xxxxxxxxxx>
In preparation for supporting generic timekeeping, this patch cleans up
x86-64's use of vxtime.hpet_address, changing it to just hpet_address as is
also used in i386. This is necessary since the vxtime structure will be going
away.
Signed-off-by: John Stultz <johnstul@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/i386/kernel/acpi/boot.c | 23 +++++----------------
arch/x86_64/kernel/apic.c | 3 +-
arch/x86_64/kernel/time.c | 36 +++++++++++++++++----------------
include/asm-x86_64/hpet.h | 1
4 files changed, 28 insertions(+), 35 deletions(-)
diff -puN arch/i386/kernel/acpi/boot.c~time-x86_64-hpet_address-cleanup arch/i386/kernel/acpi/boot.c
--- a/arch/i386/kernel/acpi/boot.c~time-x86_64-hpet_address-cleanup
+++ a/arch/i386/kernel/acpi/boot.c
@@ -639,6 +639,7 @@ static int __init acpi_parse_sbf(unsigne
}
#ifdef CONFIG_HPET_TIMER
+#include <asm/hpet.h>
static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
{
@@ -672,32 +673,20 @@ static int __init acpi_parse_hpet(unsign
hpet_res->end = (1 * 1024) - 1;
}
+ hpet_address = hpet_tbl->addr.addrl;
#ifdef CONFIG_X86_64
- vxtime.hpet_address = hpet_tbl->addr.addrl |
- ((long)hpet_tbl->addr.addrh << 32);
-
+ hpet_address |= ((long)hpet_tbl->addr.addrh << 32);
+#endif
printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
- hpet_tbl->id, vxtime.hpet_address);
-
- res_start = vxtime.hpet_address;
-#else /* X86 */
- {
- extern unsigned long hpet_address;
+ hpet_tbl->id, hpet_address);
- hpet_address = hpet_tbl->addr.addrl;
- printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
- hpet_tbl->id, hpet_address);
-
- res_start = hpet_address;
- }
-#endif /* X86 */
+ res_start = hpet_address;
if (hpet_res) {
hpet_res->start = res_start;
hpet_res->end += res_start;
insert_resource(&iomem_resource, hpet_res);
}
-
return 0;
}
#else
diff -puN arch/x86_64/kernel/apic.c~time-x86_64-hpet_address-cleanup arch/x86_64/kernel/apic.c
--- a/arch/x86_64/kernel/apic.c~time-x86_64-hpet_address-cleanup
+++ a/arch/x86_64/kernel/apic.c
@@ -37,6 +37,7 @@
#include <asm/idle.h>
#include <asm/proto.h>
#include <asm/timex.h>
+#include <asm/hpet.h>
#include <asm/apic.h>
int apic_mapped;
@@ -762,7 +763,7 @@ static void setup_APIC_timer(unsigned in
local_irq_save(flags);
/* wait for irq slice */
- if (vxtime.hpet_address && hpet_use_timer) {
+ if (hpet_address && hpet_use_timer) {
int trigger = hpet_readl(HPET_T0_CMP);
while (hpet_readl(HPET_COUNTER) >= trigger)
/* do nothing */ ;
diff -puN arch/x86_64/kernel/time.c~time-x86_64-hpet_address-cleanup arch/x86_64/kernel/time.c
--- a/arch/x86_64/kernel/time.c~time-x86_64-hpet_address-cleanup
+++ a/arch/x86_64/kernel/time.c
@@ -67,6 +67,7 @@ static int notsc __initdata = 0;
unsigned int cpu_khz; /* TSC clocks / usec, not used here */
EXPORT_SYMBOL(cpu_khz);
+unsigned long hpet_address;
static unsigned long hpet_period; /* fsecs / HPET clock */
unsigned long hpet_tick; /* HPET clocks / interrupt */
int hpet_use_timer; /* Use counter of hpet for time keeping, otherwise PIT */
@@ -316,7 +317,7 @@ static noinline void handle_lost_ticks(i
KERN_WARNING "Your time source seems to be instable or "
"some driver is hogging interupts\n");
print_symbol("rip %s\n", get_irq_regs()->rip);
- if (vxtime.mode == VXTIME_TSC && vxtime.hpet_address) {
+ if (vxtime.mode == VXTIME_TSC && hpet_address) {
printk(KERN_WARNING "Falling back to HPET\n");
if (hpet_use_timer)
vxtime.last = hpet_readl(HPET_T0_CMP) -
@@ -324,6 +325,7 @@ static noinline void handle_lost_ticks(i
else
vxtime.last = hpet_readl(HPET_COUNTER);
vxtime.mode = VXTIME_HPET;
+ vxtime.hpet_address = hpet_address;
do_gettimeoffset = do_gettimeoffset_hpet;
}
/* else should fall back to PIT, but code missing. */
@@ -354,7 +356,7 @@ void main_timer_handler(void)
write_seqlock(&xtime_lock);
- if (vxtime.hpet_address)
+ if (hpet_address)
offset = hpet_readl(HPET_COUNTER);
if (hpet_use_timer) {
@@ -717,7 +719,7 @@ static __init int late_hpet_init(void)
struct hpet_data hd;
unsigned int ntimer;
- if (!vxtime.hpet_address)
+ if (!hpet_address)
return 0;
memset(&hd, 0, sizeof (hd));
@@ -730,7 +732,7 @@ static __init int late_hpet_init(void)
* Register with driver.
* Timer0 and Timer1 is used by platform.
*/
- hd.hd_phys_address = vxtime.hpet_address;
+ hd.hd_phys_address = hpet_address;
hd.hd_address = (void __iomem *)fix_to_virt(FIX_HPET_BASE);
hd.hd_nirqs = ntimer;
hd.hd_flags = HPET_DATA_PLATFORM;
@@ -799,10 +801,10 @@ static int hpet_init(void)
{
unsigned int id;
- if (!vxtime.hpet_address)
+ if (!hpet_address)
return -1;
- set_fixmap_nocache(FIX_HPET_BASE, vxtime.hpet_address);
- __set_fixmap(VSYSCALL_HPET, vxtime.hpet_address, PAGE_KERNEL_VSYSCALL_NOCACHE);
+ set_fixmap_nocache(FIX_HPET_BASE, hpet_address);
+ __set_fixmap(VSYSCALL_HPET, hpet_address, PAGE_KERNEL_VSYSCALL_NOCACHE);
/*
* Read the period, compute tick and quotient.
@@ -856,7 +858,7 @@ void __init pit_stop_interrupt(void)
void __init stop_timer_interrupt(void)
{
char *name;
- if (vxtime.hpet_address) {
+ if (hpet_address) {
name = "HPET";
hpet_timer_stop_set_go(0);
} else {
@@ -879,8 +881,7 @@ static struct irqaction irq0 = {
void __init time_init(void)
{
if (nohpet)
- vxtime.hpet_address = 0;
-
+ hpet_address = 0;
xtime.tv_sec = get_cmos_time();
xtime.tv_nsec = 0;
@@ -890,7 +891,7 @@ void __init time_init(void)
if (!hpet_init())
vxtime_hz = (FSEC_PER_SEC + hpet_period / 2) / hpet_period;
else
- vxtime.hpet_address = 0;
+ hpet_address = 0;
if (hpet_use_timer) {
/* set tick_nsec to use the proper rate for HPET */
@@ -898,7 +899,7 @@ void __init time_init(void)
cpu_khz = hpet_calibrate_tsc();
timename = "HPET";
#ifdef CONFIG_X86_PM_TIMER
- } else if (pmtmr_ioport && !vxtime.hpet_address) {
+ } else if (pmtmr_ioport && !hpet_address) {
vxtime_hz = PM_TIMER_FREQUENCY;
timename = "PM";
pit_init();
@@ -965,23 +966,24 @@ void time_init_gtod(void)
if (unsynchronized_tsc())
notsc = 1;
- if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
+ if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
vgetcpu_mode = VGETCPU_RDTSCP;
else
vgetcpu_mode = VGETCPU_LSL;
- if (vxtime.hpet_address && notsc) {
+ if (hpet_address && notsc) {
timetype = hpet_use_timer ? "HPET" : "PIT/HPET";
if (hpet_use_timer)
vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
else
vxtime.last = hpet_readl(HPET_COUNTER);
vxtime.mode = VXTIME_HPET;
+ vxtime.hpet_address = hpet_address;
do_gettimeoffset = do_gettimeoffset_hpet;
#ifdef CONFIG_X86_PM_TIMER
/* Using PM for gettimeofday is quite slow, but we have no other
choice because the TSC is too unreliable on some systems. */
- } else if (pmtmr_ioport && !vxtime.hpet_address && notsc) {
+ } else if (pmtmr_ioport && !hpet_address && notsc) {
timetype = "PM";
do_gettimeoffset = do_gettimeoffset_pm;
vxtime.mode = VXTIME_PMTMR;
@@ -1041,7 +1043,7 @@ static int timer_resume(struct sys_devic
sleep_length = 0;
ctime = sleep_start;
}
- if (vxtime.hpet_address)
+ if (hpet_address)
hpet_reenable();
else
i8254_timer_resume();
@@ -1125,7 +1127,7 @@ static unsigned int hpet_t1_cmp; /* cach
int is_hpet_enabled(void)
{
- return vxtime.hpet_address != 0;
+ return hpet_address != 0;
}
/*
diff -puN include/asm-x86_64/hpet.h~time-x86_64-hpet_address-cleanup include/asm-x86_64/hpet.h
--- a/include/asm-x86_64/hpet.h~time-x86_64-hpet_address-cleanup
+++ a/include/asm-x86_64/hpet.h
@@ -58,6 +58,7 @@ extern int hpet_rtc_timer_init(void);
extern int apic_is_clustered_box(void);
extern int hpet_use_timer;
+extern unsigned long hpet_address;
#ifdef CONFIG_HPET_EMULATE_RTC
extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
_
Patches currently in -mm which might be from johnstul@xxxxxxxxxx are
gtod-persistent-clock-support-core.patch
gtod-persistent-clock-support-i386.patch
hrtimers-add-state-tracking.patch
hrtimers-clean-up-callback-tracking.patch
hrtimers-move-and-add-documentation.patch
acpi-include-fix.patch
acpi-cleanups-allow-early-access-to-pmtimer.patch
clockevents-core.patch
clockevents-i386-drivers.patch
high-res-timers-core.patch
dynticks-core.patch
dynticks-add-nohz-stats-to-proc-stat.patch
dynticks-i386-support-idle-handler-callbacks.patch
debugging-feature-add-proc-timer_stat.patch
generic-vsyscall-gtod-support-for-generic_time.patch
time-x86_64-hpet_address-cleanup.patch
time-x86_64-split-x86_64-kernel-timec-up.patch
time-x86_64-convert-x86_64-to-use-generic_time.patch
time-x86_64-re-enable-vsyscall-support-for-x86_64.patch
-
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