diff options
| -rw-r--r-- | include/linux/mmu_notifier.h | 46 | ||||
| -rw-r--r-- | mm/mmu_notifier.c | 13 |
2 files changed, 30 insertions, 29 deletions
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 1bd8e6a09a3c..12bd603d318c 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -7,8 +7,9 @@ #include <linux/mm_types.h> #include <linux/srcu.h> +struct mmu_notifier_mm; struct mmu_notifier; -struct mmu_notifier_ops; +struct mmu_notifier_range; /** * enum mmu_notifier_event - reason for the mmu notifier callback @@ -40,36 +41,8 @@ enum mmu_notifier_event { MMU_NOTIFY_SOFT_DIRTY, }; -#ifdef CONFIG_MMU_NOTIFIER - -#ifdef CONFIG_LOCKDEP -extern struct lockdep_map __mmu_notifier_invalidate_range_start_map; -#endif - -/* - * The mmu notifier_mm structure is allocated and installed in - * mm->mmu_notifier_mm inside the mm_take_all_locks() protected - * critical section and it's released only when mm_count reaches zero - * in mmdrop(). - */ -struct mmu_notifier_mm { - /* all mmu notifiers registerd in this mm are queued in this list */ - struct hlist_head list; - /* to serialize the list modifications and hlist_unhashed */ - spinlock_t lock; -}; - #define MMU_NOTIFIER_RANGE_BLOCKABLE (1 << 0) -struct mmu_notifier_range { - struct vm_area_struct *vma; - struct mm_struct *mm; - unsigned long start; - unsigned long end; - unsigned flags; - enum mmu_notifier_event event; -}; - struct mmu_notifier_ops { /* * Called either by mmu_notifier_unregister or when the mm is @@ -249,6 +222,21 @@ struct mmu_notifier { unsigned int users; }; +#ifdef CONFIG_MMU_NOTIFIER + +#ifdef CONFIG_LOCKDEP +extern struct lockdep_map __mmu_notifier_invalidate_range_start_map; +#endif + +struct mmu_notifier_range { + struct vm_area_struct *vma; + struct mm_struct *mm; + unsigned long start; + unsigned long end; + unsigned flags; + enum mmu_notifier_event event; +}; + static inline int mm_has_notifiers(struct mm_struct *mm) { return unlikely(mm->mmu_notifier_mm); diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c index 7fde88695f35..367670cfd02b 100644 --- a/mm/mmu_notifier.c +++ b/mm/mmu_notifier.c @@ -28,6 +28,19 @@ struct lockdep_map __mmu_notifier_invalidate_range_start_map = { #endif /* + * The mmu notifier_mm structure is allocated and installed in + * mm->mmu_notifier_mm inside the mm_take_all_locks() protected + * critical section and it's released only when mm_count reaches zero + * in mmdrop(). + */ +struct mmu_notifier_mm { + /* all mmu notifiers registered in this mm are queued in this list */ + struct hlist_head list; + /* to serialize the list modifications and hlist_unhashed */ + spinlock_t lock; +}; + +/* * This function can't run concurrently against mmu_notifier_register * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap * runs with mm_users == 0. Other tasks may still invoke mmu notifiers |