* [PATCH] mm/debug_vm_pgtable: Avoid kernel crash with riscv
@ 2020-10-15 3:32 Aneesh Kumar K.V
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From: Aneesh Kumar K.V @ 2020-10-15 3:32 UTC (permalink / raw)
To: linux-mm, linux-riscv; +Cc: Aneesh Kumar K.V, akpm, Anshuman Khandual
It was observed that the usage of RANDOM_ORVALUE with a valid pte cause
kernel crash on riscv. Comment out the usage of random value on riscv
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
mm/debug_vm_pgtable.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index c36530c69e33..98b101a8fd2a 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -548,7 +548,9 @@ static void __init pte_clear_tests(struct mm_struct *mm, pte_t *ptep,
pte_t pte = pfn_pte(pfn, prot);
pr_debug("Validating PTE clear\n");
+#ifndef CONFIG_RISCV
pte = __pte(pte_val(pte) | RANDOM_ORVALUE);
+#endif
set_pte_at(mm, vaddr, ptep, pte);
barrier();
pte_clear(mm, vaddr, ptep);
--
2.26.2
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