Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq

* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] constify some data tables.
  [CPUFREQ] constify cpufreq_driver where possible.
  {rd,wr}msr_on_cpu SMP=n optimization
  [CPUFREQ] cpufreq_ondemand.c: don't use _WORK_NAR
  rdmsr_on_cpu, wrmsr_on_cpu
  [CPUFREQ] Revert default on deprecated config X86_SPEEDSTEP_CENTRINO_ACPI

16 files changed, 90 insertions, 31 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/Kconfig b/arch/i386/kernel/cpu/cpufreq/Kconfig
index 6c52182ca323..e912aae9473c 100644
--- a/arch/i386/kernel/cpu/cpufreq/Kconfig
+++ b/arch/i386/kernel/cpu/cpufreq/Kconfig
@@ -125,7 +125,6 @@ config X86_SPEEDSTEP_CENTRINO_ACPI
         bool "Use ACPI tables to decode valid frequency/voltage (deprecated)"
         depends on X86_SPEEDSTEP_CENTRINO && ACPI_PROCESSOR
         depends on !(X86_SPEEDSTEP_CENTRINO = y && ACPI_PROCESSOR = m)
-        default y
         help
           This is deprecated and this functionality is now merged into
           acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
diff --git a/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c b/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c
index 0d49d73d1b71..280b3177edbd 100644
--- a/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c
+++ b/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c
@@ -373,7 +373,7 @@ static int nforce2_cpu_exit(struct cpufreq_policy *policy)
         return 0;
 }
 
-static struct cpufreq_driver nforce2_driver = {
+static const struct cpufreq_driver nforce2_driver = {
         .name = "nforce2",
         .verify = nforce2_verify,
         .target = nforce2_target,
diff --git a/arch/i386/kernel/cpu/cpufreq/e_powersaver.c b/arch/i386/kernel/cpu/cpufreq/e_powersaver.c
index f43d98e11cc7..8bedaad1193b 100644
--- a/arch/i386/kernel/cpu/cpufreq/e_powersaver.c
+++ b/arch/i386/kernel/cpu/cpufreq/e_powersaver.c
@@ -293,7 +293,7 @@ static struct freq_attr* eps_attr[] = {
         NULL,
 };
 
-static struct cpufreq_driver eps_driver = {
+static const struct cpufreq_driver eps_driver = {
         .verify         = eps_verify,
         .target         = eps_target,
         .init           = eps_cpu_init,
diff --git a/arch/i386/kernel/cpu/cpufreq/elanfreq.c b/arch/i386/kernel/cpu/cpufreq/elanfreq.c
index f317276afa7a..6905de3a11e8 100644
--- a/arch/i386/kernel/cpu/cpufreq/elanfreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/elanfreq.c
@@ -267,7 +267,7 @@ static struct freq_attr* elanfreq_attr[] = {
 };
 
 
-static struct cpufreq_driver elanfreq_driver = {
+static const struct cpufreq_driver elanfreq_driver = {
         .get            = elanfreq_get_cpu_frequency,
         .verify         = elanfreq_verify,
         .target         = elanfreq_target,
diff --git a/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c b/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c
index 6667e9cceb9f..9a66cab7fe14 100644
--- a/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c
+++ b/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c
@@ -433,7 +433,7 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy)
  * cpufreq_gx_init:
  *   MediaGX/Geode GX initialize cpufreq driver
  */
-static struct cpufreq_driver gx_suspmod_driver = {
+static const struct cpufreq_driver gx_suspmod_driver = {
         .get            = gx_get_cpuspeed,
         .verify         = cpufreq_gx_verify,
         .target         = cpufreq_gx_target,
diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.c b/arch/i386/kernel/cpu/cpufreq/longhaul.c
index b59878a0d9b3..8cc6952d7772 100644
--- a/arch/i386/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.c
@@ -61,8 +61,8 @@ static int cpu_model;
 static unsigned int numscales=16;
 static unsigned int fsb;
 
-static struct mV_pos *vrm_mV_table;
-static unsigned char *mV_vrm_table;
+static const struct mV_pos *vrm_mV_table;
+static const unsigned char *mV_vrm_table;
 struct f_msr {
         u8 vrm;
         u8 pos;
@@ -821,7 +821,7 @@ static struct freq_attr* longhaul_attr[] = {
         NULL,
 };
 
-static struct cpufreq_driver longhaul_driver = {
+static const struct cpufreq_driver longhaul_driver = {
         .verify = longhaul_verify,
         .target = longhaul_target,
         .get    = longhaul_get,
diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.h b/arch/i386/kernel/cpu/cpufreq/longhaul.h
index bb0a04b1d1ab..102548f12842 100644
--- a/arch/i386/kernel/cpu/cpufreq/longhaul.h
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.h
@@ -56,7 +56,7 @@ union msr_longhaul {
 /*
  * VIA C3 Samuel 1  & Samuel 2 (stepping 0)
  */
-static int __initdata samuel1_clock_ratio[16] = {
+static const int __initdata samuel1_clock_ratio[16] = {
         -1, /* 0000 -> RESERVED */
         30, /* 0001 ->  3.0x */
         40, /* 0010 ->  4.0x */
@@ -75,7 +75,7 @@ static int __initdata samuel1_clock_ratio[16] = {
         -1, /* 1111 -> RESERVED */
 };
 
-static int __initdata samuel1_eblcr[16] = {
+static const int __initdata samuel1_eblcr[16] = {
         50, /* 0000 -> RESERVED */
         30, /* 0001 ->  3.0x */
         40, /* 0010 ->  4.0x */
@@ -97,7 +97,7 @@ static int __initdata samuel1_eblcr[16] = {
 /*
  * VIA C3 Samuel2 Stepping 1->15
  */
-static int __initdata samuel2_eblcr[16] = {
+static const int __initdata samuel2_eblcr[16] = {
         50,  /* 0000 ->  5.0x */
         30,  /* 0001 ->  3.0x */
         40,  /* 0010 ->  4.0x */
@@ -119,7 +119,7 @@ static int __initdata samuel2_eblcr[16] = {
 /*
  * VIA C3 Ezra
  */
-static int __initdata ezra_clock_ratio[16] = {
+static const int __initdata ezra_clock_ratio[16] = {
         100, /* 0000 -> 10.0x */
         30,  /* 0001 ->  3.0x */
         40,  /* 0010 ->  4.0x */
@@ -138,7 +138,7 @@ static int __initdata ezra_clock_ratio[16] = {
         120, /* 1111 -> 12.0x */
 };
 
-static int __initdata ezra_eblcr[16] = {
+static const int __initdata ezra_eblcr[16] = {
         50,  /* 0000 ->  5.0x */
         30,  /* 0001 ->  3.0x */
         40,  /* 0010 ->  4.0x */
@@ -160,7 +160,7 @@ static int __initdata ezra_eblcr[16] = {
 /*
  * VIA C3 (Ezra-T) [C5M].
  */
-static int __initdata ezrat_clock_ratio[32] = {
+static const int __initdata ezrat_clock_ratio[32] = {
         100, /* 0000 -> 10.0x */
         30,  /* 0001 ->  3.0x */
         40,  /* 0010 ->  4.0x */
@@ -196,7 +196,7 @@ static int __initdata ezrat_clock_ratio[32] = {
         -1,  /* 1111 -> RESERVED (12.0x) */
 };
 
-static int __initdata ezrat_eblcr[32] = {
+static const int __initdata ezrat_eblcr[32] = {
         50,  /* 0000 ->  5.0x */
         30,  /* 0001 ->  3.0x */
         40,  /* 0010 ->  4.0x */
@@ -235,7 +235,7 @@ static int __initdata ezrat_eblcr[32] = {
 /*
  * VIA C3 Nehemiah */
 
-static int __initdata  nehemiah_clock_ratio[32] = {
+static const int __initdata  nehemiah_clock_ratio[32] = {
         100, /* 0000 -> 10.0x */
         160, /* 0001 -> 16.0x */
         40,  /* 0010 ->  4.0x */
@@ -270,7 +270,7 @@ static int __initdata  nehemiah_clock_ratio[32] = {
         120, /* 1111 -> 12.0x */
 };
 
-static int __initdata nehemiah_eblcr[32] = {
+static const int __initdata nehemiah_eblcr[32] = {
         50,  /* 0000 ->  5.0x */
         160, /* 0001 -> 16.0x */
         40,  /* 0010 ->  4.0x */
@@ -315,7 +315,7 @@ struct mV_pos {
         unsigned short pos;
 };
 
-static struct mV_pos __initdata vrm85_mV[32] = {
+static const struct mV_pos __initdata vrm85_mV[32] = {
         {1250, 8},      {1200, 6},      {1150, 4},      {1100, 2},
         {1050, 0},      {1800, 30},     {1750, 28},     {1700, 26},
         {1650, 24},     {1600, 22},     {1550, 20},     {1500, 18},
@@ -326,14 +326,14 @@ static struct mV_pos __initdata vrm85_mV[32] = {
         {1475, 17},     {1425, 15},     {1375, 13},     {1325, 11}
 };
 
-static unsigned char __initdata mV_vrm85[32] = {
+static const unsigned char __initdata mV_vrm85[32] = {
         0x04,   0x14,   0x03,   0x13,   0x02,   0x12,   0x01,   0x11,
         0x00,   0x10,   0x0f,   0x1f,   0x0e,   0x1e,   0x0d,   0x1d,
         0x0c,   0x1c,   0x0b,   0x1b,   0x0a,   0x1a,   0x09,   0x19,
         0x08,   0x18,   0x07,   0x17,   0x06,   0x16,   0x05,   0x15
 };
 
-static struct mV_pos __initdata mobilevrm_mV[32] = {
+static const struct mV_pos __initdata mobilevrm_mV[32] = {
         {1750, 31},     {1700, 30},     {1650, 29},     {1600, 28},
         {1550, 27},     {1500, 26},     {1450, 25},     {1400, 24},
         {1350, 23},     {1300, 22},     {1250, 21},     {1200, 20},
@@ -344,7 +344,7 @@ static struct mV_pos __initdata mobilevrm_mV[32] = {
         {675, 3},       {650, 2},       {625, 1},       {600, 0}
 };
 
-static unsigned char __initdata mV_mobilevrm[32] = {
+static const unsigned char __initdata mV_mobilevrm[32] = {
         0x1f,   0x1e,   0x1d,   0x1c,   0x1b,   0x1a,   0x19,   0x18,
         0x17,   0x16,   0x15,   0x14,   0x13,   0x12,   0x11,   0x10,
         0x0f,   0x0e,   0x0d,   0x0c,   0x0b,   0x0a,   0x09,   0x08,
diff --git a/arch/i386/kernel/cpu/cpufreq/longrun.c b/arch/i386/kernel/cpu/cpufreq/longrun.c
index b2689514295a..e11fd86ce8fb 100644
--- a/arch/i386/kernel/cpu/cpufreq/longrun.c
+++ b/arch/i386/kernel/cpu/cpufreq/longrun.c
@@ -18,7 +18,7 @@
 
 #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "longrun", msg)
 
-static struct cpufreq_driver    longrun_driver;
+static const struct cpufreq_driver longrun_driver;
 
 /**
  * longrun_{low,high}_freq is needed for the conversion of cpufreq kHz
@@ -280,7 +280,7 @@ static int __init longrun_cpu_init(struct cpufreq_policy *policy)
 }
 
 
-static struct cpufreq_driver longrun_driver = {
+static const struct cpufreq_driver longrun_driver = {
         .flags          = CPUFREQ_CONST_LOOPS,
         .verify         = longrun_verify_policy,
         .setpolicy      = longrun_set_policy,
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k6.c b/arch/i386/kernel/cpu/cpufreq/powernow-k6.c
index f89524051e4a..2a0d89cb0b4b 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k6.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k6.c
@@ -195,7 +195,7 @@ static struct freq_attr* powernow_k6_attr[] = {
         NULL,
 };
 
-static struct cpufreq_driver powernow_k6_driver = {
+static const struct cpufreq_driver powernow_k6_driver = {
         .verify         = powernow_k6_verify,
         .target         = powernow_k6_target,
         .init           = powernow_k6_cpu_init,
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c b/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
index 54382760983a..d98529c93a1c 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
@@ -68,7 +68,7 @@ union powernow_acpi_control_t {
 
 #ifdef CONFIG_CPU_FREQ_DEBUG
 /* divide by 1000 to get VCore voltage in V. */
-static int mobile_vid_table[32] = {
+static const int mobile_vid_table[32] = {
     2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650,
     1600, 1550, 1500, 1450, 1400, 1350, 1300, 0,
     1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100,
@@ -77,7 +77,7 @@ static int mobile_vid_table[32] = {
 #endif
 
 /* divide by 10 to get FID. */
-static int fid_codes[32] = {
+static const int fid_codes[32] = {
     110, 115, 120, 125, 50, 55, 60, 65,
     70, 75, 80, 85, 90, 95, 100, 105,
     30, 190, 40, 200, 130, 135, 140, 210,
@@ -647,7 +647,7 @@ static struct freq_attr* powernow_table_attr[] = {
         NULL,
 };
 
-static struct cpufreq_driver powernow_driver = {
+static const struct cpufreq_driver powernow_driver = {
         .verify = powernow_verify,
         .target = powernow_target,
         .get    = powernow_get,
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
index fe3b67005ebb..8ed7b3af0553 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
@@ -1305,7 +1305,7 @@ static struct freq_attr* powernow_k8_attr[] = {
         NULL,
 };
 
-static struct cpufreq_driver cpufreq_amd64_driver = {
+static const struct cpufreq_driver cpufreq_amd64_driver = {
         .verify = powernowk8_verify,
         .target = powernowk8_target,
         .init = powernowk8_cpu_init,
diff --git a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
index b8fb4b521c62..eddbe04a0841 100644
--- a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
+++ b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
@@ -138,7 +138,7 @@ static struct freq_attr* sc520_freq_attr[] = {
 };
 
 
-static struct cpufreq_driver sc520_freq_driver = {
+static const struct cpufreq_driver sc520_freq_driver = {
         .get    = sc520_freq_get_cpu_frequency,
         .verify = sc520_freq_verify,
         .target = sc520_freq_target,
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
index b425cd3d1838..b94e347f08d3 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
@@ -374,7 +374,7 @@ static struct freq_attr* speedstep_attr[] = {
 };
 
 
-static struct cpufreq_driver speedstep_driver = {
+static const struct cpufreq_driver speedstep_driver = {
         .name   = "speedstep-ich",
         .verify = speedstep_verify,
         .target = speedstep_target,
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
index ff0d89806114..d4b7404bf315 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
@@ -332,7 +332,7 @@ static struct freq_attr* speedstep_attr[] = {
         NULL,
 };
 
-static struct cpufreq_driver speedstep_driver = {
+static const struct cpufreq_driver speedstep_driver = {
         .name           = "speedstep-smi",
         .verify         = speedstep_verify,
         .target         = speedstep_target,
diff --git a/arch/i386/lib/Makefile b/arch/i386/lib/Makefile
index d86a548b8d54..22d8ac5815f0 100644
--- a/arch/i386/lib/Makefile
+++ b/arch/i386/lib/Makefile
@@ -7,3 +7,5 @@ lib-y = checksum.o delay.o usercopy.o getuser.o putuser.o memcpy.o strstr.o \
         bitops.o semaphore.o
 
 lib-$(CONFIG_X86_USE_3DNOW) += mmx.o
+
+obj-$(CONFIG_SMP)       += msr-on-cpu.o
diff --git a/arch/i386/lib/msr-on-cpu.c b/arch/i386/lib/msr-on-cpu.c
new file mode 100644
index 000000000000..1c46bda409ff
--- /dev/null
+++ b/arch/i386/lib/msr-on-cpu.c
@@ -0,0 +1,58 @@
+#include <linux/module.h>
+#include <linux/preempt.h>
+#include <linux/smp.h>
+#include <asm/msr.h>
+
+struct msr_info {
+        u32 msr_no;
+        u32 l, h;
+};
+
+static void __rdmsr_on_cpu(void *info)
+{
+        struct msr_info *rv = info;
+
+        rdmsr(rv->msr_no, rv->l, rv->h);
+}
+
+void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
+{
+        preempt_disable();
+        if (smp_processor_id() == cpu)
+                rdmsr(msr_no, *l, *h);
+        else {
+                struct msr_info rv;
+
+                rv.msr_no = msr_no;
+                smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 0, 1);
+                *l = rv.l;
+                *h = rv.h;
+        }
+        preempt_enable();
+}
+
+static void __wrmsr_on_cpu(void *info)
+{
+        struct msr_info *rv = info;
+
+        wrmsr(rv->msr_no, rv->l, rv->h);
+}
+
+void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
+{
+        preempt_disable();
+        if (smp_processor_id() == cpu)
+                wrmsr(msr_no, l, h);
+        else {
+                struct msr_info rv;
+
+                rv.msr_no = msr_no;
+                rv.l = l;
+                rv.h = h;
+                smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 0, 1);
+        }
+        preempt_enable();
+}
+
+EXPORT_SYMBOL(rdmsr_on_cpu);
+EXPORT_SYMBOL(wrmsr_on_cpu);