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authorJason Gunthorpe <jgg@mellanox.com>2020-01-14 11:29:52 -0400
committerJason Gunthorpe <jgg@mellanox.com>2020-01-14 11:54:47 -0400
commit5292e24a6acf5694e0a32c31e3321964176bc17e (patch)
tree0b4a46ba0e4b85edcafc5c8339283c2793c6e3dd /Documentation/vm
parent1991722a70ffb1f0199a5690a31a5c7822007b1f (diff)
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.rst20
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) {