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-rw-r--r--mm/memory.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 9defa853dbd2..2a20e3810534 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -7031,7 +7031,8 @@ bool ptlock_alloc(struct ptdesc *ptdesc)
void ptlock_free(struct ptdesc *ptdesc)
{
- kmem_cache_free(page_ptl_cachep, ptdesc->ptl);
+ if (ptdesc->ptl)
+ kmem_cache_free(page_ptl_cachep, ptdesc->ptl);
}
#endif