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Subject[PATCH] Re: 2.4.21-pre3-ac1/2 and CONFIG_CPU_FREQ failure
Sorry for that, the attached patch should fix it. It updates the timer
notifier code to the version which got into 2.5.55.

Dominik

On Fri, Jan 10, 2003 at 02:38:56AM +0100, Richard A Nelson wrote:
> If CONFIG_CPU_FREQ is set, and CONFIG_SMP isn't,
> ./arch/i386/kernel/time.c will fail to compile at line 946:
>
> #if defined(CONFIG_CPU_FREQ) && !defined(CONFIG_SMP)
> cpufreq_register_notifier(&time_cpufreq_notifier_block,
> CPUFREQ_TRANSITION_NOTIFIER);
> #endif
>
> There is no definition of time_cpufreq_notifier_block

diff -ruN linux-original/arch/i386/kernel/elanfreq.c linux/arch/i386/kernel/elanfreq.c
--- linux-original/arch/i386/kernel/elanfreq.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/elanfreq.c 2003-01-10 09:47:07.000000000 +0100
@@ -31,8 +31,6 @@
#define REG_CSCIR 0x22 /* Chip Setup and Control Index Register */
#define REG_CSCDR 0x23 /* Chip Setup and Control Data Register */

-#define SAFE_FREQ 33000 /* every Elan CPU can run at 33 MHz */
-
static struct cpufreq_driver *elanfreq_driver;

/* Module parameter */
diff -ruN linux-original/arch/i386/kernel/longhaul.c linux/arch/i386/kernel/longhaul.c
--- linux-original/arch/i386/kernel/longhaul.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/longhaul.c 2003-01-10 09:46:56.000000000 +0100
@@ -1,5 +1,5 @@
/*
- * $Id: longhaul.c,v 1.77 2002/10/31 21:17:40 db Exp $
+ * $Id: longhaul.c,v 1.83 2003/01/02 22:16:26 db Exp $
*
* (C) 2001 Dave Jones. <davej@suse.de>
* (C) 2002 Padraig Brady. <padraig@antefacto.com>
diff -ruN linux-original/arch/i386/kernel/longrun.c linux/arch/i386/kernel/longrun.c
--- linux-original/arch/i386/kernel/longrun.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/longrun.c 2003-01-10 09:46:50.000000000 +0100
@@ -1,5 +1,5 @@
/*
- * $Id: longrun.c,v 1.14 2002/10/31 21:17:40 db Exp $
+ * $Id: longrun.c,v 1.18 2003/01/02 22:16:26 db Exp $
*
* (C) 2002 Dominik Brodowski <linux@brodo.de>
*
diff -ruN linux-original/arch/i386/kernel/p4-clockmod.c linux/arch/i386/kernel/p4-clockmod.c
--- linux-original/arch/i386/kernel/p4-clockmod.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/p4-clockmod.c 2003-01-10 09:46:17.000000000 +0100
@@ -213,7 +213,7 @@
}


-int __init cpufreq_p4_init(void)
+static int __init cpufreq_p4_init(void)
{
struct cpuinfo_x86 *c = cpu_data;
int cpuid;
@@ -245,6 +245,16 @@
}

printk(KERN_INFO PFX "P4/Xeon(TM) CPU On-Demand Clock Modulation available\n");
+
+ if (!stock_freq) {
+ if (cpu_khz)
+ stock_freq = cpu_khz;
+ else {
+ printk(KERN_INFO PFX "unknown core frequency - please use module parameter 'stock_freq'\n");
+ return -EINVAL;
+ }
+ }
+
driver = kmalloc(sizeof(struct cpufreq_driver) +
NR_CPUS * sizeof(struct cpufreq_policy), GFP_KERNEL);
if (!driver)
@@ -252,9 +262,6 @@

driver->policy = (struct cpufreq_policy *) (driver + 1);

- if (!stock_freq)
- stock_freq = cpu_khz;
-
#ifdef CONFIG_CPU_FREQ_24_API
for (i=0;i<NR_CPUS;i++) {
driver->cpu_cur_freq[i] = stock_freq;
@@ -290,7 +297,7 @@
}


-void __exit cpufreq_p4_exit(void)
+static void __exit cpufreq_p4_exit(void)
{
unsigned int i;

diff -ruN linux-original/arch/i386/kernel/powernow-k6.c linux/arch/i386/kernel/powernow-k6.c
--- linux-original/arch/i386/kernel/powernow-k6.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/powernow-k6.c 2003-01-10 09:46:29.000000000 +0100
@@ -1,5 +1,5 @@
/*
- * $Id: powernow-k6.c,v 1.36 2002/10/31 21:17:40 db Exp $
+ * $Id: powernow-k6.c,v 1.42 2003/01/02 22:41:08 db Exp $
* This file was part of Powertweak Linux (http://powertweak.sf.net)
* and is shared with the Linux Kernel module.
*
diff -ruN linux-original/arch/i386/kernel/setup.c linux/arch/i386/kernel/setup.c
--- linux-original/arch/i386/kernel/setup.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/setup.c 2003-01-10 09:42:38.000000000 +0100
@@ -104,8 +104,6 @@
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/seq_file.h>
-#include <linux/notifier.h>
-#include <linux/cpufreq.h>
#include <asm/processor.h>
#include <linux/console.h>
#include <asm/mtrr.h>
@@ -209,40 +207,6 @@
#define RAMDISK_LOAD_FLAG 0x4000


-#ifdef CONFIG_CPU_FREQ
-static unsigned long loops_per_jiffy_ref = 0;
-static unsigned int ref_freq = 0;
-
-static int
-loops_per_jiffy_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
- void *data)
-{
- struct cpufreq_freqs *freq = data;
-
- if (!loops_per_jiffy_ref) {
- loops_per_jiffy_ref = cpu_data[freq->cpu].loops_per_jiffy;
- ref_freq = freq->old;
- }
-
- switch (val) {
- case CPUFREQ_PRECHANGE:
- if (freq->old < freq->new)
- cpu_data[freq->cpu].loops_per_jiffy = cpufreq_scale(loops_per_jiffy_ref, ref_freq, freq->new);
- break;
- case CPUFREQ_POSTCHANGE:
- if (freq->new < freq->old)
- cpu_data[freq->cpu].loops_per_jiffy = cpufreq_scale(loops_per_jiffy_ref, ref_freq, freq->new);
- break;
- }
-
- return 0;
-}
-
-static struct notifier_block loops_per_jiffy_cpufreq_notifier_block = {
- .notifier_call = loops_per_jiffy_cpufreq_notifier
-};
-#endif
-
#ifdef CONFIG_VISWS
char visws_board_type = -1;
char visws_board_rev = -1;
@@ -2912,11 +2876,6 @@
for ( i = 0 ; i < NCAPINTS ; i++ )
boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
}
-#ifdef CONFIG_CPU_FREQ
- if (c == &boot_cpu_data) {
- cpufreq_register_notifier(&loops_per_jiffy_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER);
- }
-#endif

printk(KERN_DEBUG "CPU: Common caps: %08x %08x %08x %08x\n",
boot_cpu_data.x86_capability[0],
diff -ruN linux-original/arch/i386/kernel/speedstep.c linux/arch/i386/kernel/speedstep.c
--- linux-original/arch/i386/kernel/speedstep.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/speedstep.c 2003-01-10 09:46:41.000000000 +0100
@@ -1,5 +1,5 @@
/*
- * $Id: speedstep.c,v 1.58 2002/11/11 15:35:46 db Exp $
+ * $Id: speedstep.c,v 1.64 2003/01/02 22:16:26 db Exp $
*
* (C) 2001 Dave Jones, Arjan van de ven.
* (C) 2002 Dominik Brodowski <linux@brodo.de>
@@ -659,7 +659,7 @@
return -ENODEV;
}

- dprintk(KERN_INFO "cpufreq: Intel(R) SpeedStep(TM) support $Revision: 1.58 $\n");
+ dprintk(KERN_INFO "cpufreq: Intel(R) SpeedStep(TM) support $Revision: 1.64 $\n");
dprintk(KERN_DEBUG "cpufreq: chipset 0x%x - processor 0x%x\n",
speedstep_chipset, speedstep_processor);

diff -ruN linux-original/arch/i386/kernel/time.c linux/arch/i386/kernel/time.c
--- linux-original/arch/i386/kernel/time.c 2003-01-10 09:40:32.000000000 +0100
+++ linux/arch/i386/kernel/time.c 2003-01-10 09:45:34.000000000 +0100
@@ -42,6 +42,7 @@
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/smp.h>
+#include <linux/notifier.h>
#include <linux/cpufreq.h>

#include <asm/io.h>
@@ -827,46 +828,45 @@
}

#ifdef CONFIG_CPU_FREQ
+static unsigned int ref_freq = 0;
+static unsigned long loops_per_jiffy_ref = 0;

+#ifndef CONFIG_SMP
static unsigned long fast_gettimeoffset_ref = 0;
static unsigned long cpu_khz_ref = 0;
-static unsigned int ref_freq = 0;
+#endif

static int
-tsc_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
+time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data)
{
struct cpufreq_freqs *freq = data;

- if (!use_tsc)
- return 0;
-
- if (!fast_gettimeoffset_ref) {
+ if (!ref_freq) {
+ ref_freq = freq->old;
+ loops_per_jiffy_ref = cpu_data[freq->cpu].loops_per_jiffy;
+#ifndef CONFIG_SMP
fast_gettimeoffset_ref = fast_gettimeoffset_quotient;
cpu_khz_ref = cpu_khz;
- ref_freq = freq->old;
+#endif
}

- switch (val) {
- case CPUFREQ_PRECHANGE:
- if (freq->old < freq->new) {
- fast_gettimeoffset_quotient = cpufreq_scale(fast_gettimeoffset_ref, freq->new, ref_freq);
- cpu_khz = cpufreq_scale(cpu_khz_ref, ref_freq, freq->new);
- }
- break;
- case CPUFREQ_POSTCHANGE:
- if (freq->new < freq->old) {
- fast_gettimeoffset_quotient = cpufreq_scale(fast_gettimeoffset_ref, freq->new, ref_freq);
- cpu_khz = cpufreq_scale(cpu_khz_ref, ref_freq, freq->new);
+ if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) ||
+ (val == CPUFREQ_POSTCHANGE && freq->old > freq->new)) {
+ cpu_data[freq->cpu].loops_per_jiffy = cpufreq_scale(loops_per_jiffy_ref, ref_freq, freq->new);
+#ifndef CONFIG_SMP
+ if (use_tsc) {
+ fast_gettimeoffset_quotient = cpufreq_scale(fast_gettimeoffset_ref, freq->new, ref_freq);
+ cpu_khz = cpufreq_scale(cpu_khz_ref, ref_freq, freq->new);
}
- break;
+#endif
}

return 0;
}

-static struct notifier_block tsc_cpufreq_notifier_block = {
- .notifier_call = tsc_cpufreq_notifier
+static struct notifier_block time_cpufreq_notifier_block = {
+ .notifier_call = time_cpufreq_notifier
};
#endif

@@ -942,7 +942,7 @@
}
}

-#if defined(CONFIG_CPU_FREQ) && !defined(CONFIG_SMP)
+#ifdef CONFIG_CPU_FREQ
cpufreq_register_notifier(&time_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER);
#endif

diff -ruN linux-original/include/linux/cpufreq.h linux/include/linux/cpufreq.h
--- linux-original/include/linux/cpufreq.h 2003-01-10 09:40:46.000000000 +0100
+++ linux/include/linux/cpufreq.h 2003-01-10 09:48:35.000000000 +0100
@@ -5,7 +5,7 @@
* (C) 2002 Dominik Brodowski <linux@brodo.de>
*
*
- * $Id: cpufreq.h,v 1.29 2002/11/11 15:35:47 db Exp $
+ * $Id: cpufreq.h,v 1.32 2003/01/02 22:16:27 db Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
diff -ruN linux-original/kernel/cpufreq.c linux/kernel/cpufreq.c
--- linux-original/kernel/cpufreq.c 2003-01-10 09:40:52.000000000 +0100
+++ linux/kernel/cpufreq.c 2003-01-10 09:47:48.000000000 +0100
@@ -4,7 +4,7 @@
* Copyright (C) 2001 Russell King
* (C) 2002 Dominik Brodowski <linux@brodo.de>
*
- * $Id: cpufreq.c,v 1.50 2002/11/11 15:35:48 db Exp $
+ * $Id: cpufreq.c,v 1.55 2003/01/10 08:39:18 db Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
-
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