Contributors: 42
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jens Axboe |
108 |
13.20% |
1 |
1.09% |
| Linus Torvalds (pre-git) |
98 |
11.98% |
20 |
21.74% |
| Peter Zijlstra |
84 |
10.27% |
6 |
6.52% |
| Rusty Russell |
67 |
8.19% |
5 |
5.43% |
| Ingo Molnar |
49 |
5.99% |
7 |
7.61% |
| Thomas Gleixner |
42 |
5.13% |
5 |
5.43% |
| Andi Kleen |
35 |
4.28% |
2 |
2.17% |
| Andrew Morton |
35 |
4.28% |
7 |
7.61% |
| Nicholas Piggin |
32 |
3.91% |
1 |
1.09% |
| Nadav Amit |
28 |
3.42% |
2 |
2.17% |
| Américo Wang |
26 |
3.18% |
1 |
1.09% |
| Rik Van Riel |
22 |
2.69% |
1 |
1.09% |
| Juergen Gross |
18 |
2.20% |
1 |
1.09% |
| David Howells |
18 |
2.20% |
1 |
1.09% |
| David Daney |
15 |
1.83% |
2 |
2.17% |
| Richard Weinberger |
14 |
1.71% |
1 |
1.09% |
| Robert Love |
11 |
1.34% |
1 |
1.09% |
| Huang Ying |
10 |
1.22% |
1 |
1.09% |
| He Ying |
10 |
1.22% |
1 |
1.09% |
| Arjan van de Ven |
10 |
1.22% |
1 |
1.09% |
| Sebastian Andrzej Siewior |
8 |
0.98% |
1 |
1.09% |
| Valentin Schneider |
8 |
0.98% |
1 |
1.09% |
| Con Kolivas |
7 |
0.86% |
1 |
1.09% |
| Linus Torvalds |
6 |
0.73% |
2 |
2.17% |
| Chuansheng Liu |
6 |
0.73% |
1 |
1.09% |
| Eric W. Biedermann |
6 |
0.73% |
1 |
1.09% |
| Heiko Carstens |
6 |
0.73% |
2 |
2.17% |
| Mike Travis |
6 |
0.73% |
1 |
1.09% |
| Takao Indoh |
6 |
0.73% |
1 |
1.09% |
| Shaohua Li |
4 |
0.49% |
1 |
1.09% |
| David S. Miller |
3 |
0.37% |
1 |
1.09% |
| Jan Kara |
3 |
0.37% |
1 |
1.09% |
| Gilad Ben-Yossef |
2 |
0.24% |
1 |
1.09% |
| Qais Yousef |
2 |
0.24% |
1 |
1.09% |
| Josh Poimboeuf |
2 |
0.24% |
2 |
2.17% |
| Paul Gortmaker |
2 |
0.24% |
1 |
1.09% |
| Alexey Dobriyan |
2 |
0.24% |
1 |
1.09% |
| Paul Mackerras |
2 |
0.24% |
1 |
1.09% |
| Christoph Hellwig |
2 |
0.24% |
1 |
1.09% |
| Leonardo Brás |
1 |
0.12% |
1 |
1.09% |
| Greg Kroah-Hartman |
1 |
0.12% |
1 |
1.09% |
| Frédéric Weisbecker |
1 |
0.12% |
1 |
1.09% |
| Total |
818 |
|
92 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_SMP_H
#define __LINUX_SMP_H
/*
* Generic SMP support
* Alan Cox. <alan@redhat.com>
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/smp_types.h>
typedef void (*smp_call_func_t)(void *info);
typedef bool (*smp_cond_func_t)(int cpu, void *info);
/*
* structure shares (partial) layout with struct irq_work
*/
struct __call_single_data {
struct __call_single_node node;
smp_call_func_t func;
void *info;
};
#define CSD_INIT(_func, _info) \
(struct __call_single_data){ .func = (_func), .info = (_info), }
/* Use __aligned() to avoid to use 2 cache lines for 1 csd */
typedef struct __call_single_data call_single_data_t
__aligned(sizeof(struct __call_single_data));
#define INIT_CSD(_csd, _func, _info) \
do { \
*(_csd) = CSD_INIT((_func), (_info)); \
} while (0)
/*
* Enqueue a llist_node on the call_single_queue; be very careful, read
* flush_smp_call_function_queue() in detail.
*/
extern void __smp_call_single_queue(int cpu, struct llist_node *node);
/* total number of cpus in this system (may exceed NR_CPUS) */
extern unsigned int total_cpus;
int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
int wait);
void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
void *info, bool wait, const struct cpumask *mask);
int smp_call_function_single_async(int cpu, call_single_data_t *csd);
/*
* Cpus stopping functions in panic. All have default weak definitions.
* Architecture-dependent code may override them.
*/
void __noreturn panic_smp_self_stop(void);
void __noreturn nmi_panic_self_stop(struct pt_regs *regs);
void crash_smp_send_stop(void);
/*
* Call a function on all processors
*/
static inline void on_each_cpu(smp_call_func_t func, void *info, int wait)
{
on_each_cpu_cond_mask(NULL, func, info, wait, cpu_online_mask);
}
/**
* on_each_cpu_mask(): Run a function on processors specified by
* cpumask, which may include the local processor.
* @mask: The set of cpus to run on (only runs on online subset).
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait (atomically) until function has completed
* on other CPUs.
*
* If @wait is true, then returns once @func has returned.
*
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler. The
* exception is that it may be used during early boot while
* early_boot_irqs_disabled is set.
*/
static inline void on_each_cpu_mask(const struct cpumask *mask,
smp_call_func_t func, void *info, bool wait)
{
on_each_cpu_cond_mask(NULL, func, info, wait, mask);
}
/*
* Call a function on each processor for which the supplied function
* cond_func returns a positive value. This may include the local
* processor. May be used during early boot while early_boot_irqs_disabled is
* set. Use local_irq_save/restore() instead of local_irq_disable/enable().
*/
static inline void on_each_cpu_cond(smp_cond_func_t cond_func,
smp_call_func_t func, void *info, bool wait)
{
on_each_cpu_cond_mask(cond_func, func, info, wait, cpu_online_mask);
}
/*
* Architecture specific boot CPU setup. Defined as empty weak function in
* init/main.c. Architectures can override it.
*/
void smp_prepare_boot_cpu(void);
#ifdef CONFIG_SMP
#include <linux/preempt.h>
#include <linux/compiler.h>
#include <linux/thread_info.h>
#include <asm/smp.h>
/*
* main cross-CPU interfaces, handles INIT, TLB flush, STOP, etc.
* (defined in asm header):
*/
/*
* stops all CPUs but the current one:
*/
extern void smp_send_stop(void);
/*
* sends a 'reschedule' event to another CPU:
*/
extern void arch_smp_send_reschedule(int cpu);
/*
* scheduler_ipi() is inline so can't be passed as callback reason, but the
* callsite IP should be sufficient for root-causing IPIs sent from here.
*/
#define smp_send_reschedule(cpu) ({ \
trace_ipi_send_cpu(cpu, _RET_IP_, NULL); \
arch_smp_send_reschedule(cpu); \
})
/*
* Prepare machine for booting other CPUs.
*/
extern void smp_prepare_cpus(unsigned int max_cpus);
/*
* Bring a CPU up
*/
extern int __cpu_up(unsigned int cpunum, struct task_struct *tidle);
/*
* Final polishing of CPUs
*/
extern void smp_cpus_done(unsigned int max_cpus);
/*
* Call a function on all other processors
*/
void smp_call_function(smp_call_func_t func, void *info, int wait);
void smp_call_function_many(const struct cpumask *mask,
smp_call_func_t func, void *info, bool wait);
int smp_call_function_any(const struct cpumask *mask,
smp_call_func_t func, void *info, int wait);
void kick_all_cpus_sync(void);
void wake_up_all_idle_cpus(void);
/*
* Generic and arch helpers
*/
void __init call_function_init(void);
void generic_smp_call_function_single_interrupt(void);
#define generic_smp_call_function_interrupt \
generic_smp_call_function_single_interrupt
extern unsigned int setup_max_cpus;
extern void __init setup_nr_cpu_ids(void);
extern void __init smp_init(void);
extern int __boot_cpu_id;
static inline int get_boot_cpu_id(void)
{
return __boot_cpu_id;
}
#else /* !SMP */
static inline void smp_send_stop(void) { }
/*
* These macros fold the SMP functionality into a single CPU system
*/
#define raw_smp_processor_id() 0
static inline void up_smp_call_function(smp_call_func_t func, void *info)
{
}
#define smp_call_function(func, info, wait) \
(up_smp_call_function(func, info))
static inline void smp_send_reschedule(int cpu) { }
#define smp_call_function_many(mask, func, info, wait) \
(up_smp_call_function(func, info))
static inline void call_function_init(void) { }
static inline int
smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
void *info, int wait)
{
return smp_call_function_single(0, func, info, wait);
}
static inline void kick_all_cpus_sync(void) { }
static inline void wake_up_all_idle_cpus(void) { }
#define setup_max_cpus 0
#ifdef CONFIG_UP_LATE_INIT
extern void __init up_late_init(void);
static inline void smp_init(void) { up_late_init(); }
#else
static inline void smp_init(void) { }
#endif
static inline int get_boot_cpu_id(void)
{
return 0;
}
#endif /* !SMP */
/**
* raw_processor_id() - get the current (unstable) CPU id
*
* For then you know what you are doing and need an unstable
* CPU id.
*/
/**
* smp_processor_id() - get the current (stable) CPU id
*
* This is the normal accessor to the CPU id and should be used
* whenever possible.
*
* The CPU id is stable when:
*
* - IRQs are disabled;
* - preemption is disabled;
* - the task is CPU affine.
*
* When CONFIG_DEBUG_PREEMPT; we verify these assumption and WARN
* when smp_processor_id() is used when the CPU id is not stable.
*/
/*
* Allow the architecture to differentiate between a stable and unstable read.
* For example, x86 uses an IRQ-safe asm-volatile read for the unstable but a
* regular asm read for the stable.
*/
#ifndef __smp_processor_id
#define __smp_processor_id() raw_smp_processor_id()
#endif
#ifdef CONFIG_DEBUG_PREEMPT
extern unsigned int debug_smp_processor_id(void);
# define smp_processor_id() debug_smp_processor_id()
#else
# define smp_processor_id() __smp_processor_id()
#endif
#define get_cpu() ({ preempt_disable(); __smp_processor_id(); })
#define put_cpu() preempt_enable()
/*
* Callback to arch code if there's nosmp or maxcpus=0 on the
* boot command line:
*/
extern void arch_disable_smp_support(void);
extern void arch_thaw_secondary_cpus_begin(void);
extern void arch_thaw_secondary_cpus_end(void);
void smp_setup_processor_id(void);
int smp_call_on_cpu(unsigned int cpu, int (*func)(void *), void *par,
bool phys);
/* SMP core functions */
int smpcfd_prepare_cpu(unsigned int cpu);
int smpcfd_dead_cpu(unsigned int cpu);
int smpcfd_dying_cpu(unsigned int cpu);
#endif /* __LINUX_SMP_H */