diff options
Diffstat (limited to 'mm/hmm.c')
| -rw-r--r-- | mm/hmm.c | 27 |
1 files changed, 15 insertions, 12 deletions
@@ -43,7 +43,6 @@ static const struct mmu_notifier_ops hmm_mmu_notifier_ops; * * @mm: mm struct this HMM struct is bound to * @lock: lock protecting ranges list - * @sequence: we track updates to the CPU page table with a sequence number * @ranges: list of range being snapshotted * @mirrors: list of mirrors for this mm * @mmu_notifier: mmu notifier to track updates to CPU page table @@ -52,7 +51,6 @@ static const struct mmu_notifier_ops hmm_mmu_notifier_ops; struct hmm { struct mm_struct *mm; spinlock_t lock; - atomic_t sequence; struct list_head ranges; struct list_head mirrors; struct mmu_notifier mmu_notifier; @@ -85,7 +83,6 @@ static struct hmm *hmm_register(struct mm_struct *mm) return NULL; INIT_LIST_HEAD(&hmm->mirrors); init_rwsem(&hmm->mirrors_sem); - atomic_set(&hmm->sequence, 0); hmm->mmu_notifier.ops = NULL; INIT_LIST_HEAD(&hmm->ranges); spin_lock_init(&hmm->lock); @@ -126,7 +123,7 @@ void hmm_mm_destroy(struct mm_struct *mm) kfree(mm->hmm); } -static int hmm_invalidate_range(struct hmm *hmm, +static int hmm_invalidate_range(struct hmm *hmm, bool device, const struct hmm_update *update) { struct hmm_mirror *mirror; @@ -147,6 +144,9 @@ static int hmm_invalidate_range(struct hmm *hmm, } spin_unlock(&hmm->lock); + if (!device) + return 0; + down_read(&hmm->mirrors_sem); list_for_each_entry(mirror, &hmm->mirrors, list) { int ret; @@ -189,18 +189,21 @@ static void hmm_release(struct mmu_notifier *mn, struct mm_struct *mm) } static int hmm_invalidate_range_start(struct mmu_notifier *mn, - struct mm_struct *mm, - unsigned long start, - unsigned long end, - bool blockable) + struct mm_struct *mm, + unsigned long start, + unsigned long end, + bool blockable) { + struct hmm_update update; struct hmm *hmm = mm->hmm; VM_BUG_ON(!hmm); - atomic_inc(&hmm->sequence); - - return 0; + update.start = start; + update.end = end; + update.event = HMM_UPDATE_INVALIDATE; + update.blockable = blockable; + return hmm_invalidate_range(hmm, true, &update); } static void hmm_invalidate_range_end(struct mmu_notifier *mn, @@ -217,7 +220,7 @@ static void hmm_invalidate_range_end(struct mmu_notifier *mn, update.end = end; update.event = HMM_UPDATE_INVALIDATE; update.blockable = true; - hmm_invalidate_range(hmm, &update); + hmm_invalidate_range(hmm, false, &update); } static const struct mmu_notifier_ops hmm_mmu_notifier_ops = { |