mirror of
https://github.com/torvalds/linux.git
synced 2026-01-25 07:47:50 +00:00
2670917c2f
With SMP and NO_HZ enabled, the CPU may still need to sleep even if the timer is disarmed. Switch to deciding whether to sleep based on pending resched. Additionally, because disabling IRQs does not block SIGALRM, it is also necessary to check for any pending timer alarms. This is a preparation for adding SMP support. Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com> Link: https://patch.msgid.link/20251027001815.1666872-4-tiwei.bie@linux.dev Signed-off-by: Johannes Berg <johannes.berg@intel.com>
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
*/
|
|
|
|
#ifndef __KERN_UTIL_H__
|
|
#define __KERN_UTIL_H__
|
|
|
|
#include <sysdep/ptrace.h>
|
|
#include <sysdep/faultinfo.h>
|
|
|
|
struct siginfo;
|
|
|
|
extern int uml_exitcode;
|
|
|
|
extern int kmalloc_ok;
|
|
|
|
extern unsigned long alloc_stack(int order, int atomic);
|
|
extern void free_stack(unsigned long stack, int order);
|
|
|
|
struct pt_regs;
|
|
extern void do_signal(struct pt_regs *regs);
|
|
extern void interrupt_end(void);
|
|
extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs,
|
|
void *mc);
|
|
|
|
extern unsigned long segv(struct faultinfo fi, unsigned long ip,
|
|
int is_user, struct uml_pt_regs *regs,
|
|
void *mc);
|
|
extern int handle_page_fault(unsigned long address, unsigned long ip,
|
|
int is_write, int is_user, int *code_out);
|
|
|
|
extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
|
|
extern void initial_thread_cb(void (*proc)(void *), void *arg);
|
|
|
|
extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
|
|
|
|
extern void uml_pm_wake(void);
|
|
|
|
extern int start_uml(void);
|
|
extern void paging_init(void);
|
|
|
|
extern void uml_cleanup(void);
|
|
extern void do_uml_exitcalls(void);
|
|
|
|
/*
|
|
* Are we disallowed to sleep? Used to choose between GFP_KERNEL and
|
|
* GFP_ATOMIC.
|
|
*/
|
|
extern int __uml_cant_sleep(void);
|
|
extern int get_current_pid(void);
|
|
extern int copy_from_user_proc(void *to, void *from, int size);
|
|
extern char *uml_strdup(const char *string);
|
|
int uml_need_resched(void);
|
|
|
|
extern unsigned long to_irq_stack(unsigned long *mask_out);
|
|
extern unsigned long from_irq_stack(int nested);
|
|
|
|
extern int singlestepping(void);
|
|
|
|
extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs,
|
|
void *mc);
|
|
extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs,
|
|
void *mc);
|
|
extern void fatal_sigsegv(void) __attribute__ ((noreturn));
|
|
|
|
void um_idle_sleep(void);
|
|
|
|
void kasan_map_memory(void *start, size_t len);
|
|
|
|
#endif
|