mm/debug_vm_pgtable: Avoid kernel crash with riscv

PATCH New Aneesh Kumar K.V 1 participant 1 message Oct 15, 2020

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Memory management RISC-V

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Aneesh Kumar K.V

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2020-10-15 03:32 UTC #0 lore raw

PATCH 1/1 mm/debug_vm_pgtable: Avoid kernel crash with riscv

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 <[email protected]>

---
 mm/debug_vm_pgtable.c | 2 ++
 1 file changed, 2 insertions(+)

mm/debug_vm_pgtable.c +2 -0

index c36530c69e33..98b101a8fd2a 100644
@@ -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);

Signature · 1 line

2.26.2