diff options
Diffstat (limited to 'mm/balloon_compaction.c')
| -rw-r--r-- | mm/balloon_compaction.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c index b06d9fe23a28..68d28924ba79 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -139,6 +139,14 @@ int balloon_page_migrate(struct address_space *mapping, { struct balloon_dev_info *balloon = balloon_page_device(page); + /* + * We can not easily support the no copy case here so ignore it as it + * is unlikely to be use with ballon pages. See include/linux/hmm.h for + * user of the MIGRATE_SYNC_NO_COPY mode. + */ + if (mode == MIGRATE_SYNC_NO_COPY) + return -EINVAL; + VM_BUG_ON_PAGE(!PageLocked(page), page); VM_BUG_ON_PAGE(!PageLocked(newpage), newpage); |