Merge branch 'linus' into x86/urgent

Merge needed to go past commit 7ca43e756 (mm: use debug_kmap_atomic)
and fix it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 97 insertions, 66 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
index cdac7d62369..2e3c6862657 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
@@ -16,12 +16,16 @@
 #include <linux/slab.h>
 
 #include <asm/msr.h>
+#include <asm/tsc.h>
 #include "speedstep-lib.h"
 
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-lib", msg)
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
+		"speedstep-lib", msg)
+
+#define PFX "speedstep-lib: "
 
 #ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
-static int relaxed_check = 0;
+static int relaxed_check;
 #else
 #define relaxed_check 0
 #endif
@@ -30,14 +34,14 @@ static int relaxed_check = 0;
  *                   GET PROCESSOR CORE SPEED IN KHZ                 *
  *********************************************************************/
 
-static unsigned int pentium3_get_frequency (unsigned int processor)
+static unsigned int pentium3_get_frequency(unsigned int processor)
 {
-        /* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
+	/* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
 	struct {
 		unsigned int ratio;	/* Frequency Multiplier (x10) */
 		u8 bitmap;		/* power on configuration bits
 					[27, 25:22] (in MSR 0x2a) */
-	} msr_decode_mult [] = {
+	} msr_decode_mult[] = {
 		{ 30, 0x01 },
 		{ 35, 0x05 },
 		{ 40, 0x02 },
@@ -52,7 +56,7 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
 		{ 85, 0x26 },
 		{ 90, 0x20 },
 		{ 100, 0x2b },
-		{ 0, 0xff }     /* error or unknown value */
+		{ 0, 0xff }	/* error or unknown value */
 	};
 
 	/* PIII(-M) FSB settings: see table b1-b of 24547206.pdf */
@@ -60,7 +64,7 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
 		unsigned int value;	/* Front Side Bus speed in MHz */
 		u8 bitmap;		/* power on configuration bits [18: 19]
 					(in MSR 0x2a) */
-	} msr_decode_fsb [] = {
+	} msr_decode_fsb[] = {
 		{  66, 0x0 },
 		{ 100, 0x2 },
 		{ 133, 0x1 },
@@ -85,7 +89,7 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
 	}
 
 	/* decode the multiplier */
-	if (processor == SPEEDSTEP_PROCESSOR_PIII_C_EARLY) {
+	if (processor == SPEEDSTEP_CPU_PIII_C_EARLY) {
 		dprintk("workaround for early PIIIs\n");
 		msr_lo &= 0x03c00000;
 	} else
@@ -97,9 +101,10 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
 		j++;
 	}
 
-	dprintk("speed is %u\n", (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
+	dprintk("speed is %u\n",
+		(msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
 
-	return (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100);
+	return msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100;
 }
 
 
@@ -112,20 +117,23 @@ static unsigned int pentiumM_get_frequency(void)
 
 	/* see table B-2 of 24547212.pdf */
 	if (msr_lo & 0x00040000) {
-		printk(KERN_DEBUG "speedstep-lib: PM - invalid FSB: 0x%x 0x%x\n", msr_lo, msr_tmp);
+		printk(KERN_DEBUG PFX "PM - invalid FSB: 0x%x 0x%x\n",
+				msr_lo, msr_tmp);
 		return 0;
 	}
 
 	msr_tmp = (msr_lo >> 22) & 0x1f;
-	dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * 100 * 1000));
+	dprintk("bits 22-26 are 0x%x, speed is %u\n",
+			msr_tmp, (msr_tmp * 100 * 1000));
 
-	return (msr_tmp * 100 * 1000);
+	return msr_tmp * 100 * 1000;
 }
 
 static unsigned int pentium_core_get_frequency(void)
 {
 	u32 fsb = 0;
 	u32 msr_lo, msr_tmp;
+	int ret;
 
 	rdmsr(MSR_FSB_FREQ, msr_lo, msr_tmp);
 	/* see table B-2 of 25366920.pdf */
@@ -153,12 +161,15 @@ static unsigned int pentium_core_get_frequency(void)
 	}
 
 	rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp);
-	dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n", msr_lo, msr_tmp);
+	dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n",
+			msr_lo, msr_tmp);
 
 	msr_tmp = (msr_lo >> 22) & 0x1f;
-	dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * fsb));
+	dprintk("bits 22-26 are 0x%x, speed is %u\n",
+			msr_tmp, (msr_tmp * fsb));
 
-	return (msr_tmp * fsb);
+	ret = (msr_tmp * fsb);
+	return ret;
 }
 
 
@@ -167,6 +178,16 @@ static unsigned int pentium4_get_frequency(void)
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 	u32 msr_lo, msr_hi, mult;
 	unsigned int fsb = 0;
+	unsigned int ret;
+	u8 fsb_code;
+
+	/* Pentium 4 Model 0 and 1 do not have the Core Clock Frequency
+	 * to System Bus Frequency Ratio Field in the Processor Frequency
+	 * Configuration Register of the MSR. Therefore the current
+	 * frequency cannot be calculated and has to be measured.
+	 */
+	if (c->x86_model < 2)
+		return cpu_khz;
 
 	rdmsr(0x2c, msr_lo, msr_hi);
 
@@ -177,62 +198,61 @@ static unsigned int pentium4_get_frequency(void)
 	 * revision #12 in Table B-1: MSRs in the Pentium 4 and
 	 * Intel Xeon Processors, on page B-4 and B-5.
 	 */
-	if (c->x86_model < 2)
+	fsb_code = (msr_lo >> 16) & 0x7;
+	switch (fsb_code) {
+	case 0:
 		fsb = 100 * 1000;
-	else {
-		u8 fsb_code = (msr_lo >> 16) & 0x7;
-		switch (fsb_code) {
-		case 0:
-			fsb = 100 * 1000;
-			break;
-		case 1:
-			fsb = 13333 * 10;
-			break;
-		case 2:
-			fsb = 200 * 1000;
-			break;
-		}
+		break;
+	case 1:
+		fsb = 13333 * 10;
+		break;
+	case 2:
+		fsb = 200 * 1000;
+		break;
 	}
 
 	if (!fsb)
-		printk(KERN_DEBUG "speedstep-lib: couldn't detect FSB speed. Please send an e-mail to <linux@brodo.de>\n");
+		printk(KERN_DEBUG PFX "couldn't detect FSB speed. "
+				"Please send an e-mail to <linux@brodo.de>\n");
 
 	/* Multiplier. */
 	mult = msr_lo >> 24;
 
-	dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n", fsb, mult, (fsb * mult));
+	dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n",
+			fsb, mult, (fsb * mult));
 
-	return (fsb * mult);
+	ret = (fsb * mult);
+	return ret;
 }
 
 
-unsigned int speedstep_get_processor_frequency(unsigned int processor)
+unsigned int speedstep_get_frequency(unsigned int processor)
 {
 	switch (processor) {
-	case SPEEDSTEP_PROCESSOR_PCORE:
+	case SPEEDSTEP_CPU_PCORE:
 		return pentium_core_get_frequency();
-	case SPEEDSTEP_PROCESSOR_PM:
+	case SPEEDSTEP_CPU_PM:
 		return pentiumM_get_frequency();
-	case SPEEDSTEP_PROCESSOR_P4D:
-	case SPEEDSTEP_PROCESSOR_P4M:
+	case SPEEDSTEP_CPU_P4D:
+	case SPEEDSTEP_CPU_P4M:
 		return pentium4_get_frequency();
-	case SPEEDSTEP_PROCESSOR_PIII_T:
-	case SPEEDSTEP_PROCESSOR_PIII_C:
-	case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
+	case SPEEDSTEP_CPU_PIII_T:
+	case SPEEDSTEP_CPU_PIII_C:
+	case SPEEDSTEP_CPU_PIII_C_EARLY:
 		return pentium3_get_frequency(processor);
 	default:
 		return 0;
 	};
 	return 0;
 }
-EXPORT_SYMBOL_GPL(speedstep_get_processor_frequency);
+EXPORT_SYMBOL_GPL(speedstep_get_frequency);
 
 
 /*********************************************************************
  *                 DETECT SPEEDSTEP-CAPABLE PROCESSOR                *
  *********************************************************************/
 
-unsigned int speedstep_detect_processor (void)
+unsigned int speedstep_detect_processor(void)
 {
 	struct cpuinfo_x86 *c = &cpu_data(0);
 	u32 ebx, msr_lo, msr_hi;
@@ -261,7 +281,7 @@ unsigned int speedstep_detect_processor (void)
 			 * sample has ebx = 0x0f, production has 0x0e.
 			 */
 			if ((ebx == 0x0e) || (ebx == 0x0f))
-				return SPEEDSTEP_PROCESSOR_P4M;
+				return SPEEDSTEP_CPU_P4M;
 			break;
 		case 7:
 			/*
@@ -272,7 +292,7 @@ unsigned int speedstep_detect_processor (void)
 			 * samples are only of B-stepping...
 			 */
 			if (ebx == 0x0e)
-				return SPEEDSTEP_PROCESSOR_P4M;
+				return SPEEDSTEP_CPU_P4M;
 			break;
 		case 9:
 			/*
@@ -288,10 +308,13 @@ unsigned int speedstep_detect_processor (void)
 			 * M-P4-Ms may have either ebx=0xe or 0xf [see above]
 			 * M-P4/533 have either ebx=0xe or 0xf. [25317607.pdf]
 			 * also, M-P4M HTs have ebx=0x8, too
-			 * For now, they are distinguished by the model_id string
+			 * For now, they are distinguished by the model_id
+			 * string
 			 */
-			if ((ebx == 0x0e) || (strstr(c->x86_model_id,"Mobile Intel(R) Pentium(R) 4") != NULL))
-				return SPEEDSTEP_PROCESSOR_P4M;
+			if ((ebx == 0x0e) ||
+				(strstr(c->x86_model_id,
+				    "Mobile Intel(R) Pentium(R) 4") != NULL))
+				return SPEEDSTEP_CPU_P4M;
 			break;
 		default:
 			break;
@@ -301,7 +324,8 @@ unsigned int speedstep_detect_processor (void)
 
 	switch (c->x86_model) {
 	case 0x0B: /* Intel PIII [Tualatin] */
-		/* cpuid_ebx(1) is 0x04 for desktop PIII, 0x06 for mobile PIII-M */
+		/* cpuid_ebx(1) is 0x04 for desktop PIII,
+		 * 0x06 for mobile PIII-M */
 		ebx = cpuid_ebx(0x00000001);
 		dprintk("ebx is %x\n", ebx);
 
@@ -313,14 +337,15 @@ unsigned int speedstep_detect_processor (void)
 		/* So far all PIII-M processors support SpeedStep. See
 		 * Intel's 24540640.pdf of June 2003
 		 */
-		return SPEEDSTEP_PROCESSOR_PIII_T;
+		return SPEEDSTEP_CPU_PIII_T;
 
 	case 0x08: /* Intel PIII [Coppermine] */
 
 		/* all mobile PIII Coppermines have FSB 100 MHz
 		 * ==> sort out a few desktop PIIIs. */
 		rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_hi);
-		dprintk("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n", msr_lo, msr_hi);
+		dprintk("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n",
+				msr_lo, msr_hi);
 		msr_lo &= 0x00c0000;
 		if (msr_lo != 0x0080000)
 			return 0;
@@ -332,13 +357,15 @@ unsigned int speedstep_detect_processor (void)
 		 * bit 56 or 57 is set
 		 */
 		rdmsr(MSR_IA32_PLATFORM_ID, msr_lo, msr_hi);
-		dprintk("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n", msr_lo, msr_hi);
-		if ((msr_hi & (1<<18)) && (relaxed_check ? 1 : (msr_hi & (3<<24)))) {
+		dprintk("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n",
+				msr_lo, msr_hi);
+		if ((msr_hi & (1<<18)) &&
+		    (relaxed_check ? 1 : (msr_hi & (3<<24)))) {
 			if (c->x86_mask == 0x01) {
 				dprintk("early PIII version\n");
-				return SPEEDSTEP_PROCESSOR_PIII_C_EARLY;
+				return SPEEDSTEP_CPU_PIII_C_EARLY;
 			} else
-				return SPEEDSTEP_PROCESSOR_PIII_C;
+				return SPEEDSTEP_CPU_PIII_C;
 		}
 
 	default:
@@ -369,7 +396,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
 	dprintk("trying to determine both speeds\n");
 
 	/* get current speed */
-	prev_speed = speedstep_get_processor_frequency(processor);
+	prev_speed = speedstep_get_frequency(processor);
 	if (!prev_speed)
 		return -EIO;
 
@@ -379,7 +406,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
 
 	/* switch to low state */
 	set_state(SPEEDSTEP_LOW);
-	*low_speed = speedstep_get_processor_frequency(processor);
+	*low_speed = speedstep_get_frequency(processor);
 	if (!*low_speed) {
 		ret = -EIO;
 		goto out;
@@ -398,7 +425,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
 	if (transition_latency)
 		do_gettimeofday(&tv2);
 
-	*high_speed = speedstep_get_processor_frequency(processor);
+	*high_speed = speedstep_get_frequency(processor);
 	if (!*high_speed) {
 		ret = -EIO;
 		goto out;
@@ -426,9 +453,12 @@ unsigned int speedstep_get_freqs(unsigned int processor,
 		/* check if the latency measurement is too high or too low
 		 * and set it to a safe value (500uSec) in that case
 		 */
-		if (*transition_latency > 10000000 || *transition_latency < 50000) {
-			printk (KERN_WARNING "speedstep: frequency transition measured seems out of "
-					"range (%u nSec), falling back to a safe one of %u nSec.\n",
+		if (*transition_latency > 10000000 ||
+		    *transition_latency < 50000) {
+			printk(KERN_WARNING PFX "frequency transition "
+					"measured seems out of range (%u "
+					"nSec), falling back to a safe one of"
+					"%u nSec.\n",
 					*transition_latency, 500000);
 			*transition_latency = 500000;
 		}
@@ -436,15 +466,16 @@ unsigned int speedstep_get_freqs(unsigned int processor,
 
 out:
 	local_irq_restore(flags);
-	return (ret);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(speedstep_get_freqs);
 
 #ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
 module_param(relaxed_check, int, 0444);
-MODULE_PARM_DESC(relaxed_check, "Don't do all checks for speedstep capability.");
+MODULE_PARM_DESC(relaxed_check,
+		"Don't do all checks for speedstep capability.");
 #endif
 
-MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>");
-MODULE_DESCRIPTION ("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
-MODULE_LICENSE ("GPL");
+MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
+MODULE_DESCRIPTION("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
+MODULE_LICENSE("GPL");