mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 04:46:46 +07:00
aab2545fdd
use_mm() was changed to use switch_mm() instead of activate_mm(), since then nobody calls (and nobody should call) activate_mm() with PF_BORROWED_MM bit set. As Jeff Dike pointed out, we can also remove the "old != new" check, it is always true. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
|
|
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __UM_MMU_CONTEXT_H
|
|
#define __UM_MMU_CONTEXT_H
|
|
|
|
#include "linux/sched.h"
|
|
#include "um_mmu.h"
|
|
|
|
extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
|
|
extern void arch_exit_mmap(struct mm_struct *mm);
|
|
|
|
#define get_mmu_context(task) do ; while(0)
|
|
#define activate_context(tsk) do ; while(0)
|
|
|
|
#define deactivate_mm(tsk,mm) do { } while (0)
|
|
|
|
extern void force_flush_all(void);
|
|
|
|
static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
|
|
{
|
|
/*
|
|
* This is called by fs/exec.c and sys_unshare()
|
|
* when the new ->mm is used for the first time.
|
|
*/
|
|
__switch_mm(&new->context.id);
|
|
arch_dup_mmap(old, new);
|
|
}
|
|
|
|
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
|
|
struct task_struct *tsk)
|
|
{
|
|
unsigned cpu = smp_processor_id();
|
|
|
|
if(prev != next){
|
|
cpu_clear(cpu, prev->cpu_vm_mask);
|
|
cpu_set(cpu, next->cpu_vm_mask);
|
|
if(next != &init_mm)
|
|
__switch_mm(&next->context.id);
|
|
}
|
|
}
|
|
|
|
static inline void enter_lazy_tlb(struct mm_struct *mm,
|
|
struct task_struct *tsk)
|
|
{
|
|
}
|
|
|
|
extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
|
|
|
|
extern void destroy_context(struct mm_struct *mm);
|
|
|
|
#endif
|