The patch titled
Subject: mm: rename migrate_pgmap_owner
has been added to the -mm tree. Its filename is
mm-rename-migrate_pgmap_owner.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-rename-migrate_pgmap_owner.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-rename-migrate_pgmap_owner.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
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------------------------------------------------------
From: Alistair Popple <apopple@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx
Signed-off-by: Alistair Popple <apopple@xxxxxxxxxx>
Suggested-by: Peter Xu <peterx@xxxxxxxxxx>
Reviewed-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/hmm.rst | 2 +-
drivers/gpu/drm/nouveau/nouveau_svm.c | 2 +-
include/linux/mmu_notifier.h | 20 ++++++++++----------
lib/test_hmm.c | 2 +-
mm/migrate.c | 10 +++++-----
5 files changed, 18 insertions(+), 18 deletions(-)
--- a/Documentation/vm/hmm.rst~mm-rename-migrate_pgmap_owner
+++ a/Documentation/vm/hmm.rst
@@ -332,7 +332,7 @@ between device driver specific code and
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.
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c~mm-rename-migrate_pgmap_owner
+++ a/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -265,7 +265,7 @@ nouveau_svmm_invalidate_range_start(stru
* 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) {
--- a/include/linux/mmu_notifier.h~mm-rename-migrate_pgmap_owner
+++ a/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_in
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_i
#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
--- a/lib/test_hmm.c~mm-rename-migrate_pgmap_owner
+++ a/lib/test_hmm.c
@@ -218,7 +218,7 @@ static bool dmirror_interval_invalidate(
* 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))
--- a/mm/migrate.c~mm-rename-migrate_pgmap_owner
+++ a/mm/migrate.c
@@ -2416,8 +2416,8 @@ static void migrate_vma_collect(struct m
* 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_vm
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);
}
_
Patches currently in -mm which might be from apopple@xxxxxxxxxx are
mm-remove-special-swap-entry-functions.patch
mm-swapops-rework-swap-entry-manipulation-code.patch
mm-rmap-split-try_to_munlock-from-try_to_unmap.patch
mm-rmap-split-migration-into-its-own-function.patch
mm-rename-migrate_pgmap_owner.patch
mm-memoryc-allow-different-return-codes-for-copy_nonpresent_pte.patch
mm-device-exclusive-memory-access.patch
mm-selftests-for-exclusive-device-memory.patch
nouveau-svm-refactor-nouveau_range_fault.patch
nouveau-svm-implement-atomic-svm-access.patch
