LoongArch: mm: Avoid unnecessary page fault retires on shared memory types

Commit d92725256b4f22d0 ("mm: avoid unnecessary page fault retires on
shared memory types") modifies do_page_fault() to handle the VM_FAULT_
COMPLETED case, but forget to change for LoongArch, so fix it as other
architectures does.

Fixes: d92725256b4f22d0 ("mm: avoid unnecessary page fault retires on shared memory types")
Reviewed-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/mm/fault.c b/arch/loongarch/mm/fault.c
index 605579b..1ccd536 100644 (file)
--- a/arch/loongarch/mm/fault.c
+++ b/arch/loongarch/mm/fault.c
@@ -216,6 +216,10 @@ good_area:
                return;
        }
 
+       /* The fault is fully completed (including releasing mmap lock) */
+       if (fault & VM_FAULT_COMPLETED)
+               return;
+
        if (unlikely(fault & VM_FAULT_RETRY)) {
                flags |= FAULT_FLAG_TRIED;