diff mbox series

mm/debug_vm_pgtable: Avoid kernel crash with riscv

Message ID 20201015033206.140550-1-aneesh.kumar@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series mm/debug_vm_pgtable: Avoid kernel crash with riscv | expand

Commit Message

Aneesh Kumar K.V Oct. 15, 2020, 3:32 a.m. UTC 
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(+)
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Patch

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);