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| author | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-14 11:29:52 -0400 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-14 11:54:47 -0400 |
| commit | 5292e24a6acf5694e0a32c31e3321964176bc17e (patch) | |
| tree | 0b4a46ba0e4b85edcafc5c8339283c2793c6e3dd /Documentation/vm | |
| parent | 1991722a70ffb1f0199a5690a31a5c7822007b1f (diff) | |
| download | linux-5292e24a6acf5694e0a32c31e3321964176bc17e.tar.gz | |
mm/mmu_notifiers: Use 'interval_sub' as the variable for mmu_interval_notifier
The 'interval_sub' is placed on the 'notifier_subscriptions' interval tree. This eliminates the poor name 'mni' for this variable. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'Documentation/vm')
| -rw-r--r-- | Documentation/vm/hmm.rst | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/Documentation/vm/hmm.rst b/Documentation/vm/hmm.rst index 893a8ba0e9fe..95fec5968362 100644 --- a/Documentation/vm/hmm.rst +++ b/Documentation/vm/hmm.rst @@ -149,14 +149,14 @@ CPU page table into a device page table; HMM helps keep both synchronized. A device driver that wants to mirror a process address space must start with the registration of a mmu_interval_notifier:: - mni->ops = &driver_ops; - int mmu_interval_notifier_insert(struct mmu_interval_notifier *mni, - unsigned long start, unsigned long length, - struct mm_struct *mm); + int mmu_interval_notifier_insert(struct mmu_interval_notifier *interval_sub, + struct mm_struct *mm, unsigned long start, + unsigned long length, + const struct mmu_interval_notifier_ops *ops); -During the driver_ops->invalidate() callback the device driver must perform -the update action to the range (mark range read only, or fully unmap, -etc.). The device must complete the update before the driver callback returns. +During the ops->invalidate() callback the device driver must perform the +update action to the range (mark range read only, or fully unmap, etc.). The +device must complete the update before the driver callback returns. When the device driver wants to populate a range of virtual addresses, it can use:: @@ -183,7 +183,7 @@ The usage pattern is:: struct hmm_range range; ... - range.notifier = &mni; + range.notifier = &interval_sub; range.start = ...; range.end = ...; range.pfns = ...; @@ -191,11 +191,11 @@ The usage pattern is:: range.values = ...; range.pfn_shift = ...; - if (!mmget_not_zero(mni->notifier.mm)) + if (!mmget_not_zero(interval_sub->notifier.mm)) return -EFAULT; again: - range.notifier_seq = mmu_interval_read_begin(&mni); + range.notifier_seq = mmu_interval_read_begin(&interval_sub); down_read(&mm->mmap_sem); ret = hmm_range_fault(&range, HMM_RANGE_SNAPSHOT); if (ret) { |