[git pull] cpus4096 fixes

From: Ingo Molnar
Date: Sun Jul 27 2008 - 15:06:43 EST

Linus,

Please pull the latest cpus4096-fixes git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git cpus4096

this fixes the cpumask_of_cpu API fallout described here:

http://lkml.org/lkml/2008/7/23/76

... and the fix is wider than i'd like it to be, so close to -rc1 - but
it's the cleanest one and it has Rusty's ack as well. These changes have
been tested thoroughly on x86 in the past 2-3 days and caused no
problems. Mike cross-compiled them on a lot of architectures:

http://lkml.org/lkml/2008/7/24/483

or we could also delay it to after -rc1.

Thanks,

Ingo

------------------>
Ingo Molnar (1):
cpumask: export cpumask_of_cpu_map

Mike Travis (3):
cpumask: make cpumask_of_cpu_map generic
cpumask: put cpumask_of_cpu_map in the initdata section
cpumask: change cpumask_of_cpu_ptr to use new cpumask_of_cpu


arch/x86/kernel/acpi/cstate.c | 3 +-
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 10 +--
arch/x86/kernel/cpu/cpufreq/powernow-k8.c | 15 +--
arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c | 12 +--
arch/x86/kernel/cpu/cpufreq/speedstep-ich.c | 3 +-
arch/x86/kernel/cpu/intel_cacheinfo.c | 3 +-
arch/x86/kernel/ldt.c | 6 +-
arch/x86/kernel/microcode.c | 17 +---
arch/x86/kernel/reboot.c | 11 +--
arch/x86/kernel/setup_percpu.c | 10 +-
drivers/acpi/processor_throttling.c | 11 +--
drivers/firmware/dcdbas.c | 3 +-
drivers/misc/sgi-xp/xpc_main.c | 3 +-
include/linux/cpumask.h | 41 +-------
kernel/cpu.c | 113 ++++++++++++++++++++++
kernel/stop_machine.c | 3 +-
kernel/time/tick-common.c | 8 +-
kernel/trace/trace_sysprof.c | 4 +-
lib/smp_processor_id.c | 5 +-
net/sunrpc/svc.c | 3 +-
20 files changed, 159 insertions(+), 125 deletions(-)

diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 9220cf4..c2502eb 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -73,7 +73,6 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
struct cpuinfo_x86 *c = &cpu_data(cpu);

cpumask_t saved_mask;
- cpumask_of_cpu_ptr(new_mask, cpu);
int retval;
unsigned int eax, ebx, ecx, edx;
unsigned int edx_part;
@@ -92,7 +91,7 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,

/* Make sure we are running on right CPU */
saved_mask = current->cpus_allowed;
- retval = set_cpus_allowed_ptr(current, new_mask);
+ retval = set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
if (retval)
return -1;

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index ff2fff5..dd097b8 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -200,12 +200,10 @@ static void drv_read(struct drv_cmd *cmd)
static void drv_write(struct drv_cmd *cmd)
{
cpumask_t saved_mask = current->cpus_allowed;
- cpumask_of_cpu_ptr_declare(cpu_mask);
unsigned int i;

for_each_cpu_mask_nr(i, cmd->mask) {
- cpumask_of_cpu_ptr_next(cpu_mask, i);
- set_cpus_allowed_ptr(current, cpu_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(i));
do_drv_write(cmd);
}

@@ -269,12 +267,11 @@ static unsigned int get_measured_perf(unsigned int cpu)
} aperf_cur, mperf_cur;

cpumask_t saved_mask;
- cpumask_of_cpu_ptr(cpu_mask, cpu);
unsigned int perf_percent;
unsigned int retval;

saved_mask = current->cpus_allowed;
- set_cpus_allowed_ptr(current, cpu_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
if (get_cpu() != cpu) {
/* We were not able to run on requested processor */
put_cpu();
@@ -340,7 +337,6 @@ static unsigned int get_measured_perf(unsigned int cpu)

static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
{
- cpumask_of_cpu_ptr(cpu_mask, cpu);
struct acpi_cpufreq_data *data = per_cpu(drv_data, cpu);
unsigned int freq;
unsigned int cached_freq;
@@ -353,7 +349,7 @@ static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
}

cached_freq = data->freq_table[data->acpi_data->state].frequency;
- freq = extract_freq(get_cur_val(cpu_mask), data);
+ freq = extract_freq(get_cur_val(&cpumask_of_cpu(cpu)), data);
if (freq != cached_freq) {
/*
* The dreaded BIOS frequency change behind our back.
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 53c7b69..c45ca6d 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -479,12 +479,11 @@ static int core_voltage_post_transition(struct powernow_k8_data *data, u32 reqvi
static int check_supported_cpu(unsigned int cpu)
{
cpumask_t oldmask;
- cpumask_of_cpu_ptr(cpu_mask, cpu);
u32 eax, ebx, ecx, edx;
unsigned int rc = 0;

oldmask = current->cpus_allowed;
- set_cpus_allowed_ptr(current, cpu_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));

if (smp_processor_id() != cpu) {
printk(KERN_ERR PFX "limiting to cpu %u failed\n", cpu);
@@ -1017,7 +1016,6 @@ static int transition_frequency_pstate(struct powernow_k8_data *data, unsigned i
static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsigned relation)
{
cpumask_t oldmask;
- cpumask_of_cpu_ptr(cpu_mask, pol->cpu);
struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
u32 checkfid;
u32 checkvid;
@@ -1032,7 +1030,7 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi

/* only run on specific CPU from here on */
oldmask = current->cpus_allowed;
- set_cpus_allowed_ptr(current, cpu_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu));

if (smp_processor_id() != pol->cpu) {
printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
@@ -1107,7 +1105,6 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data;
cpumask_t oldmask;
- cpumask_of_cpu_ptr_declare(newmask);
int rc;

if (!cpu_online(pol->cpu))
@@ -1159,8 +1156,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)

/* only run on specific CPU from here on */
oldmask = current->cpus_allowed;
- cpumask_of_cpu_ptr_next(newmask, pol->cpu);
- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu));

if (smp_processor_id() != pol->cpu) {
printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
@@ -1182,7 +1178,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
set_cpus_allowed_ptr(current, &oldmask);

if (cpu_family == CPU_HW_PSTATE)
- pol->cpus = *newmask;
+ pol->cpus = cpumask_of_cpu(pol->cpu);
else
pol->cpus = per_cpu(cpu_core_map, pol->cpu);
data->available_cores = &(pol->cpus);
@@ -1248,7 +1244,6 @@ static unsigned int powernowk8_get (unsigned int cpu)
{
struct powernow_k8_data *data;
cpumask_t oldmask = current->cpus_allowed;
- cpumask_of_cpu_ptr(newmask, cpu);
unsigned int khz = 0;
unsigned int first;

@@ -1258,7 +1253,7 @@ static unsigned int powernowk8_get (unsigned int cpu)
if (!data)
return -EINVAL;

- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
if (smp_processor_id() != cpu) {
printk(KERN_ERR PFX
"limiting to CPU %d failed in powernowk8_get\n", cpu);
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index ca2ac13..15e13c0 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -324,10 +324,9 @@ static unsigned int get_cur_freq(unsigned int cpu)
unsigned l, h;
unsigned clock_freq;
cpumask_t saved_mask;
- cpumask_of_cpu_ptr(new_mask, cpu);

saved_mask = current->cpus_allowed;
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
if (smp_processor_id() != cpu)
return 0;

@@ -585,15 +584,12 @@ static int centrino_target (struct cpufreq_policy *policy,
* Best effort undo..
*/

- if (!cpus_empty(*covered_cpus)) {
- cpumask_of_cpu_ptr_declare(new_mask);
-
+ if (!cpus_empty(*covered_cpus))
for_each_cpu_mask_nr(j, *covered_cpus) {
- cpumask_of_cpu_ptr_next(new_mask, j);
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current,
+ &cpumask_of_cpu(j));
wrmsr(MSR_IA32_PERF_CTL, oldmsr, h);
}
- }

tmp = freqs.new;
freqs.new = freqs.old;
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index 2f3728d..191f726 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -244,8 +244,7 @@ static unsigned int _speedstep_get(const cpumask_t *cpus)

static unsigned int speedstep_get(unsigned int cpu)
{
- cpumask_of_cpu_ptr(newmask, cpu);
- return _speedstep_get(newmask);
+ return _speedstep_get(&cpumask_of_cpu(cpu));
}

/**
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 650d40f..6b0a10b 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -516,7 +516,6 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
unsigned long j;
int retval;
cpumask_t oldmask;
- cpumask_of_cpu_ptr(newmask, cpu);

if (num_cache_leaves == 0)
return -ENOENT;
@@ -527,7 +526,7 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
return -ENOMEM;

oldmask = current->cpus_allowed;
- retval = set_cpus_allowed_ptr(current, newmask);
+ retval = set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
if (retval)
goto out;

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3fee2aa..b68e21f 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -62,12 +62,10 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)

if (reload) {
#ifdef CONFIG_SMP
- cpumask_of_cpu_ptr_declare(mask);
-
preempt_disable();
load_LDT(pc);
- cpumask_of_cpu_ptr_next(mask, smp_processor_id());
- if (!cpus_equal(current->mm->cpu_vm_mask, *mask))
+ if (!cpus_equal(current->mm->cpu_vm_mask,
+ cpumask_of_cpu(smp_processor_id())))
smp_call_function(flush_ldt, current->mm, 1);
preempt_enable();
#else
diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c
index 6994c75..652fa5c 100644
--- a/arch/x86/kernel/microcode.c
+++ b/arch/x86/kernel/microcode.c
@@ -388,7 +388,6 @@ static int do_microcode_update (void)
void *new_mc = NULL;
int cpu;
cpumask_t old;
- cpumask_of_cpu_ptr_declare(newmask);

old = current->cpus_allowed;

@@ -405,8 +404,7 @@ static int do_microcode_update (void)

if (!uci->valid)
continue;
- cpumask_of_cpu_ptr_next(newmask, cpu);
- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
error = get_maching_microcode(new_mc, cpu);
if (error < 0)
goto out;
@@ -576,7 +574,6 @@ static int apply_microcode_check_cpu(int cpu)
struct cpuinfo_x86 *c = &cpu_data(cpu);
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
cpumask_t old;
- cpumask_of_cpu_ptr(newmask, cpu);
unsigned int val[2];
int err = 0;

@@ -585,7 +582,7 @@ static int apply_microcode_check_cpu(int cpu)
return 0;

old = current->cpus_allowed;
- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));

/* Check if the microcode we have in memory matches the CPU */
if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
@@ -623,12 +620,11 @@ static int apply_microcode_check_cpu(int cpu)
static void microcode_init_cpu(int cpu, int resume)
{
cpumask_t old;
- cpumask_of_cpu_ptr(newmask, cpu);
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;

old = current->cpus_allowed;

- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
mutex_lock(&microcode_mutex);
collect_cpu_info(cpu);
if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
@@ -661,13 +657,10 @@ static ssize_t reload_store(struct sys_device *dev,
if (end == buf)
return -EINVAL;
if (val == 1) {
- cpumask_t old;
- cpumask_of_cpu_ptr(newmask, cpu);
-
- old = current->cpus_allowed;
+ cpumask_t old = current->cpus_allowed;

get_online_cpus();
- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));

mutex_lock(&microcode_mutex);
if (uci->valid)
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 06a9f64..724adfc 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -414,25 +414,20 @@ void native_machine_shutdown(void)

/* The boot cpu is always logical cpu 0 */
int reboot_cpu_id = 0;
- cpumask_of_cpu_ptr(newmask, reboot_cpu_id);

#ifdef CONFIG_X86_32
/* See if there has been given a command line override */
if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
- cpu_online(reboot_cpu)) {
+ cpu_online(reboot_cpu))
reboot_cpu_id = reboot_cpu;
- cpumask_of_cpu_ptr_next(newmask, reboot_cpu_id);
- }
#endif

/* Make certain the cpu I'm about to reboot on is online */
- if (!cpu_online(reboot_cpu_id)) {
+ if (!cpu_online(reboot_cpu_id))
reboot_cpu_id = smp_processor_id();
- cpumask_of_cpu_ptr_next(newmask, reboot_cpu_id);
- }

/* Make certain I only run on the appropriate processor */
- set_cpus_allowed_ptr(current, newmask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(reboot_cpu_id));

/* O.K Now that I'm on the appropriate processor,
* stop all of the others.
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index f7745f9..1cd53df 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -81,10 +81,12 @@ static void __init setup_per_cpu_maps(void)
}

#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
-cpumask_t *cpumask_of_cpu_map __read_mostly;
-EXPORT_SYMBOL(cpumask_of_cpu_map);
-
-/* requires nr_cpu_ids to be initialized */
+/*
+ * Replace static cpumask_of_cpu_map in the initdata section,
+ * with one that's allocated sized by the possible number of cpus.
+ *
+ * (requires nr_cpu_ids to be initialized)
+ */
static void __init setup_cpumask_of_cpu(void)
{
int i;
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index a2c3f9c..a56fc6c 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -827,7 +827,6 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
static int acpi_processor_get_throttling(struct acpi_processor *pr)
{
cpumask_t saved_mask;
- cpumask_of_cpu_ptr_declare(new_mask);
int ret;

if (!pr)
@@ -839,8 +838,7 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr)
* Migrate task to the cpu pointed by pr.
*/
saved_mask = current->cpus_allowed;
- cpumask_of_cpu_ptr_next(new_mask, pr->id);
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(pr->id));
ret = pr->throttling.acpi_processor_get_throttling(pr);
/* restore the previous state */
set_cpus_allowed_ptr(current, &saved_mask);
@@ -989,7 +987,6 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
{
cpumask_t saved_mask;
- cpumask_of_cpu_ptr_declare(new_mask);
int ret = 0;
unsigned int i;
struct acpi_processor *match_pr;
@@ -1028,8 +1025,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
* it can be called only for the cpu pointed by pr.
*/
if (p_throttling->shared_type == DOMAIN_COORD_TYPE_SW_ANY) {
- cpumask_of_cpu_ptr_next(new_mask, pr->id);
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(pr->id));
ret = p_throttling->acpi_processor_set_throttling(pr,
t_state.target_state);
} else {
@@ -1060,8 +1056,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
continue;
}
t_state.cpu = i;
- cpumask_of_cpu_ptr_next(new_mask, i);
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(i));
ret = match_pr->throttling.
acpi_processor_set_throttling(
match_pr, t_state.target_state);
diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index c66817e..50a071f 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -245,7 +245,6 @@ static ssize_t host_control_on_shutdown_store(struct device *dev,
static int smi_request(struct smi_cmd *smi_cmd)
{
cpumask_t old_mask;
- cpumask_of_cpu_ptr(new_mask, 0);
int ret = 0;

if (smi_cmd->magic != SMI_CMD_MAGIC) {
@@ -256,7 +255,7 @@ static int smi_request(struct smi_cmd *smi_cmd)

/* SMI requires CPU 0 */
old_mask = current->cpus_allowed;
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(0));
if (smp_processor_id() != 0) {
dev_dbg(&dcdbas_pdev->dev, "%s: failed to get CPU 0\n",
__func__);
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index 579b01f..c3b4227 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -229,11 +229,10 @@ xpc_hb_checker(void *ignore)
int last_IRQ_count = 0;
int new_IRQ_count;
int force_IRQ = 0;
- cpumask_of_cpu_ptr(cpumask, XPC_HB_CHECK_CPU);

/* this thread was marked active by xpc_hb_init() */

- set_cpus_allowed_ptr(current, cpumask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(XPC_HB_CHECK_CPU));

/* set our heartbeating to other partitions into motion */
xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 1b5c98e..8fa3b6d 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -62,15 +62,7 @@
* int next_cpu_nr(cpu, mask) Next cpu past 'cpu', or nr_cpu_ids
*
* cpumask_t cpumask_of_cpu(cpu) Return cpumask with bit 'cpu' set
- *ifdef CONFIG_HAS_CPUMASK_OF_CPU
- * cpumask_of_cpu_ptr_declare(v) Declares cpumask_t *v
- * cpumask_of_cpu_ptr_next(v, cpu) Sets v = &cpumask_of_cpu_map[cpu]
- * cpumask_of_cpu_ptr(v, cpu) Combines above two operations
- *else
- * cpumask_of_cpu_ptr_declare(v) Declares cpumask_t _v and *v = &_v
- * cpumask_of_cpu_ptr_next(v, cpu) Sets _v = cpumask_of_cpu(cpu)
- * cpumask_of_cpu_ptr(v, cpu) Combines above two operations
- *endif
+ * (can be used as an lvalue)
* CPU_MASK_ALL Initializer - all bits set
* CPU_MASK_NONE Initializer - no bits set
* unsigned long *cpus_addr(mask) Array of unsigned long's in mask
@@ -274,36 +266,9 @@ static inline void __cpus_shift_left(cpumask_t *dstp,
}


-#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
-extern cpumask_t *cpumask_of_cpu_map;
+/* cpumask_of_cpu_map[] is in kernel/cpu.c */
+extern const cpumask_t *cpumask_of_cpu_map;
#define cpumask_of_cpu(cpu) (cpumask_of_cpu_map[cpu])
-#define cpumask_of_cpu_ptr(v, cpu) \
- const cpumask_t *v = &cpumask_of_cpu(cpu)
-#define cpumask_of_cpu_ptr_declare(v) \
- const cpumask_t *v
-#define cpumask_of_cpu_ptr_next(v, cpu) \
- v = &cpumask_of_cpu(cpu)
-#else
-#define cpumask_of_cpu(cpu) \
-({ \
- typeof(_unused_cpumask_arg_) m; \
- if (sizeof(m) == sizeof(unsigned long)) { \
- m.bits[0] = 1UL<<(cpu); \
- } else { \
- cpus_clear(m); \
- cpu_set((cpu), m); \
- } \
- m; \
-})
-#define cpumask_of_cpu_ptr(v, cpu) \
- cpumask_t _##v = cpumask_of_cpu(cpu); \
- const cpumask_t *v = &_##v
-#define cpumask_of_cpu_ptr_declare(v) \
- cpumask_t _##v; \
- const cpumask_t *v = &_##v
-#define cpumask_of_cpu_ptr_next(v, cpu) \
- _##v = cpumask_of_cpu(cpu)
-#endif

#define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 10ba5f1..a35d899 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -461,3 +461,116 @@ out:
#endif /* CONFIG_PM_SLEEP_SMP */

#endif /* CONFIG_SMP */
+
+/* 64 bits of zeros, for initializers. */
+#if BITS_PER_LONG == 32
+#define Z64 0, 0
+#else
+#define Z64 0
+#endif
+
+/* Initializer macros. */
+#define CMI0(n) { .bits = { 1UL << (n) } }
+#define CMI(n, ...) { .bits = { __VA_ARGS__, 1UL << ((n) % BITS_PER_LONG) } }
+
+#define CMI8(n, ...) \
+ CMI((n), __VA_ARGS__), CMI((n)+1, __VA_ARGS__), \
+ CMI((n)+2, __VA_ARGS__), CMI((n)+3, __VA_ARGS__), \
+ CMI((n)+4, __VA_ARGS__), CMI((n)+5, __VA_ARGS__), \
+ CMI((n)+6, __VA_ARGS__), CMI((n)+7, __VA_ARGS__)
+
+#if BITS_PER_LONG == 32
+#define CMI64(n, ...) \
+ CMI8((n), __VA_ARGS__), CMI8((n)+8, __VA_ARGS__), \
+ CMI8((n)+16, __VA_ARGS__), CMI8((n)+24, __VA_ARGS__), \
+ CMI8((n)+32, 0, __VA_ARGS__), CMI8((n)+40, 0, __VA_ARGS__), \
+ CMI8((n)+48, 0, __VA_ARGS__), CMI8((n)+56, 0, __VA_ARGS__)
+#else
+#define CMI64(n, ...) \
+ CMI8((n), __VA_ARGS__), CMI8((n)+8, __VA_ARGS__), \
+ CMI8((n)+16, __VA_ARGS__), CMI8((n)+24, __VA_ARGS__), \
+ CMI8((n)+32, __VA_ARGS__), CMI8((n)+40, __VA_ARGS__), \
+ CMI8((n)+48, __VA_ARGS__), CMI8((n)+56, __VA_ARGS__)
+#endif
+
+#define CMI256(n, ...) \
+ CMI64((n), __VA_ARGS__), CMI64((n)+64, Z64, __VA_ARGS__), \
+ CMI64((n)+128, Z64, Z64, __VA_ARGS__), \
+ CMI64((n)+192, Z64, Z64, Z64, __VA_ARGS__)
+#define Z256 Z64, Z64, Z64, Z64
+
+#define CMI1024(n, ...) \
+ CMI256((n), __VA_ARGS__), \
+ CMI256((n)+256, Z256, __VA_ARGS__), \
+ CMI256((n)+512, Z256, Z256, __VA_ARGS__), \
+ CMI256((n)+768, Z256, Z256, Z256, __VA_ARGS__)
+#define Z1024 Z256, Z256, Z256, Z256
+
+/* We want this statically initialized, just to be safe. We try not
+ * to waste too much space, either. */
+static const cpumask_t cpumask_map[]
+#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
+__initdata
+#endif
+= {
+ CMI0(0), CMI0(1), CMI0(2), CMI0(3),
+#if NR_CPUS > 4
+ CMI0(4), CMI0(5), CMI0(6), CMI0(7),
+#endif
+#if NR_CPUS > 8
+ CMI0(8), CMI0(9), CMI0(10), CMI0(11),
+ CMI0(12), CMI0(13), CMI0(14), CMI0(15),
+#endif
+#if NR_CPUS > 16
+ CMI0(16), CMI0(17), CMI0(18), CMI0(19),
+ CMI0(20), CMI0(21), CMI0(22), CMI0(23),
+ CMI0(24), CMI0(25), CMI0(26), CMI0(27),
+ CMI0(28), CMI0(29), CMI0(30), CMI0(31),
+#endif
+#if NR_CPUS > 32
+#if BITS_PER_LONG == 32
+ CMI(32, 0), CMI(33, 0), CMI(34, 0), CMI(35, 0),
+ CMI(36, 0), CMI(37, 0), CMI(38, 0), CMI(39, 0),
+ CMI(40, 0), CMI(41, 0), CMI(42, 0), CMI(43, 0),
+ CMI(44, 0), CMI(45, 0), CMI(46, 0), CMI(47, 0),
+ CMI(48, 0), CMI(49, 0), CMI(50, 0), CMI(51, 0),
+ CMI(52, 0), CMI(53, 0), CMI(54, 0), CMI(55, 0),
+ CMI(56, 0), CMI(57, 0), CMI(58, 0), CMI(59, 0),
+ CMI(60, 0), CMI(61, 0), CMI(62, 0), CMI(63, 0),
+#else
+ CMI0(32), CMI0(33), CMI0(34), CMI0(35),
+ CMI0(36), CMI0(37), CMI0(38), CMI0(39),
+ CMI0(40), CMI0(41), CMI0(42), CMI0(43),
+ CMI0(44), CMI0(45), CMI0(46), CMI0(47),
+ CMI0(48), CMI0(49), CMI0(50), CMI0(51),
+ CMI0(52), CMI0(53), CMI0(54), CMI0(55),
+ CMI0(56), CMI0(57), CMI0(58), CMI0(59),
+ CMI0(60), CMI0(61), CMI0(62), CMI0(63),
+#endif /* BITS_PER_LONG == 64 */
+#endif
+#if NR_CPUS > 64
+ CMI64(64, Z64),
+#endif
+#if NR_CPUS > 128
+ CMI64(128, Z64, Z64), CMI64(192, Z64, Z64, Z64),
+#endif
+#if NR_CPUS > 256
+ CMI256(256, Z256),
+#endif
+#if NR_CPUS > 512
+ CMI256(512, Z256, Z256), CMI256(768, Z256, Z256, Z256),
+#endif
+#if NR_CPUS > 1024
+ CMI1024(1024, Z1024),
+#endif
+#if NR_CPUS > 2048
+ CMI1024(2048, Z1024, Z1024), CMI1024(3072, Z1024, Z1024, Z1024),
+#endif
+#if NR_CPUS > 4096
+#error NR_CPUS too big. Fix initializers or set CONFIG_HAVE_CPUMASK_OF_CPU_MAP
+#endif
+};
+
+const cpumask_t *cpumask_of_cpu_map = cpumask_map;
+
+EXPORT_SYMBOL_GPL(cpumask_of_cpu_map);
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 738b411..ba9b205 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -33,9 +33,8 @@ static int stopmachine(void *cpu)
{
int irqs_disabled = 0;
int prepared = 0;
- cpumask_of_cpu_ptr(cpumask, (int)(long)cpu);

- set_cpus_allowed_ptr(current, cpumask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu((int)(long)cpu));

/* Ack: we are alive */
smp_mb(); /* Theoretically the ack = 0 might not be on this CPU yet. */
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index bf43284..80c4336 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -196,12 +196,10 @@ static int tick_check_new_device(struct clock_event_device *newdev)
struct tick_device *td;
int cpu, ret = NOTIFY_OK;
unsigned long flags;
- cpumask_of_cpu_ptr_declare(cpumask);

spin_lock_irqsave(&tick_device_lock, flags);

cpu = smp_processor_id();
- cpumask_of_cpu_ptr_next(cpumask, cpu);
if (!cpu_isset(cpu, newdev->cpumask))
goto out_bc;

@@ -209,7 +207,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
curdev = td->evtdev;

/* cpu local device ? */
- if (!cpus_equal(newdev->cpumask, *cpumask)) {
+ if (!cpus_equal(newdev->cpumask, cpumask_of_cpu(cpu))) {

/*
* If the cpu affinity of the device interrupt can not
@@ -222,7 +220,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
* If we have a cpu local device already, do not replace it
* by a non cpu local device
*/
- if (curdev && cpus_equal(curdev->cpumask, *cpumask))
+ if (curdev && cpus_equal(curdev->cpumask, cpumask_of_cpu(cpu)))
goto out_bc;
}

@@ -254,7 +252,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
curdev = NULL;
}
clockevents_exchange_device(curdev, newdev);
- tick_setup_device(td, newdev, cpu, cpumask);
+ tick_setup_device(td, newdev, cpu, &cpumask_of_cpu(cpu));
if (newdev->features & CLOCK_EVT_FEAT_ONESHOT)
tick_oneshot_notify();

diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c
index ce2d723..bb948e5 100644
--- a/kernel/trace/trace_sysprof.c
+++ b/kernel/trace/trace_sysprof.c
@@ -213,9 +213,7 @@ static void start_stack_timers(void)
int cpu;

for_each_online_cpu(cpu) {
- cpumask_of_cpu_ptr(new_mask, cpu);
-
- set_cpus_allowed_ptr(current, new_mask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
start_stack_timer(cpu);
}
set_cpus_allowed_ptr(current, &saved_mask);
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index c4381d9..0f8fc22 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -11,7 +11,6 @@ notrace unsigned int debug_smp_processor_id(void)
{
unsigned long preempt_count = preempt_count();
int this_cpu = raw_smp_processor_id();
- cpumask_of_cpu_ptr_declare(this_mask);

if (likely(preempt_count))
goto out;
@@ -23,9 +22,7 @@ notrace unsigned int debug_smp_processor_id(void)
* Kernel threads bound to a single CPU can safely use
* smp_processor_id():
*/
- cpumask_of_cpu_ptr_next(this_mask, this_cpu);
-
- if (cpus_equal(current->cpus_allowed, *this_mask))
+ if (cpus_equal(current->cpus_allowed, cpumask_of_cpu(this_cpu)))
goto out;

/*
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 835d274..5a32cb7 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -310,8 +310,7 @@ svc_pool_map_set_cpumask(struct task_struct *task, unsigned int pidx)
switch (m->mode) {
case SVC_POOL_PERCPU:
{
- cpumask_of_cpu_ptr(cpumask, node);
- set_cpus_allowed_ptr(task, cpumask);
+ set_cpus_allowed_ptr(task, &cpumask_of_cpu(node));
break;
}
case SVC_POOL_PERNODE:
--
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