1 #ifndef __LINUX_VMACACHE_H 2 #define __LINUX_VMACACHE_H 3 4 #include <linux/sched.h> 5 #include <linux/mm.h> 6 7 /* 8 * Hash based on the page number. Provides a good hit rate for 9 * workloads with good locality and those with random accesses as well. 10 */ 11 #define VMACACHE_HASH(addr) ((addr >> PAGE_SHIFT) & VMACACHE_MASK) 12 vmacache_flush(struct task_struct * tsk)13static inline void vmacache_flush(struct task_struct *tsk) 14 { 15 memset(tsk->vmacache, 0, sizeof(tsk->vmacache)); 16 } 17 18 extern void vmacache_update(unsigned long addr, struct vm_area_struct *newvma); 19 extern struct vm_area_struct *vmacache_find(struct mm_struct *mm, 20 unsigned long addr); 21 22 #ifndef CONFIG_MMU 23 extern struct vm_area_struct *vmacache_find_exact(struct mm_struct *mm, 24 unsigned long start, 25 unsigned long end); 26 #endif 27 vmacache_invalidate(struct mm_struct * mm)28static inline void vmacache_invalidate(struct mm_struct *mm) 29 { 30 mm->vmacache_seqnum++; 31 } 32 33 #endif /* __LINUX_VMACACHE_H */ 34