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mm/hmm: replace hmm_update with mmu_notifier_range

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The hmm_mirror_ops callback function sync_cpu_device_pagetables() passes a
struct hmm_update which is a simplified version of struct
mmu_notifier_range. This is unnecessary so replace hmm_update with
mmu_notifier_range directly.

Link: https://lore.kernel.org/r/20190726005650.2566-2-rcampbell@nvidia.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
[jgg: white space tuning]
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Ralph Campbell
2019-07-25 17:56:44 -07:00
committed by Jason Gunthorpe
parent e709accc76
commit 1f96180792
4 changed files with 20 additions and 45 deletions
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13
mm/hmm.c
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@@ -165,7 +165,6 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
{
struct hmm *hmm = container_of(mn, struct hmm, mmu_notifier);
struct hmm_mirror *mirror;
struct hmm_update update;
struct hmm_range *range;
unsigned long flags;
int ret = 0;
@@ -173,15 +172,10 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
if (!kref_get_unless_zero(&hmm->kref))
return 0;
update.start = nrange->start;
update.end = nrange->end;
update.event = HMM_UPDATE_INVALIDATE;
update.blockable = mmu_notifier_range_blockable(nrange);
spin_lock_irqsave(&hmm->ranges_lock, flags);
hmm->notifiers++;
list_for_each_entry(range, &hmm->ranges, list) {
if (update.end < range->start || update.start >= range->end)
if (nrange->end < range->start || nrange->start >= range->end)
continue;
range->valid = false;
@@ -198,9 +192,10 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
list_for_each_entry(mirror, &hmm->mirrors, list) {
int rc;
rc = mirror->ops->sync_cpu_device_pagetables(mirror, &update);
rc = mirror->ops->sync_cpu_device_pagetables(mirror, nrange);
if (rc) {
if (WARN_ON(update.blockable || rc != -EAGAIN))
if (WARN_ON(mmu_notifier_range_blockable(nrange) ||
rc != -EAGAIN))
continue;
ret = -EAGAIN;
break;