Merge branch 'x86/urgent' into x86/cleanups

5 files changed, 75 insertions, 92 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 4e7271999a7..84bb395038d 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -737,63 +737,44 @@ static int find_psb_table(struct powernow_k8_data *data)
 #ifdef CONFIG_X86_POWERNOW_K8_ACPI
 static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index)
 {
-	if (!data->acpi_data->state_count || (cpu_family == CPU_HW_PSTATE))
+	if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE))
 		return;
 
-	data->irt = (data->acpi_data->states[index].control >> IRT_SHIFT) & IRT_MASK;
-	data->rvo = (data->acpi_data->states[index].control >> RVO_SHIFT) & RVO_MASK;
-	data->exttype = (data->acpi_data->states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
-	data->plllock = (data->acpi_data->states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
-	data->vidmvs = 1 << ((data->acpi_data->states[index].control >> MVS_SHIFT) & MVS_MASK);
-	data->vstable = (data->acpi_data->states[index].control >> VST_SHIFT) & VST_MASK;
-}
-
-
-static struct acpi_processor_performance *acpi_perf_data;
-static int preregister_valid;
-
-static int powernow_k8_cpu_preinit_acpi(void)
-{
-	acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
-	if (!acpi_perf_data)
-		return -ENODEV;
-
-	if (acpi_processor_preregister_performance(acpi_perf_data))
-		return -ENODEV;
-	else
-		preregister_valid = 1;
-	return 0;
+	data->irt = (data->acpi_data.states[index].control >> IRT_SHIFT) & IRT_MASK;
+	data->rvo = (data->acpi_data.states[index].control >> RVO_SHIFT) & RVO_MASK;
+	data->exttype = (data->acpi_data.states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
+	data->plllock = (data->acpi_data.states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
+	data->vidmvs = 1 << ((data->acpi_data.states[index].control >> MVS_SHIFT) & MVS_MASK);
+	data->vstable = (data->acpi_data.states[index].control >> VST_SHIFT) & VST_MASK;
 }
 
 static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
 {
 	struct cpufreq_frequency_table *powernow_table;
 	int ret_val;
-	int cpu = 0;
 
-	data->acpi_data = percpu_ptr(acpi_perf_data, cpu);
-	if (acpi_processor_register_performance(data->acpi_data, data->cpu)) {
+	if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
 		dprintk("register performance failed: bad ACPI data\n");
 		return -EIO;
 	}
 
 	/* verify the data contained in the ACPI structures */
-	if (data->acpi_data->state_count <= 1) {
+	if (data->acpi_data.state_count <= 1) {
 		dprintk("No ACPI P-States\n");
 		goto err_out;
 	}
 
-	if ((data->acpi_data->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
-		(data->acpi_data->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
+	if ((data->acpi_data.control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
+		(data->acpi_data.status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
 		dprintk("Invalid control/status registers (%x - %x)\n",
-			data->acpi_data->control_register.space_id,
-			data->acpi_data->status_register.space_id);
+			data->acpi_data.control_register.space_id,
+			data->acpi_data.status_register.space_id);
 		goto err_out;
 	}
 
 	/* fill in data->powernow_table */
 	powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
-		* (data->acpi_data->state_count + 1)), GFP_KERNEL);
+		* (data->acpi_data.state_count + 1)), GFP_KERNEL);
 	if (!powernow_table) {
 		dprintk("powernow_table memory alloc failure\n");
 		goto err_out;
@@ -806,12 +787,12 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
 	if (ret_val)
 		goto err_out_mem;
 
-	powernow_table[data->acpi_data->state_count].frequency = CPUFREQ_TABLE_END;
-	powernow_table[data->acpi_data->state_count].index = 0;
+	powernow_table[data->acpi_data.state_count].frequency = CPUFREQ_TABLE_END;
+	powernow_table[data->acpi_data.state_count].index = 0;
 	data->powernow_table = powernow_table;
 
 	/* fill in data */
-	data->numps = data->acpi_data->state_count;
+	data->numps = data->acpi_data.state_count;
 	if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
 		print_basics(data);
 	powernow_k8_acpi_pst_values(data, 0);
@@ -819,31 +800,16 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
 	/* notify BIOS that we exist */
 	acpi_processor_notify_smm(THIS_MODULE);
 
-	/* determine affinity, from ACPI if available */
-	if (preregister_valid) {
-		if ((data->acpi_data->shared_type == CPUFREQ_SHARED_TYPE_ALL) ||
-			(data->acpi_data->shared_type == CPUFREQ_SHARED_TYPE_ANY))
-			data->starting_core_affinity = data->acpi_data->shared_cpu_map;
-		else
-			data->starting_core_affinity = cpumask_of_cpu(data->cpu);
-	} else {
-	/* best guess from family if not */
-		if (cpu_family == CPU_HW_PSTATE)
-			data->starting_core_affinity = cpumask_of_cpu(data->cpu);
-		else
-			data->starting_core_affinity = per_cpu(cpu_core_map, data->cpu);
-	}
-
 	return 0;
 
 err_out_mem:
 	kfree(powernow_table);
 
 err_out:
-	acpi_processor_unregister_performance(data->acpi_data, data->cpu);
+	acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
 
 	/* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */
-	data->acpi_data->state_count = 0;
+	data->acpi_data.state_count = 0;
 
 	return -ENODEV;
 }
@@ -855,10 +821,10 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpuf
 	rdmsr(MSR_PSTATE_CUR_LIMIT, hi, lo);
 	data->max_hw_pstate = (hi & HW_PSTATE_MAX_MASK) >> HW_PSTATE_MAX_SHIFT;
 
-	for (i = 0; i < data->acpi_data->state_count; i++) {
+	for (i = 0; i < data->acpi_data.state_count; i++) {
 		u32 index;
 
-		index = data->acpi_data->states[i].control & HW_PSTATE_MASK;
+		index = data->acpi_data.states[i].control & HW_PSTATE_MASK;
 		if (index > data->max_hw_pstate) {
 			printk(KERN_ERR PFX "invalid pstate %d - bad value %d.\n", i, index);
 			printk(KERN_ERR PFX "Please report to BIOS manufacturer\n");
@@ -874,7 +840,7 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpuf
 
 		powernow_table[i].index = index;
 
-		powernow_table[i].frequency = data->acpi_data->states[i].core_frequency * 1000;
+		powernow_table[i].frequency = data->acpi_data.states[i].core_frequency * 1000;
 	}
 	return 0;
 }
@@ -883,16 +849,16 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
 {
 	int i;
 	int cntlofreq = 0;
-	for (i = 0; i < data->acpi_data->state_count; i++) {
+	for (i = 0; i < data->acpi_data.state_count; i++) {
 		u32 fid;
 		u32 vid;
 
 		if (data->exttype) {
-			fid = data->acpi_data->states[i].status & EXT_FID_MASK;
-			vid = (data->acpi_data->states[i].status >> VID_SHIFT) & EXT_VID_MASK;
+			fid = data->acpi_data.states[i].status & EXT_FID_MASK;
+			vid = (data->acpi_data.states[i].status >> VID_SHIFT) & EXT_VID_MASK;
 		} else {
-			fid = data->acpi_data->states[i].control & FID_MASK;
-			vid = (data->acpi_data->states[i].control >> VID_SHIFT) & VID_MASK;
+			fid = data->acpi_data.states[i].control & FID_MASK;
+			vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK;
 		}
 
 		dprintk("   %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
@@ -933,10 +899,10 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
 				cntlofreq = i;
 		}
 
-		if (powernow_table[i].frequency != (data->acpi_data->states[i].core_frequency * 1000)) {
+		if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) {
 			printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n",
 				powernow_table[i].frequency,
-				(unsigned int) (data->acpi_data->states[i].core_frequency * 1000));
+				(unsigned int) (data->acpi_data.states[i].core_frequency * 1000));
 			powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
 			continue;
 		}
@@ -946,12 +912,11 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
 
 static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
 {
-	if (data->acpi_data->state_count)
-		acpi_processor_unregister_performance(data->acpi_data, data->cpu);
+	if (data->acpi_data.state_count)
+		acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
 }
 
 #else
-static int powernow_k8_cpu_preinit_acpi(void) { return -ENODEV; }
 static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) { return -ENODEV; }
 static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data) { return; }
 static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index) { return; }
@@ -1136,7 +1101,7 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
 static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
 {
 	struct powernow_k8_data *data;
-	cpumask_t oldmask = CPU_MASK_ALL;
+	cpumask_t oldmask;
 	int rc;
 
 	if (!cpu_online(pol->cpu))
@@ -1209,7 +1174,10 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
 	/* run on any CPU again */
 	set_cpus_allowed_ptr(current, &oldmask);
 
-	pol->cpus = data->starting_core_affinity;
+	if (cpu_family == CPU_HW_PSTATE)
+		pol->cpus = cpumask_of_cpu(pol->cpu);
+	else
+		pol->cpus = per_cpu(cpu_core_map, pol->cpu);
 	data->available_cores = &(pol->cpus);
 
 	/* Take a crude guess here.
@@ -1332,7 +1300,6 @@ static int __cpuinit powernowk8_init(void)
 	}
 
 	if (supported_cpus == num_online_cpus()) {
-		powernow_k8_cpu_preinit_acpi();
 		printk(KERN_INFO PFX "Found %d %s "
 			"processors (%d cpu cores) (" VERSION ")\n",
 			num_online_nodes(),
@@ -1349,10 +1316,6 @@ static void __exit powernowk8_exit(void)
 	dprintk("exit\n");
 
 	cpufreq_unregister_driver(&cpufreq_amd64_driver);
-
-#ifdef CONFIG_X86_POWERNOW_K8_ACPI
-	free_percpu(acpi_perf_data);
-#endif
 }
 
 MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com>");
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.h b/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
index a62612cd4be..ab48cfed4d9 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
@@ -33,13 +33,12 @@ struct powernow_k8_data {
 #ifdef CONFIG_X86_POWERNOW_K8_ACPI
 	/* the acpi table needs to be kept. it's only available if ACPI was
 	 * used to determine valid frequency/vid/fid states */
-	struct acpi_processor_performance *acpi_data;
+	struct acpi_processor_performance acpi_data;
 #endif
 	/* we need to keep track of associated cores, but let cpufreq
 	 * handle hotplug events - so just point at cpufreq pol->cpus
 	 * structure */
 	cpumask_t *available_cores;
-	cpumask_t starting_core_affinity;
 };
 
 
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 3fa4e926b51..6a44d646599 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -88,6 +88,8 @@ static ssize_t cpuid_read(struct file *file, char __user *buf,
 	struct cpuid_regs cmd;
 	int cpu = iminor(file->f_path.dentry->d_inode);
 	u64 pos = *ppos;
+	ssize_t bytes = 0;
+	int err = 0;
 
 	if (count % 16)
 		return -EINVAL;	/* Invalid chunk size */
@@ -95,14 +97,19 @@ static ssize_t cpuid_read(struct file *file, char __user *buf,
 	for (; count; count -= 16) {
 		cmd.eax = pos;
 		cmd.ecx = pos >> 32;
-		smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1);
-		if (copy_to_user(tmp, &cmd, 16))
-			return -EFAULT;
+		err = smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1);
+		if (err)
+			break;
+		if (copy_to_user(tmp, &cmd, 16)) {
+			err = -EFAULT;
+			break;
+		}
 		tmp += 16;
+		bytes += 16;
 		*ppos = ++pos;
 	}
 
-	return tmp - buf;
+	return bytes ? bytes : err;
 }
 
 static int cpuid_open(struct inode *inode, struct file *file)
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index e4393808688..2e2af5d1819 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -72,21 +72,28 @@ static ssize_t msr_read(struct file *file, char __user *buf,
 	u32 data[2];
 	u32 reg = *ppos;
 	int cpu = iminor(file->f_path.dentry->d_inode);
-	int err;
+	int err = 0;
+	ssize_t bytes = 0;
 
 	if (count % 8)
 		return -EINVAL;	/* Invalid chunk size */
 
 	for (; count; count -= 8) {
 		err = rdmsr_safe_on_cpu(cpu, reg, &data[0], &data[1]);
-		if (err)
-			return -EIO;
-		if (copy_to_user(tmp, &data, 8))
-			return -EFAULT;
+		if (err) {
+			if (err == -EFAULT) /* Fix idiotic error code */
+				err = -EIO;
+			break;
+		}
+		if (copy_to_user(tmp, &data, 8)) {
+			err = -EFAULT;
+			break;
+		}
 		tmp += 2;
+		bytes += 8;
 	}
 
-	return ((char __user *)tmp) - buf;
+	return bytes ? bytes : err;
 }
 
 static ssize_t msr_write(struct file *file, const char __user *buf,
@@ -96,21 +103,28 @@ static ssize_t msr_write(struct file *file, const char __user *buf,
 	u32 data[2];
 	u32 reg = *ppos;
 	int cpu = iminor(file->f_path.dentry->d_inode);
-	int err;
+	int err = 0;
+	ssize_t bytes = 0;
 
 	if (count % 8)
 		return -EINVAL;	/* Invalid chunk size */
 
 	for (; count; count -= 8) {
-		if (copy_from_user(&data, tmp, 8))
-			return -EFAULT;
+		if (copy_from_user(&data, tmp, 8)) {
+			err = -EFAULT;
+			break;
+		}
 		err = wrmsr_safe_on_cpu(cpu, reg, data[0], data[1]);
-		if (err)
-			return -EIO;
+		if (err) {
+			if (err == -EFAULT) /* Fix idiotic error code */
+				err = -EIO;
+			break;
+		}
 		tmp += 2;
+		bytes += 8;
 	}
 
-	return ((char __user *)tmp) - buf;
+	return bytes ? bytes : err;
 }
 
 static int msr_open(struct inode *inode, struct file *file)
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 9bed5cae4bd..8e786b0d665 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -314,7 +314,7 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
 			mark_tsc_unstable("cpufreq changes");
 	}
 
-	set_cyc2ns_scale(tsc_khz_ref, freq->cpu);
+	set_cyc2ns_scale(tsc_khz, freq->cpu);
 
 	return 0;
 }