* [PATCH] riscv: Fixup pfn_valid error with wrong max_mapnr
@ 2021-01-21 6:31 guoren
0 siblings, 0 replies; only message in thread
From: guoren @ 2021-01-21 6:31 UTC (permalink / raw
To: palmerdabbelt; +Cc: linux-riscv, Guo Ren, linux-kernel
From: Guo Ren <guoren@linux.alibaba.com>
The max_mapnr is the number of PFNs, not absolute PFN offset.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
---
arch/riscv/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index bf5379135e39..1576ee9e5e94 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -184,7 +184,7 @@ void __init setup_bootmem(void)
max_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_low_pfn = max_pfn;
dma32_phys_limit = min(4UL * SZ_1G, (unsigned long)PFN_PHYS(max_low_pfn));
- set_max_mapnr(max_low_pfn);
+ set_max_mapnr(max_low_pfn - ARCH_PFN_OFFSET);
#ifdef CONFIG_BLK_DEV_INITRD
setup_initrd();
--
2.17.1
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2021-01-21 6:31 [PATCH] riscv: Fixup pfn_valid error with wrong max_mapnr guoren
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