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-rw-r--r--mm/gup.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/gup.c b/mm/gup.c
index 70d65e4015a4..e95b0cb6ed81 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -143,6 +143,10 @@ retry:
mark_page_accessed(page);
}
if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) {
+ /* Do not mlock pte-mapped THP */
+ if (PageTransCompound(page))
+ goto out;
+
/*
* The preliminary mapping check is mainly to avoid the
* pointless overhead of lock_page on the ZERO_PAGE
@@ -920,8 +924,6 @@ long populate_vma_page_range(struct vm_area_struct *vma,
gup_flags = FOLL_TOUCH | FOLL_POPULATE | FOLL_MLOCK;
if (vma->vm_flags & VM_LOCKONFAULT)
gup_flags &= ~FOLL_POPULATE;
- if (vma->vm_flags & VM_LOCKED)
- gup_flags |= FOLL_SPLIT;
/*
* We want to touch writable mappings with a write fault in order
* to break COW, except for shared mappings because these don't COW