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authorAlistair Popple2021-06-30 18:54:19 -0700
committerLinus Torvalds2021-07-01 11:06:03 -0700
commit6b49bf6ddbb0d7992c816846acfa5fd1cf751c36 (patch)
tree5699f9b7052f65a8df38c1e37c93d26408faf6e9
parenta98a2f0c8ce1b2138cb8e3ae410444dedcc14809 (diff)
mm: rename migrate_pgmap_owner
MMU notifier ranges have a migrate_pgmap_owner field which is used by drivers to store a pointer. This is subsequently used by the driver callback to filter MMU_NOTIFY_MIGRATE events. Other notifier event types can also benefit from this filtering, so rename the 'migrate_pgmap_owner' field to 'owner' and create a new notifier initialisation function to initialise this field. Link: https://lkml.kernel.org/r/20210616105937.23201-6-apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Suggested-by: Peter Xu <peterx@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: Ralph Campbell <rcampbell@nvidia.com> Cc: Shakeel Butt <shakeelb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/vm/hmm.rst2
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_svm.c2
-rw-r--r--include/linux/mmu_notifier.h20
-rw-r--r--lib/test_hmm.c2
-rw-r--r--mm/migrate.c10
5 files changed, 18 insertions, 18 deletions
diff --git a/Documentation/vm/hmm.rst b/Documentation/vm/hmm.rst
index 09e28507f5b2..3df79307a797 100644
--- a/Documentation/vm/hmm.rst
+++ b/Documentation/vm/hmm.rst
@@ -332,7 +332,7 @@ between device driver specific code and shared common code:
walks to fill in the ``args->src`` array with PFNs to be migrated.
The ``invalidate_range_start()`` callback is passed a
``struct mmu_notifier_range`` with the ``event`` field set to
- ``MMU_NOTIFY_MIGRATE`` and the ``migrate_pgmap_owner`` field set to
+ ``MMU_NOTIFY_MIGRATE`` and the ``owner`` field set to
the ``args->pgmap_owner`` field passed to migrate_vma_setup(). This is
allows the device driver to skip the invalidation callback and only
invalidate device private MMU mappings that are actually migrating.
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c
index 1c3f890377d2..e963f7d81953 100644
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -265,7 +265,7 @@ nouveau_svmm_invalidate_range_start(struct mmu_notifier *mn,
* the invalidation is handled as part of the migration process.
*/
if (update->event == MMU_NOTIFY_MIGRATE &&
- update->migrate_pgmap_owner == svmm->vmm->cli->drm->dev)
+ update->owner == svmm->vmm->cli->drm->dev)
goto out;
if (limit > svmm->unmanaged.start && start < svmm->unmanaged.limit) {
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 1a6a9eb6d3fa..8e428eb813b8 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -41,7 +41,7 @@ struct mmu_interval_notifier;
*
* @MMU_NOTIFY_MIGRATE: used during migrate_vma_collect() invalidate to signal
* a device driver to possibly ignore the invalidation if the
- * migrate_pgmap_owner field matches the driver's device private pgmap owner.
+ * owner field matches the driver's device private pgmap owner.
*/
enum mmu_notifier_event {
MMU_NOTIFY_UNMAP = 0,
@@ -269,7 +269,7 @@ struct mmu_notifier_range {
unsigned long end;
unsigned flags;
enum mmu_notifier_event event;
- void *migrate_pgmap_owner;
+ void *owner;
};
static inline int mm_has_notifiers(struct mm_struct *mm)
@@ -521,14 +521,14 @@ static inline void mmu_notifier_range_init(struct mmu_notifier_range *range,
range->flags = flags;
}
-static inline void mmu_notifier_range_init_migrate(
- struct mmu_notifier_range *range, unsigned int flags,
+static inline void mmu_notifier_range_init_owner(
+ struct mmu_notifier_range *range,
+ enum mmu_notifier_event event, unsigned int flags,
struct vm_area_struct *vma, struct mm_struct *mm,
- unsigned long start, unsigned long end, void *pgmap)
+ unsigned long start, unsigned long end, void *owner)
{
- mmu_notifier_range_init(range, MMU_NOTIFY_MIGRATE, flags, vma, mm,
- start, end);
- range->migrate_pgmap_owner = pgmap;
+ mmu_notifier_range_init(range, event, flags, vma, mm, start, end);
+ range->owner = owner;
}
#define ptep_clear_flush_young_notify(__vma, __address, __ptep) \
@@ -655,8 +655,8 @@ static inline void _mmu_notifier_range_init(struct mmu_notifier_range *range,
#define mmu_notifier_range_init(range,event,flags,vma,mm,start,end) \
_mmu_notifier_range_init(range, start, end)
-#define mmu_notifier_range_init_migrate(range, flags, vma, mm, start, end, \
- pgmap) \
+#define mmu_notifier_range_init_owner(range, event, flags, vma, mm, start, \
+ end, owner) \
_mmu_notifier_range_init(range, start, end)
static inline bool
diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 15f2e2db77bc..fc7a20bc9b42 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -218,7 +218,7 @@ static bool dmirror_interval_invalidate(struct mmu_interval_notifier *mni,
* the invalidation is handled as part of the migration process.
*/
if (range->event == MMU_NOTIFY_MIGRATE &&
- range->migrate_pgmap_owner == dmirror->mdevice)
+ range->owner == dmirror->mdevice)
return true;
if (mmu_notifier_range_blockable(range))
diff --git a/mm/migrate.c b/mm/migrate.c
index a69f54bd92b9..23cbd9de030b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2416,8 +2416,8 @@ static void migrate_vma_collect(struct migrate_vma *migrate)
* that the registered device driver can skip invalidating device
* private page mappings that won't be migrated.
*/
- mmu_notifier_range_init_migrate(&range, 0, migrate->vma,
- migrate->vma->vm_mm, migrate->start, migrate->end,
+ mmu_notifier_range_init_owner(&range, MMU_NOTIFY_MIGRATE, 0,
+ migrate->vma, migrate->vma->vm_mm, migrate->start, migrate->end,
migrate->pgmap_owner);
mmu_notifier_invalidate_range_start(&range);
@@ -2927,9 +2927,9 @@ void migrate_vma_pages(struct migrate_vma *migrate)
if (!notified) {
notified = true;
- mmu_notifier_range_init_migrate(&range, 0,
- migrate->vma, migrate->vma->vm_mm,
- addr, migrate->end,
+ mmu_notifier_range_init_owner(&range,
+ MMU_NOTIFY_MIGRATE, 0, migrate->vma,
+ migrate->vma->vm_mm, addr, migrate->end,
migrate->pgmap_owner);
mmu_notifier_invalidate_range_start(&range);
}