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Subject[PATCH] Re: 2.4.21-pre3-ac1/2 and CONFIG_CPU_FREQ failure [rescued]
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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