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-rw-r--r--arch/x86/kernel/acpi/cstate.c3
-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c10
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k8.c15
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c12
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-ich.c3
-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c3
-rw-r--r--arch/x86/kernel/ldt.c6
-rw-r--r--arch/x86/kernel/microcode.c17
-rw-r--r--arch/x86/kernel/reboot.c11
-rw-r--r--arch/x86/kernel/setup_percpu.c21
-rw-r--r--drivers/acpi/processor_throttling.c11
-rw-r--r--drivers/firmware/dcdbas.c3
-rw-r--r--drivers/misc/sgi-xp/xpc_main.c3
-rw-r--r--include/linux/cpumask.h63
-rw-r--r--kernel/cpu.c25
-rw-r--r--kernel/time/tick-common.c8
-rw-r--r--kernel/trace/trace_sysprof.c4
-rw-r--r--lib/smp_processor_id.c5
-rw-r--r--net/sunrpc/svc.c3
19 files changed, 85 insertions, 141 deletions
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 9220cf46aa1..c2502eb9aa8 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 ff2fff56f0a..dd097b83583 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 53c7b693697..c45ca6d4dce 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 ca2ac13b7af..15e13c01cc3 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 2f3728dc24f..191f7263c61 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 650d40f7912..6b0a10b002f 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 3fee2aa50f3..b68e21f06f4 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 6994c751590..652fa5c38eb 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 06a9f643817..724adfc63cb 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 f7745f94c00..76e305e064f 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -80,24 +80,6 @@ static void __init setup_per_cpu_maps(void)
#endif
}
-#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 */
-static void __init setup_cpumask_of_cpu(void)
-{
- int i;
-
- /* alloc_bootmem zeroes memory */
- cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids);
- for (i = 0; i < nr_cpu_ids; i++)
- cpu_set(i, cpumask_of_cpu_map[i]);
-}
-#else
-static inline void setup_cpumask_of_cpu(void) { }
-#endif
-
#ifdef CONFIG_X86_32
/*
* Great future not-so-futuristic plan: make i386 and x86_64 do it
@@ -197,9 +179,6 @@ void __init setup_per_cpu_areas(void)
/* Setup node to cpumask map */
setup_node_to_cpumask_map();
-
- /* Setup cpumask_of_cpu map */
- setup_cpumask_of_cpu();
}
#endif
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index a2c3f9cfa54..a56fc6c4394 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 c66817e7717..50a071f1c94 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 579b01ff82d..c3b4227f48a 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 1b5c98e7fef..96d0509fb8d 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
@@ -273,37 +265,30 @@ static inline void __cpus_shift_left(cpumask_t *dstp,
bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
}
+/*
+ * Special-case data structure for "single bit set only" constant CPU masks.
+ *
+ * We pre-generate all the 64 (or 32) possible bit positions, with enough
+ * padding to the left and the right, and return the constant pointer
+ * appropriately offset.
+ */
+extern const unsigned long
+ cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
+
+static inline const cpumask_t *get_cpu_mask(unsigned int cpu)
+{
+ const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
+ p -= cpu / BITS_PER_LONG;
+ return (const cpumask_t *)p;
+}
+
+/*
+ * In cases where we take the address of the cpumask immediately,
+ * gcc optimizes it out (it's a constant) and there's no huge stack
+ * variable created:
+ */
+#define cpumask_of_cpu(cpu) ({ *get_cpu_mask(cpu); })
-#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
-extern 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 29510d68338..e202a68d1cc 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -455,3 +455,28 @@ out:
#endif /* CONFIG_PM_SLEEP_SMP */
#endif /* CONFIG_SMP */
+
+/*
+ * cpu_bit_bitmap[] is a special, "compressed" data structure that
+ * represents all NR_CPUS bits binary values of 1<<nr.
+ *
+ * It is used by cpumask_of_cpu() to get a constant address to a CPU
+ * mask value that has a single bit set only.
+ */
+
+/* cpu_bit_bitmap[0] is empty - so we can back into it */
+#define MASK_DECLARE_1(x) [x+1][0] = 1UL << (x)
+#define MASK_DECLARE_2(x) MASK_DECLARE_1(x), MASK_DECLARE_1(x+1)
+#define MASK_DECLARE_4(x) MASK_DECLARE_2(x), MASK_DECLARE_2(x+2)
+#define MASK_DECLARE_8(x) MASK_DECLARE_4(x), MASK_DECLARE_4(x+4)
+
+const unsigned long cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)] = {
+
+ MASK_DECLARE_8(0), MASK_DECLARE_8(8),
+ MASK_DECLARE_8(16), MASK_DECLARE_8(24),
+#if BITS_PER_LONG > 32
+ MASK_DECLARE_8(32), MASK_DECLARE_8(40),
+ MASK_DECLARE_8(48), MASK_DECLARE_8(56),
+#endif
+};
+EXPORT_SYMBOL_GPL(cpu_bit_bitmap);
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index bf43284d685..80c4336f418 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 ce2d723c10e..bb948e52ce2 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 c4381d9516f..0f8fc22ed10 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 835d2741308..5a32cb7c4bb 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:
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 01:49:41 +0000