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authorRalph Campbell <rcampbell@nvidia.com>2020-08-07 09:17:09 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 21:33:21 +0300
commitc1a06df6ebf6ca98fb7a672fe447c7469d6c1968 (patch)
tree9e3dcff386e50a9d85b4b3ad783bd0599b56730f
parentd6efb3ac3e6c19ab722b28bdb9252bae0b9676b6 (diff)
downloadlinux-c1a06df6ebf6ca98fb7a672fe447c7469d6c1968.tar.xz
mm/migrate: fix migrate_pgmap_owner w/o CONFIG_MMU_NOTIFIER
On x86_64, when CONFIG_MMU_NOTIFIER is not set/enabled, there is a compiler error: mm/migrate.c: In function 'migrate_vma_collect': mm/migrate.c:2481:7: error: 'struct mmu_notifier_range' has no member named 'migrate_pgmap_owner' range.migrate_pgmap_owner = migrate->pgmap_owner; ^ Fixes: 998427b3ad2c ("mm/notifier: add migration invalidation type") Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "Jason Gunthorpe" <jgg@mellanox.com> Link: http://lkml.kernel.org/r/20200806193353.7124-1-rcampbell@nvidia.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/mmu_notifier.h13
-rw-r--r--mm/migrate.c6
2 files changed, 16 insertions, 3 deletions
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index c6f0708195cd..b8200782dede 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -521,6 +521,16 @@ 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,
+ struct vm_area_struct *vma, struct mm_struct *mm,
+ unsigned long start, unsigned long end, void *pgmap)
+{
+ mmu_notifier_range_init(range, MMU_NOTIFY_MIGRATE, flags, vma, mm,
+ start, end);
+ range->migrate_pgmap_owner = pgmap;
+}
+
#define ptep_clear_flush_young_notify(__vma, __address, __ptep) \
({ \
int __young; \
@@ -645,6 +655,9 @@ 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) \
+ _mmu_notifier_range_init(range, start, end)
static inline bool
mmu_notifier_range_blockable(const struct mmu_notifier_range *range)
diff --git a/mm/migrate.c b/mm/migrate.c
index 4fcc465736ff..d179657f8685 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2386,9 +2386,9 @@ 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(&range, MMU_NOTIFY_MIGRATE, 0, migrate->vma,
- migrate->vma->vm_mm, migrate->start, migrate->end);
- range.migrate_pgmap_owner = migrate->pgmap_owner;
+ mmu_notifier_range_init_migrate(&range, 0, migrate->vma,
+ migrate->vma->vm_mm, migrate->start, migrate->end,
+ migrate->pgmap_owner);
mmu_notifier_invalidate_range_start(&range);
walk_page_range(migrate->vma->vm_mm, migrate->start, migrate->end,