1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_VMACACHE_H
3#define __LINUX_VMACACHE_H
4
5#include <linux/sched.h>
6#include <linux/mm.h>
7
8static inline void vmacache_flush(struct task_struct *tsk)
9{
10 memset(tsk->vmacache.vmas, 0, sizeof(tsk->vmacache.vmas));
11}
12
13extern void vmacache_flush_all(struct mm_struct *mm);
14extern void vmacache_update(unsigned long addr, struct vm_area_struct *newvma);
15extern struct vm_area_struct *vmacache_find(struct mm_struct *mm,
16 unsigned long addr);
17
18#ifndef CONFIG_MMU
19extern struct vm_area_struct *vmacache_find_exact(struct mm_struct *mm,
20 unsigned long start,
21 unsigned long end);
22#endif
23
24static inline void vmacache_invalidate(struct mm_struct *mm)
25{
26 mm->vmacache_seqnum++;
27
28 /* deal with overflows */
29 if (unlikely(mm->vmacache_seqnum == 0))
30 vmacache_flush_all(mm);
31}
32
33#endif /* __LINUX_VMACACHE_H */
34