[linux-2.6-block.git] / include / linux / vmacache.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_VMACACHE_H
#define __LINUX_VMACACHE_H

#include <linux/sched.h>
#include <linux/mm.h>

static inline void vmacache_flush(struct task_struct *tsk)
{
	memset(tsk->vmacache.vmas, 0, sizeof(tsk->vmacache.vmas));
}

extern void vmacache_flush_all(struct mm_struct *mm);
extern void vmacache_update(unsigned long addr, struct vm_area_struct *newvma);
extern struct vm_area_struct *vmacache_find(struct mm_struct *mm,
						    unsigned long addr);

#ifndef CONFIG_MMU
extern struct vm_area_struct *vmacache_find_exact(struct mm_struct *mm,
						  unsigned long start,
						  unsigned long end);
#endif

static inline void vmacache_invalidate(struct mm_struct *mm)
{
	mm->vmacache_seqnum++;

	/* deal with overflows */
	if (unlikely(mm->vmacache_seqnum == 0))
		vmacache_flush_all(mm);
}

#endif /* __LINUX_VMACACHE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
615d6e87 DB	2	#ifndef __LINUX_VMACACHE_H
	3	#define __LINUX_VMACACHE_H
	4
	5	#include <linux/sched.h>
	6	#include <linux/mm.h>
	7
615d6e87 DB	8	static inline void vmacache_flush(struct task_struct *tsk)
615d6e87 DB	9	{
314ff785	10	memset(tsk->vmacache.vmas, 0, sizeof(tsk->vmacache.vmas));
615d6e87 DB	11	}
	12
	13	extern void vmacache_flush_all(struct mm_struct *mm);
	14	extern void vmacache_update(unsigned long addr, struct vm_area_struct *newvma);
	15	extern struct vm_area_struct vmacache_find(struct mm_struct mm,
	16	unsigned long addr);
	17
	18	#ifndef CONFIG_MMU
	19	extern struct vm_area_struct vmacache_find_exact(struct mm_struct mm,
	20	unsigned long start,
	21	unsigned long end);
	22	#endif
	23
	24	static 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 */