[PATCH v3 1/2] riscv: Ensure page table writes are flushed when initializing KASAN vmalloc

[Alexandre Ghiti]

Make sure that writes to kernel page table during KASAN vmalloc
initialization are made visible by adding a sfence.vma.

Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx>
---
 arch/riscv/mm/kasan_init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c
index 1b968855d389..57bf4ae09361 100644
--- a/arch/riscv/mm/kasan_init.c
+++ b/arch/riscv/mm/kasan_init.c
@@ -187,6 +187,8 @@ void __init kasan_shallow_populate(void *start, void *end)
 		}
 		vaddr += PAGE_SIZE;
 	}
+
+	local_flush_tlb_all();
 }
 
 void __init kasan_init(void)
-- 
2.20.1