[PATCH] RISC-V: Make sure memblock reserves the memory containing DT

[Atish Patra]

Currently, the memory containing DT is not reserved. Thus, that region
of memory can be reallocated or reused for other purposes. This may result
in  corrupted DT for nommu virt board in Qemu. We may not face any issue
in kendryte as DT is embedded in the kernel image for that.

Fixes: 6bd33e1ece52 ("riscv: add nommu support")
Signed-off-by: Atish Patra <atish.patra at wdc.com>

---
@Palmer This patch is applicable for v5.9 & before. This fix is already
part of the "RISC-V: Move DT mapping outof fixmap" patch from UEFI support
series. That's why, this patch doesn't need to go into for-next.
---
 arch/riscv/mm/init.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 564e0be677b7..cabf1697e748 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -510,6 +510,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
 #else
 	dtb_early_va = (void *)dtb_pa;
 #endif
+	dtb_early_pa = dtb_pa;
 }
 
 static inline void setup_vm_final(void)
-- 
2.25.1