diff options
Diffstat (limited to 'include/linux/mmu_notifier.h')
| -rw-r--r-- | include/linux/mmu_notifier.h | 47 |
1 files changed, 21 insertions, 26 deletions
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index c91b3bcd158f..b25dc9db19fc 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_MMU_NOTIFIER_H #define _LINUX_MMU_NOTIFIER_H @@ -95,17 +96,6 @@ struct mmu_notifier_ops { pte_t pte); /* - * Before this is invoked any secondary MMU is still ok to - * read/write to the page previously pointed to by the Linux - * pte because the page hasn't been freed yet and it won't be - * freed until this returns. If required set_page_dirty has to - * be called internally to this method. - */ - void (*invalidate_page)(struct mmu_notifier *mn, - struct mm_struct *mm, - unsigned long address); - - /* * invalidate_range_start() and invalidate_range_end() must be * paired and are called only when the mmap_sem and/or the * locks protecting the reverse maps are held. If the subsystem @@ -166,7 +156,8 @@ struct mmu_notifier_ops { * shared page-tables, it not necessary to implement the * invalidate_range_start()/end() notifiers, as * invalidate_range() alread catches the points in time when an - * external TLB range needs to be flushed. + * external TLB range needs to be flushed. For more in depth + * discussion on this see Documentation/vm/mmu_notifier.txt * * The invalidate_range() function is called under the ptl * spin-lock and not allowed to sleep. @@ -220,12 +211,11 @@ extern int __mmu_notifier_test_young(struct mm_struct *mm, unsigned long address); extern void __mmu_notifier_change_pte(struct mm_struct *mm, unsigned long address, pte_t pte); -extern void __mmu_notifier_invalidate_page(struct mm_struct *mm, - unsigned long address); extern void __mmu_notifier_invalidate_range_start(struct mm_struct *mm, unsigned long start, unsigned long end); extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm, - unsigned long start, unsigned long end); + unsigned long start, unsigned long end, + bool only_end); extern void __mmu_notifier_invalidate_range(struct mm_struct *mm, unsigned long start, unsigned long end); @@ -268,25 +258,25 @@ static inline void mmu_notifier_change_pte(struct mm_struct *mm, __mmu_notifier_change_pte(mm, address, pte); } -static inline void mmu_notifier_invalidate_page(struct mm_struct *mm, - unsigned long address) +static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm, + unsigned long start, unsigned long end) { if (mm_has_notifiers(mm)) - __mmu_notifier_invalidate_page(mm, address); + __mmu_notifier_invalidate_range_start(mm, start, end); } -static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm, +static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, unsigned long start, unsigned long end) { if (mm_has_notifiers(mm)) - __mmu_notifier_invalidate_range_start(mm, start, end); + __mmu_notifier_invalidate_range_end(mm, start, end, false); } -static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, +static inline void mmu_notifier_invalidate_range_only_end(struct mm_struct *mm, unsigned long start, unsigned long end) { if (mm_has_notifiers(mm)) - __mmu_notifier_invalidate_range_end(mm, start, end); + __mmu_notifier_invalidate_range_end(mm, start, end, true); } static inline void mmu_notifier_invalidate_range(struct mm_struct *mm, @@ -420,6 +410,11 @@ extern void mmu_notifier_synchronize(void); #else /* CONFIG_MMU_NOTIFIER */ +static inline int mm_has_notifiers(struct mm_struct *mm) +{ + return 0; +} + static inline void mmu_notifier_release(struct mm_struct *mm) { } @@ -442,17 +437,17 @@ static inline void mmu_notifier_change_pte(struct mm_struct *mm, { } -static inline void mmu_notifier_invalidate_page(struct mm_struct *mm, - unsigned long address) +static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm, + unsigned long start, unsigned long end) { } -static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm, +static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, unsigned long start, unsigned long end) { } -static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, +static inline void mmu_notifier_invalidate_range_only_end(struct mm_struct *mm, unsigned long start, unsigned long end) { } |