cregit-Linux how code gets into the kernel

Release 4.16 include/linux/vtime.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KERNEL_VTIME_H

#define _LINUX_KERNEL_VTIME_H

#include <linux/context_tracking_state.h>
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#include <asm/vtime.h>
#endif


struct task_struct;

/*
 * vtime_accounting_cpu_enabled() definitions/declarations
 */
#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)

static inline bool vtime_accounting_cpu_enabled(void) { return true; }

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#elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN) /* * Checks if vtime is enabled on some CPU. Cputime readers want to be careful * in that case and compute the tickless cputime. * For now vtime state is tied to context tracking. We might want to decouple * those later if necessary. */
static inline bool vtime_accounting_enabled(void) { return context_tracking_is_enabled(); }

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static inline bool vtime_accounting_cpu_enabled(void) { if (vtime_accounting_enabled()) { if (context_tracking_cpu_is_enabled()) return true; } return false; }

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#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
static inline bool vtime_accounting_cpu_enabled(void) { return false; }

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#endif /* * Common vtime APIs */ #ifdef CONFIG_VIRT_CPU_ACCOUNTING #ifdef __ARCH_HAS_VTIME_TASK_SWITCH extern void vtime_task_switch(struct task_struct *prev); #else extern void vtime_common_task_switch(struct task_struct *prev);
static inline void vtime_task_switch(struct task_struct *prev) { if (vtime_accounting_cpu_enabled()) vtime_common_task_switch(prev); }

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#endif /* __ARCH_HAS_VTIME_TASK_SWITCH */ extern void vtime_account_system(struct task_struct *tsk); extern void vtime_account_idle(struct task_struct *tsk); #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
static inline void vtime_task_switch(struct task_struct *prev) { }

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static inline void vtime_account_system(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%2100.00%
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#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */ #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN extern void arch_vtime_task_switch(struct task_struct *tsk); extern void vtime_user_enter(struct task_struct *tsk); extern void vtime_user_exit(struct task_struct *tsk); extern void vtime_guest_enter(struct task_struct *tsk); extern void vtime_guest_exit(struct task_struct *tsk); extern void vtime_init_idle(struct task_struct *tsk, int cpu); #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
static inline void vtime_user_enter(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%1100.00%
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static inline void vtime_user_exit(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%1100.00%
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static inline void vtime_guest_enter(struct task_struct *tsk) { }

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static inline void vtime_guest_exit(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%1100.00%
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static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }

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#endif #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE extern void vtime_account_irq_enter(struct task_struct *tsk);
static inline void vtime_account_irq_exit(struct task_struct *tsk) { /* On hard|softirq exit we always account to hard|softirq cputime */ vtime_account_system(tsk); }

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Frédéric Weisbecker18100.00%1100.00%
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extern void vtime_flush(struct task_struct *tsk); #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
static inline void vtime_account_irq_enter(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%1100.00%
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static inline void vtime_account_irq_exit(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%1100.00%
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static inline void vtime_flush(struct task_struct *tsk) { }

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Frédéric Weisbecker11100.00%1100.00%
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#endif #ifdef CONFIG_IRQ_TIME_ACCOUNTING extern void irqtime_account_irq(struct task_struct *tsk); #else
static inline void irqtime_account_irq(struct task_struct *tsk) { }

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#endif
static inline void account_irq_enter_time(struct task_struct *tsk) { vtime_account_irq_enter(tsk); irqtime_account_irq(tsk); }

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Frédéric Weisbecker22100.00%3100.00%
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static inline void account_irq_exit_time(struct task_struct *tsk) { vtime_account_irq_exit(tsk); irqtime_account_irq(tsk); }

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#endif /* _LINUX_KERNEL_VTIME_H */

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Frédéric Weisbecker48899.80%1894.74%
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Directory: include/linux
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