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riscv: Fixup pfn_valid error with wrong max_mapnr 

The max_mapnr is the number of PFNs, not absolute PFN offset.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Fixes: d0d8aae645 ("RISC-V: Set maximum number of mapped pages correctly")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Guo Ren 2021-01-21 14:31:17 +08:00 committed by Palmer Dabbelt
parent 19c329f680
commit 336e8eb2a3
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1 changed files with 1 additions and 1 deletions
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arch/riscv/mm/init.c
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@ -196,7 +196,7 @@ void __init setup_bootmem(void)
max_pfn = PFN_DOWN(dram_end);
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();