From: YangHui <yanghui.def@xxxxxxxxx>
if pte_alloc_one fail alloc a page, do_fault_around will return 0.
and in do_read_fault()->__do_fault(), it also pte_alloc_one a page.
if pte_alloc_one failed to alloc a page,it will return VM_FAULT_OOM.
To reduce code complexity,if alloc failed we return VM_FAULT_OOM.
Signed-off-by: YangHui <yanghui.def@xxxxxxxxx>
---
mm/memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memory.c b/mm/memory.c
index f703fe8..b104879 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3800,7 +3800,7 @@ static vm_fault_t do_fault_around(struct vm_fault *vmf)
if (pmd_none(*vmf->pmd)) {
vmf->prealloc_pte = pte_alloc_one(vmf->vma->vm_mm);
if (!vmf->prealloc_pte)
- goto out;
+ return VM_FAULT_OOM;
smp_wmb(); /* See comment in __pte_alloc() */
}
--
2.7.4
