tools/testing/vma: Implement vm_refcnt reset

howlett · tehcaster · commit d09a61a3aa7d · 2025-09-29T09:21:16.000+02:00
Add the reset of the ref count in vma_lock_init().  This is needed if
the vma memory is not zeroed on allocation.

Signed-off-by: Liam R. Howlett &lt;Liam.Howlett@oracle.com&gt;
Reviewed-by: Suren Baghdasaryan &lt;surenb@google.com&gt;
Signed-off-by: Vlastimil Babka &lt;vbabka@suse.cz&gt;
diff --git a/tools/testing/vma/vma_internal.h b/tools/testing/vma/vma_internal.h
@@ -1373,6 +1373,8 @@ static inline void ksm_exit(struct mm_struct *mm)
 
 static inline void vma_lock_init(struct vm_area_struct *vma, bool reset_refcnt)
 {
+	if (reset_refcnt)
+		refcount_set(&vma->vm_refcnt, 0);
 }
 
 static inline void vma_numab_state_init(struct vm_area_struct *vma)

Original file line number	Diff line number	Diff line change
`@@ -1373,6 +1373,8 @@ static inline void ksm_exit(struct mm_struct *mm)`
`1373`	`1373`
`1374`	`1374`	`static inline void vma_lock_init(struct vm_area_struct *vma, bool reset_refcnt)`
`1375`	`1375`	`{`
	`1376`	`+ if (reset_refcnt)`
	`1377`	`+ refcount_set(&vma->vm_refcnt, 0);`
`1376`	`1378`	`}`
`1377`	`1379`
`1378`	`1380`	`static inline void vma_numab_state_init(struct vm_area_struct *vma)`