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linux-sg2042
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[PATCH] more for_each_cpu() conversions 

When we stop allocating percpu memory for not-possible CPUs we must not touch
the percpu data for not-possible CPUs at all.  The correct way of doing this
is to test cpu_possible() or to use for_each_cpu().

This patch is a kernel-wide sweep of all instances of NR_CPUS.  I found very
few instances of this bug, if any.  But the patch converts lots of open-coded
test to use the preferred helper macros.

Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Kyle McMartin <kyle@parisc-linux.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Christian Zankel <chris@zankel.net>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Jens Axboe <axboe@suse.de>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton 2006-03-23 03:01:05 -08:00 committed by Linus Torvalds
parent 63872f87a1
commit 394e3902c5
42 changed files with 137 additions and 222 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/cris/kernel/irq.c
View File

@ -52,9 +52,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_printf(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
@ -67,9 +66,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].handler->typename);
seq_printf(p, " %s", action->name);

10
arch/frv/kernel/irq.c
View File

@ -75,9 +75,8 @@ int show_interrupts(struct seq_file *p, void *v)
switch (i) {
case 0:
seq_printf(p, " ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
break;
@ -100,9 +99,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i - 1]);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i - 1]);
#endif
level = group->sources[ix]->level - frv_irq_levels;

4
arch/i386/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -1145,9 +1145,7 @@ static int __cpuinit powernowk8_init(void)
{
unsigned int i, supported_cpus = 0;
for (i=0; i<NR_CPUS; i++) {
if (!cpu_online(i))
continue;
for_each_cpu(i) {
if (check_supported_cpu(i))
supported_cpus++;
}

22
arch/i386/kernel/io_apic.c
View File

@ -351,8 +351,8 @@ static inline void rotate_irqs_among_cpus(unsigned long useful_load_threshold)
{
int i, j;
Dprintk("Rotating IRQs among CPUs.\n");
for (i = 0; i < NR_CPUS; i++) {
for (j = 0; cpu_online(i) && (j < NR_IRQS); j++) {
for_each_online_cpu(i) {
for (j = 0; j < NR_IRQS; j++) {
if (!irq_desc[j].action)
continue;
/* Is it a significant load ? */
@ -381,7 +381,7 @@ static void do_irq_balance(void)
unsigned long imbalance = 0;
cpumask_t allowed_mask, target_cpu_mask, tmp;
for (i = 0; i < NR_CPUS; i++) {
for_each_cpu(i) {
int package_index;
CPU_IRQ(i) = 0;
if (!cpu_online(i))
@ -422,9 +422,7 @@ static void do_irq_balance(void)
}
}
/* Find the least loaded processor package */
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (i != CPU_TO_PACKAGEINDEX(i))
continue;
if (min_cpu_irq > CPU_IRQ(i)) {
@ -441,9 +439,7 @@ tryanothercpu:
*/
tmp_cpu_irq = 0;
tmp_loaded = -1;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (i != CPU_TO_PACKAGEINDEX(i))
continue;
if (max_cpu_irq <= CPU_IRQ(i))
@ -619,9 +615,7 @@ static int __init balanced_irq_init(void)
if (smp_num_siblings > 1 && !cpus_empty(tmp))
physical_balance = 1;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
irq_cpu_data[i].irq_delta = kmalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
irq_cpu_data[i].last_irq = kmalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
if (irq_cpu_data[i].irq_delta == NULL || irq_cpu_data[i].last_irq == NULL) {
@ -638,9 +632,11 @@ static int __init balanced_irq_init(void)
else
printk(KERN_ERR "balanced_irq_init: failed to spawn balanced_irq");
failed:
for (i = 0; i < NR_CPUS; i++) {
for_each_cpu(i) {
kfree(irq_cpu_data[i].irq_delta);
irq_cpu_data[i].irq_delta = NULL;
kfree(irq_cpu_data[i].last_irq);
irq_cpu_data[i].last_irq = NULL;
}
return 0;
}

4
arch/i386/kernel/nmi.c
View File

@ -143,7 +143,7 @@ static int __init check_nmi_watchdog(void)
local_irq_enable();
mdelay((10*1000)/nmi_hz); // wait 10 ticks
for (cpu = 0; cpu < NR_CPUS; cpu++) {
for_each_cpu(cpu) {
#ifdef CONFIG_SMP
/* Check cpu_callin_map here because that is set
after the timer is started. */
@ -510,7 +510,7 @@ void touch_nmi_watchdog (void)
* Just reset the alert counters, (other CPUs might be
* spinning on locks we hold):
*/
for (i = 0; i < NR_CPUS; i++)
for_each_cpu(i)
alert_counter[i] = 0;
/*

7
arch/i386/oprofile/nmi_int.c
View File

@ -122,7 +122,7 @@ static void nmi_save_registers(void * dummy)
static void free_msrs(void)
{
int i;
for (i = 0; i < NR_CPUS; ++i) {
for_each_cpu(i) {
kfree(cpu_msrs[i].counters);
cpu_msrs[i].counters = NULL;
kfree(cpu_msrs[i].controls);
@ -138,10 +138,7 @@ static int allocate_msrs(void)
size_t counters_size = sizeof(struct op_msr) * model->num_counters;
int i;
for (i = 0; i < NR_CPUS; ++i) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
cpu_msrs[i].counters = kmalloc(counters_size, GFP_KERNEL);
if (!cpu_msrs[i].counters) {
success = 0;

10
arch/m32r/kernel/irq.c
View File

@ -37,9 +37,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_printf(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
@ -52,9 +51,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].handler->typename);
seq_printf(p, " %s", action->name);

10
arch/mips/kernel/irq.c
View File

@ -68,9 +68,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_printf(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
@ -83,9 +82,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].handler->typename);
seq_printf(p, " %s", action->name);

4
arch/mips/kernel/smp.c
View File

@ -167,8 +167,8 @@ int smp_call_function (void (*func) (void *info), void *info, int retry,
mb();
/* Send a message to all other CPUs and wait for them to respond */
for (i = 0; i < NR_CPUS; i++)
if (cpu_online(i) && i != cpu)
for_each_online_cpu(i)
if (i != cpu)
core_send_ipi(i, SMP_CALL_FUNCTION);
/* Wait for response */

5
arch/mips/sgi-ip27/ip27-irq.c
View File

@ -88,12 +88,9 @@ static inline int find_level(cpuid_t *cpunum, int irq)
{
int cpu, i;
for (cpu = 0; cpu <= NR_CPUS; cpu++) {
for_each_online_cpu(cpu) {
struct slice_data *si = cpu_data[cpu].data;
if (!cpu_online(cpu))
continue;
for (i = BASE_PCI_IRQ; i < LEVELS_PER_SLICE; i++)
if (si->level_to_irq[i] == irq) {
*cpunum = cpu;

25
arch/parisc/kernel/smp.c
View File

@ -298,8 +298,8 @@ send_IPI_allbutself(enum ipi_message_type op)
{
int i;
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i) && i != smp_processor_id())
for_each_online_cpu(i) {
if (i != smp_processor_id())
send_IPI_single(i, op);
}
}
@ -643,14 +643,13 @@ int sys_cpus(int argc, char **argv)
if ( argc == 1 ){
#ifdef DUMP_MORE_STATE
for(i=0; i<NR_CPUS; i++) {
for_each_online_cpu(i) {
int cpus_per_line = 4;
if(cpu_online(i)) {
if (j++ % cpus_per_line)
printk(" %3d",i);
else
printk("\n %3d",i);
}
if (j++ % cpus_per_line)
printk(" %3d",i);
else
printk("\n %3d",i);
}
printk("\n");
#else
@ -659,9 +658,7 @@ int sys_cpus(int argc, char **argv)
} else if((argc==2) && !(strcmp(argv[1],"-l"))) {
printk("\nCPUSTATE TASK CPUNUM CPUID HARDCPU(HPA)\n");
#ifdef DUMP_MORE_STATE
for(i=0;i<NR_CPUS;i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (cpu_data[i].cpuid != NO_PROC_ID) {
switch(cpu_data[i].state) {
case STATE_RENDEZVOUS:
@ -695,9 +692,7 @@ int sys_cpus(int argc, char **argv)
} else if ((argc==2) && !(strcmp(argv[1],"-s"))) {
#ifdef DUMP_MORE_STATE
printk("\nCPUSTATE CPUID\n");
for (i=0;i<NR_CPUS;i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (cpu_data[i].cpuid != NO_PROC_ID) {
switch(cpu_data[i].state) {
case STATE_RENDEZVOUS:

5
arch/powerpc/kernel/irq.c
View File

@ -135,9 +135,8 @@ skip:
#ifdef CONFIG_TAU_INT
if (tau_initialized){
seq_puts(p, "TAU: ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", tau_interrupts(j));
for_each_online_cpu(j)
seq_printf(p, "%10u ", tau_interrupts(j));
seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
}
#endif

5
arch/powerpc/kernel/setup-common.c
View File

@ -162,9 +162,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
unsigned long bogosum = 0;
int i;
for (i = 0; i < NR_CPUS; ++i)
if (cpu_online(i))
bogosum += loops_per_jiffy;
for_each_online_cpu(i)
bogosum += loops_per_jiffy;
seq_printf(m, "total bogomips\t: %lu.%02lu\n",
bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
#endif /* CONFIG_SMP && CONFIG_PPC32 */

5
arch/powerpc/kernel/setup_32.c
View File

@ -272,9 +272,8 @@ int __init ppc_init(void)
if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
/* register CPU devices */
for (i = 0; i < NR_CPUS; i++)
if (cpu_possible(i))
register_cpu(&cpu_devices[i], i, NULL);
for_each_cpu(i)
register_cpu(&cpu_devices[i], i, NULL);
/* call platform init */
if (ppc_md.init != NULL) {

4
arch/powerpc/platforms/powermac/smp.c
View File

@ -191,9 +191,7 @@ static void smp_psurge_message_pass(int target, int msg)
if (num_online_cpus() < 2)
return;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (target == MSG_ALL
|| (target == MSG_ALL_BUT_SELF && i != smp_processor_id())
|| target == i) {

10
arch/ppc/kernel/setup.c
View File

@ -168,9 +168,8 @@ int show_cpuinfo(struct seq_file *m, void *v)
/* Show summary information */
#ifdef CONFIG_SMP
unsigned long bogosum = 0;
for (i = 0; i < NR_CPUS; ++i)
if (cpu_online(i))
bogosum += cpu_data[i].loops_per_jiffy;
for_each_online_cpu(i)
bogosum += cpu_data[i].loops_per_jiffy;
seq_printf(m, "total bogomips\t: %lu.%02lu\n",
bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
#endif /* CONFIG_SMP */
@ -712,9 +711,8 @@ int __init ppc_init(void)
if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
/* register CPU devices */
for (i = 0; i < NR_CPUS; i++)
if (cpu_possible(i))
register_cpu(&cpu_devices[i], i, NULL);
for_each_cpu(i)
register_cpu(&cpu_devices[i], i, NULL);
/* call platform init */
if (ppc_md.init != NULL) {

4
arch/s390/kernel/smp.c
View File

@ -799,9 +799,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
*/
print_cpu_info(&S390_lowcore.cpu_data);
for(i = 0; i < NR_CPUS; i++) {
if (!cpu_possible(i))
continue;
for_each_cpu(i) {
lowcore_ptr[i] = (struct _lowcore *)
__get_free_pages(GFP_KERNEL|GFP_DMA,
sizeof(void*) == 8 ? 1 : 0);

5
arch/sh/kernel/irq.c
View File

@ -35,9 +35,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_puts(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}

5
arch/sh/kernel/setup.c
View File

@ -404,9 +404,8 @@ static int __init topology_init(void)
{
int cpu_id;
for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
if (cpu_possible(cpu_id))
register_cpu(&cpu[cpu_id], cpu_id, NULL);
for_each_cpu(cpu_id)
register_cpu(&cpu[cpu_id], cpu_id, NULL);
return 0;
}

5
arch/sh64/kernel/irq.c
View File

@ -53,9 +53,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_puts(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}

5
arch/sparc/kernel/irq.c
View File

@ -184,9 +184,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++) {
if (cpu_online(j))
seq_printf(p, "%10u ",
for_each_online_cpu(j) {
seq_printf(p, "%10u ",
kstat_cpu(cpu_logical_map(j)).irqs[i]);
}
#endif

24
arch/sparc/kernel/smp.c
View File

@ -243,9 +243,8 @@ int setup_profiling_timer(unsigned int multiplier)
return -EINVAL;
spin_lock_irqsave(&prof_setup_lock, flags);
for(i = 0; i < NR_CPUS; i++) {
if (cpu_possible(i))
load_profile_irq(i, lvl14_resolution / multiplier);
for_each_cpu(i) {
load_profile_irq(i, lvl14_resolution / multiplier);
prof_multiplier(i) = multiplier;
}
spin_unlock_irqrestore(&prof_setup_lock, flags);
@ -273,13 +272,12 @@ void smp_bogo(struct seq_file *m)
{
int i;
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
seq_printf(m,
"Cpu%dBogo\t: %lu.%02lu\n",
i,
cpu_data(i).udelay_val/(500000/HZ),
(cpu_data(i).udelay_val/(5000/HZ))%100);
for_each_online_cpu(i) {
seq_printf(m,
"Cpu%dBogo\t: %lu.%02lu\n",
i,
cpu_data(i).udelay_val/(500000/HZ),
(cpu_data(i).udelay_val/(5000/HZ))%100);
}
}
@ -288,8 +286,6 @@ void smp_info(struct seq_file *m)
int i;
seq_printf(m, "State:\n");
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
seq_printf(m, "CPU%d\t\t: online\n", i);
}
for_each_online_cpu(i)
seq_printf(m, "CPU%d\t\t: online\n", i);
}

8
arch/sparc/kernel/sun4d_irq.c
View File

@ -103,11 +103,9 @@ found_it: seq_printf(p, "%3d: ", i);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (x = 0; x < NR_CPUS; x++) {
if (cpu_online(x))
seq_printf(p, "%10u ",
kstat_cpu(cpu_logical_map(x)).irqs[i]);
}
for_each_online_cpu(x)
seq_printf(p, "%10u ",
kstat_cpu(cpu_logical_map(x)).irqs[i]);
#endif
seq_printf(p, "%c %s",
(action->flags & SA_INTERRUPT) ? '+' : ' ',

8
arch/sparc/kernel/sun4d_smp.c
View File

@ -249,11 +249,9 @@ void __init smp4d_boot_cpus(void)
} else {
unsigned long bogosum = 0;
for(i = 0; i < NR_CPUS; i++) {
if (cpu_isset(i, cpu_present_map)) {
bogosum += cpu_data(i).udelay_val;
smp_highest_cpu = i;
}
for_each_present_cpu(i) {
bogosum += cpu_data(i).udelay_val;
smp_highest_cpu = i;
}
SMP_PRINTK(("Total of %d Processors activated (%lu.%02lu BogoMIPS).\n", cpucount + 1, bogosum/(500000/HZ), (bogosum/(5000/HZ))%100));
printk("Total of %d Processors activated (%lu.%02lu BogoMIPS).\n",

6
arch/sparc/kernel/sun4m_smp.c
View File

@ -218,10 +218,8 @@ void __init smp4m_boot_cpus(void)
cpu_present_map = cpumask_of_cpu(smp_processor_id());
} else {
unsigned long bogosum = 0;
for(i = 0; i < NR_CPUS; i++) {
if (cpu_isset(i, cpu_present_map))
bogosum += cpu_data(i).udelay_val;
}
for_each_present_cpu(i)
bogosum += cpu_data(i).udelay_val;
printk("Total of %d Processors activated (%lu.%02lu BogoMIPS).\n",
cpucount + 1,
bogosum/(500000/HZ),

4
arch/sparc64/kernel/irq.c
View File

@ -117,9 +117,7 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++) {
if (!cpu_online(j))
continue;
for_each_online_cpu(j) {
seq_printf(p, "%10u ",
kstat_cpu(j).irqs[i]);
}

30
arch/sparc64/kernel/smp.c
View File

@ -57,25 +57,21 @@ void smp_info(struct seq_file *m)
int i;
seq_printf(m, "State:\n");
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
seq_printf(m,
"CPU%d:\t\tonline\n", i);
}
for_each_online_cpu(i)
seq_printf(m, "CPU%d:\t\tonline\n", i);
}
void smp_bogo(struct seq_file *m)
{
int i;
for (i = 0; i < NR_CPUS; i++)
if (cpu_online(i))
seq_printf(m,
"Cpu%dBogo\t: %lu.%02lu\n"
"Cpu%dClkTck\t: %016lx\n",
i, cpu_data(i).udelay_val / (500000/HZ),
(cpu_data(i).udelay_val / (5000/HZ)) % 100,
i, cpu_data(i).clock_tick);
for_each_online_cpu(i)
seq_printf(m,
"Cpu%dBogo\t: %lu.%02lu\n"
"Cpu%dClkTck\t: %016lx\n",
i, cpu_data(i).udelay_val / (500000/HZ),
(cpu_data(i).udelay_val / (5000/HZ)) % 100,
i, cpu_data(i).clock_tick);
}
void __init smp_store_cpu_info(int id)
@ -1282,7 +1278,7 @@ int setup_profiling_timer(unsigned int multiplier)
return -EINVAL;
spin_lock_irqsave(&prof_setup_lock, flags);
for (i = 0; i < NR_CPUS; i++)
for_each_cpu(i)
prof_multiplier(i) = multiplier;
current_tick_offset = (timer_tick_offset / multiplier);
spin_unlock_irqrestore(&prof_setup_lock, flags);
@ -1384,10 +1380,8 @@ void __init smp_cpus_done(unsigned int max_cpus)
unsigned long bogosum = 0;
int i;
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
bogosum += cpu_data(i).udelay_val;
}
for_each_online_cpu(i)
bogosum += cpu_data(i).udelay_val;
printk("Total of %ld processors activated "
"(%lu.%02lu BogoMIPS).\n",
(long) num_online_cpus(),

21
arch/x86_64/kernel/irq.c
View File

@ -38,9 +38,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_printf(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
@ -53,10 +52,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ",
kstat_cpu(j).irqs[i]);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].handler->typename);
@ -68,15 +65,13 @@ skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
seq_printf(p, "NMI: ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
seq_putc(p, '\n');
#ifdef CONFIG_X86_LOCAL_APIC
seq_printf(p, "LOC: ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
seq_putc(p, '\n');
#endif
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));

4
arch/x86_64/kernel/nmi.c
View File

@ -162,9 +162,7 @@ int __init check_nmi_watchdog (void)
local_irq_enable();
mdelay((10*1000)/nmi_hz); // wait 10 ticks
for (cpu = 0; cpu < NR_CPUS; cpu++) {
if (!cpu_online(cpu))
continue;
for_each_online_cpu(cpu) {
if (cpu_pda(cpu)->__nmi_count - counts[cpu] <= 5) {
endflag = 1;
printk("CPU#%d: NMI appears to be stuck (%d->%d)!\n",

15
arch/xtensa/kernel/irq.c
View File

@ -83,9 +83,8 @@ int show_interrupts(struct seq_file *p, void *v)
if (i == 0) {
seq_printf(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ",j);
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
@ -98,9 +97,8 @@ int show_interrupts(struct seq_file *p, void *v)
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].handler->typename);
seq_printf(p, " %s", action->name);
@ -113,9 +111,8 @@ skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
seq_printf(p, "NMI: ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", nmi_count(j));
for_each_online_cpu(j)
seq_printf(p, "%10u ", nmi_count(j));
seq_putc(p, '\n');
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
}

4
drivers/net/loopback.c
View File

@ -172,11 +172,9 @@ static struct net_device_stats *get_stats(struct net_device *dev)
memset(stats, 0, sizeof(struct net_device_stats));
for (i=0; i < NR_CPUS; i++) {
for_each_cpu(i) {
struct net_device_stats *lb_stats;
if (!cpu_possible(i))
continue;
lb_stats = &per_cpu(loopback_stats, i);
stats->rx_bytes += lb_stats->rx_bytes;
stats->tx_bytes += lb_stats->tx_bytes;

3
drivers/oprofile/cpu_buffer.c
View File

@ -38,9 +38,8 @@ void free_cpu_buffers(void)
{
int i;
for_each_online_cpu(i) {
for_each_online_cpu(i)
vfree(cpu_buffer[i].buffer);
}
}
int alloc_cpu_buffers(void)

7
fs/xfs/linux-2.6/xfs_stats.c
View File

@ -62,18 +62,15 @@ xfs_read_xfsstats(
while (j < xstats[i].endpoint) {
val = 0;
/* sum over all cpus */
for (c = 0; c < NR_CPUS; c++) {
if (!cpu_possible(c)) continue;
for_each_cpu(c)
val += *(((__u32*)&per_cpu(xfsstats, c) + j));
}
len += sprintf(buffer + len, " %u", val);
j++;
}
buffer[len++] = '\n';
}
/* extra precision counters */
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_possible(i)) continue;
for_each_cpu(i) {
xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;

3
fs/xfs/linux-2.6/xfs_sysctl.c
View File

@ -38,8 +38,7 @@ xfs_stats_clear_proc_handler(
if (!ret && write && *valp) {
printk("XFS Clearing xfsstats\n");
for (c = 0; c < NR_CPUS; c++) {
if (!cpu_possible(c)) continue;
for_each_cpu(c) {
preempt_disable();
/* save vn_active, it's a universal truth! */
vn_active = per_cpu(xfsstats, c).vn_active;

5
include/asm-alpha/mmu_context.h
View File

@ -231,9 +231,8 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
{
int i;
for (i = 0; i < NR_CPUS; i++)
if (cpu_online(i))
mm->context[i] = 0;
for_each_online_cpu(i)
mm->context[i] = 0;
if (tsk != current)
task_thread_info(tsk)->pcb.ptbr
= ((unsigned long)mm->pgd - IDENT_ADDR) >> PAGE_SHIFT;

4
include/asm-alpha/topology.h
View File

@ -27,8 +27,8 @@ static inline cpumask_t node_to_cpumask(int node)
cpumask_t node_cpu_mask = CPU_MASK_NONE;
int cpu;
for(cpu = 0; cpu < NR_CPUS; cpu++) {
if (cpu_online(cpu) && (cpu_to_node(cpu) == node))
for_each_online_cpu(cpu) {
if (cpu_to_node(cpu) == node)
cpu_set(cpu, node_cpu_mask);
}

7
include/asm-generic/percpu.h
View File

@ -19,10 +19,9 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
#define percpu_modcopy(pcpudst, src, size) \
do { \
unsigned int __i; \
for (__i = 0; __i < NR_CPUS; __i++) \
if (cpu_possible(__i)) \
memcpy((pcpudst)+__per_cpu_offset[__i], \
(src), (size)); \
for_each_cpu(__i) \
memcpy((pcpudst)+__per_cpu_offset[__i], \
(src), (size)); \
} while (0)
#else /* ! SMP */

7
include/asm-powerpc/percpu.h
View File

@ -27,10 +27,9 @@
#define percpu_modcopy(pcpudst, src, size) \
do { \
unsigned int __i; \
for (__i = 0; __i < NR_CPUS; __i++) \
if (cpu_possible(__i)) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
for_each_cpu(__i) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
} while (0)
extern void setup_per_cpu_areas(void);

7
include/asm-s390/percpu.h
View File

@ -46,10 +46,9 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
#define percpu_modcopy(pcpudst, src, size) \
do { \
unsigned int __i; \
for (__i = 0; __i < NR_CPUS; __i++) \
if (cpu_possible(__i)) \
memcpy((pcpudst)+__per_cpu_offset[__i], \
(src), (size)); \
for_each_cpu(__i) \
memcpy((pcpudst)+__per_cpu_offset[__i], \
(src), (size)); \
} while (0)
#else /* ! SMP */

7
include/asm-sparc64/percpu.h
View File

@ -26,10 +26,9 @@ register unsigned long __local_per_cpu_offset asm("g5");
#define percpu_modcopy(pcpudst, src, size) \
do { \
unsigned int __i; \
for (__i = 0; __i < NR_CPUS; __i++) \
if (cpu_possible(__i)) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
for_each_cpu(__i) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
} while (0)
#else /* ! SMP */

7
include/asm-x86_64/percpu.h
View File

@ -26,10 +26,9 @@
#define percpu_modcopy(pcpudst, src, size) \
do { \
unsigned int __i; \
for (__i = 0; __i < NR_CPUS; __i++) \
if (cpu_possible(__i)) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
for_each_cpu(__i) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
} while (0)
extern void setup_per_cpu_areas(void);

14
include/linux/genhd.h
View File

@ -149,22 +149,16 @@ struct disk_attribute {
({ \
typeof(gendiskp->dkstats->field) res = 0; \
int i; \
for (i=0; i < NR_CPUS; i++) { \
if (!cpu_possible(i)) \
continue; \
for_each_cpu(i) \
res += per_cpu_ptr(gendiskp->dkstats, i)->field; \
} \
res; \
})
static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {
int i;
for (i=0; i < NR_CPUS; i++) {
if (cpu_possible(i)) {
memset(per_cpu_ptr(gendiskp->dkstats, i), value,
sizeof (struct disk_stats));
}
}
for_each_cpu(i)
memset(per_cpu_ptr(gendiskp->dkstats, i), value,
sizeof (struct disk_stats));
}
#else