cregit-Linux how code gets into the kernel

Release 4.9 kernel/up.c

Directory: kernel
/*
 * Uniprocessor-only support functions.  The counterpart to kernel/smp.c
 */

#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/smp.h>
#include <linux/hypervisor.h>


int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int wait) { unsigned long flags; WARN_ON(cpu != 0); local_irq_save(flags); func(info); local_irq_restore(flags); return 0; }

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PersonTokensPropCommitsCommitProp
andrew mortonandrew morton4276.36%133.33%
david daneydavid daney1221.82%133.33%
ingo molnaringo molnar11.82%133.33%
Total55100.00%3100.00%

EXPORT_SYMBOL(smp_call_function_single);
int smp_call_function_single_async(int cpu, struct call_single_data *csd) { unsigned long flags; local_irq_save(flags); csd->func(csd->info); local_irq_restore(flags); return 0; }

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christoph hellwigchristoph hellwig3487.18%133.33%
jan karajan kara410.26%133.33%
frederic weisbeckerfrederic weisbecker12.56%133.33%
Total39100.00%3100.00%

EXPORT_SYMBOL(smp_call_function_single_async);
int on_each_cpu(smp_call_func_t func, void *info, int wait) { unsigned long flags; local_irq_save(flags); func(info); local_irq_restore(flags); return 0; }

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david daneydavid daney37100.00%1100.00%
Total37100.00%1100.00%

EXPORT_SYMBOL(on_each_cpu); /* * Note we still need to test the mask even for UP * because we actually can get an empty mask from * code that on SMP might call us without the local * CPU in the mask. */
void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func, void *info, bool wait) { unsigned long flags; if (cpumask_test_cpu(0, mask)) { local_irq_save(flags); func(info); local_irq_restore(flags); } }

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david daneydavid daney51100.00%1100.00%
Total51100.00%1100.00%

EXPORT_SYMBOL(on_each_cpu_mask); /* * Preemption is disabled here to make sure the cond_func is called under the * same condtions in UP and SMP. */
void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info), smp_call_func_t func, void *info, bool wait, gfp_t gfp_flags) { unsigned long flags; preempt_disable(); if (cond_func(0, info)) { local_irq_save(flags); func(info); local_irq_restore(flags); } preempt_enable(); }

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david daneydavid daney68100.00%1100.00%
Total68100.00%1100.00%

EXPORT_SYMBOL(on_each_cpu_cond);
int smp_call_on_cpu(unsigned int cpu, int (*func)(void *), void *par, bool phys) { int ret; if (cpu != 0) return -ENXIO; if (phys) hypervisor_pin_vcpu(0); ret = func(par); if (phys) hypervisor_pin_vcpu(-1); return ret; }

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juergen grossjuergen gross68100.00%1100.00%
Total68100.00%1100.00%

EXPORT_SYMBOL_GPL(smp_call_on_cpu);

Overall Contributors

PersonTokensPropCommitsCommitProp
david daneydavid daney18550.55%325.00%
juergen grossjuergen gross7620.77%216.67%
andrew mortonandrew morton5615.30%18.33%
christoph hellwigchristoph hellwig3810.38%18.33%
ingo molnaringo molnar41.09%216.67%
jan karajan kara41.09%18.33%
frederic weisbeckerfrederic weisbecker20.55%18.33%
paul gortmakerpaul gortmaker10.27%18.33%
Total366100.00%12100.00%
Directory: kernel